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@@ -33,3 +33,5 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.zip filter=lfs diff=lfs merge=lfs -text
 *.zst filter=lfs diff=lfs merge=lfs -text
 *tfevents* filter=lfs diff=lfs merge=lfs -text
+unsloth_compiled_cache/__pycache__/UnslothDPOTrainer.cpython-312.pyc filter=lfs diff=lfs merge=lfs -text
+unsloth_compiled_cache/__pycache__/UnslothGRPOTrainer.cpython-312.pyc filter=lfs diff=lfs merge=lfs -text

unsloth_compiled_cache/UnslothAlignPropTrainer.py

@@ -0,0 +1,678 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.alignprop_trainer import (Accelerator, AlignPropConfig, AlignPropTrainer, Any, Callable, DDPOStableDiffusionPipeline, Optional, Path, ProjectConfiguration, PyTorchModelHubMixin, Union, defaultdict, generate_model_card, get_comet_experiment_url, is_wandb_available, logger, os, set_seed, textwrap, torch, wandb, warnings)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothAlignPropConfig(AlignPropConfig):
+    """
+    
+    Configuration class for the [`AlignPropTrainer`].
+
+    Using [`~transformers.HfArgumentParser`] we can turn this class into
+    [argparse](https://docs.python.org/3/library/argparse#module-argparse) arguments that can be specified on the
+    command line.
+
+    Parameters:
+        exp_name (`str`, *optional*, defaults to `os.path.basename(sys.argv[0])[: -len(".py")]`):
+            Name of this experiment (defaults to the file name without the extension).
+        run_name (`str`, *optional*, defaults to `""`):
+            Name of this run.
+        seed (`int`, *optional*, defaults to `0`):
+            Random seed for reproducibility.
+        log_with (`str` or `None`, *optional*, defaults to `None`):
+            Log with either `"wandb"` or `"tensorboard"`. Check
+            [tracking](https://huggingface.co/docs/accelerate/usage_guides/tracking) for more details.
+        log_image_freq (`int`, *optional*, defaults to `1`):
+            Frequency for logging images.
+        tracker_kwargs (`dict[str, Any]`, *optional*, defaults to `{}`):
+            Keyword arguments for the tracker (e.g., `wandb_project`).
+        accelerator_kwargs (`dict[str, Any]`, *optional*, defaults to `{}`):
+            Keyword arguments for the accelerator.
+        project_kwargs (`dict[str, Any]`, *optional*, defaults to `{}`):
+            Keyword arguments for the accelerator project config (e.g., `logging_dir`).
+        tracker_project_name (`str`, *optional*, defaults to `"trl"`):
+            Name of project to use for tracking.
+        logdir (`str`, *optional*, defaults to `"logs"`):
+            Top-level logging directory for checkpoint saving.
+        num_epochs (`int`, *optional*, defaults to `100`):
+            Number of epochs to train.
+        save_freq (`int`, *optional*, defaults to `1`):
+            Number of epochs between saving model checkpoints.
+        num_checkpoint_limit (`int`, *optional*, defaults to `5`):
+            Number of checkpoints to keep before overwriting old ones.
+        mixed_precision (`str`, *optional*, defaults to `"fp16"`):
+            Mixed precision training.
+        allow_tf32 (`bool`, *optional*, defaults to `True`):
+            Allow `tf32` on Ampere GPUs.
+        resume_from (`str`, *optional*, defaults to `""`):
+            Path to resume training from a checkpoint.
+        sample_num_steps (`int`, *optional*, defaults to `50`):
+            Number of sampler inference steps.
+        sample_eta (`float`, *optional*, defaults to `1.0`):
+            Eta parameter for the DDIM sampler.
+        sample_guidance_scale (`float`, *optional*, defaults to `5.0`):
+            Classifier-free guidance weight.
+        train_batch_size (`int`, *optional*, defaults to `1`):
+            Batch size for training.
+        train_use_8bit_adam (`bool`, *optional*, defaults to `False`):
+            Whether to use the 8bit Adam optimizer from `bitsandbytes`.
+        train_learning_rate (`float`, *optional*, defaults to `1e-3`):
+            Learning rate.
+        train_adam_beta1 (`float`, *optional*, defaults to `0.9`):
+            Beta1 for Adam optimizer.
+        train_adam_beta2 (`float`, *optional*, defaults to `0.999`):
+            Beta2 for Adam optimizer.
+        train_adam_weight_decay (`float`, *optional*, defaults to `1e-4`):
+            Weight decay for Adam optimizer.
+        train_adam_epsilon (`float`, *optional*, defaults to `1e-8`):
+            Epsilon value for Adam optimizer.
+        train_gradient_accumulation_steps (`int`, *optional*, defaults to `1`):
+            Number of gradient accumulation steps.
+        train_max_grad_norm (`float`, *optional*, defaults to `1.0`):
+            Maximum gradient norm for gradient clipping.
+        negative_prompts (`str` or `None`, *optional*, defaults to `None`):
+            Comma-separated list of prompts to use as negative examples.
+        truncated_backprop_rand (`bool`, *optional*, defaults to `True`):
+            If `True`, randomized truncation to different diffusion timesteps is used.
+        truncated_backprop_timestep (`int`, *optional*, defaults to `49`):
+            Absolute timestep to which the gradients are backpropagated. Used only if `truncated_backprop_rand=False`.
+        truncated_rand_backprop_minmax (`tuple[int, int]`, *optional*, defaults to `(0, 50)`):
+            Range of diffusion timesteps for randomized truncated backpropagation.
+        push_to_hub (`bool`, *optional*, defaults to `False`):
+            Whether to push the final model to the Hub.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    
+    def __init__(
+        self,
+        exp_name = 'colab_kernel_launcher',
+        run_name = '',
+        seed = 3407,
+        log_with = None,
+        log_image_freq = 1,
+        tracker_project_name = 'trl',
+        logdir = 'logs',
+        num_epochs = 100,
+        save_freq = 1,
+        num_checkpoint_limit = 5,
+        mixed_precision = 'fp16',
+        allow_tf32 = True,
+        resume_from = '',
+        sample_num_steps = 50,
+        sample_eta = 1.0,
+        sample_guidance_scale = 5.0,
+        train_batch_size = 1,
+        train_use_8bit_adam = False,
+        train_learning_rate = 5e-05,
+        train_adam_beta1 = 0.9,
+        train_adam_beta2 = 0.999,
+        train_adam_weight_decay = 0.01,
+        train_adam_epsilon = 1e-08,
+        train_gradient_accumulation_steps = 2,
+        train_max_grad_norm = 1.0,
+        negative_prompts = None,
+        truncated_backprop_rand = True,
+        truncated_backprop_timestep = 49,
+        push_to_hub = False,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        
+        **kwargs,
+    ):
+        
+        super().__init__(
+            exp_name = exp_name,
+            run_name = run_name,
+            seed = seed,
+            log_with = log_with,
+            log_image_freq = log_image_freq,
+            tracker_project_name = tracker_project_name,
+            logdir = logdir,
+            num_epochs = num_epochs,
+            save_freq = save_freq,
+            num_checkpoint_limit = num_checkpoint_limit,
+            mixed_precision = mixed_precision,
+            allow_tf32 = allow_tf32,
+            resume_from = resume_from,
+            sample_num_steps = sample_num_steps,
+            sample_eta = sample_eta,
+            sample_guidance_scale = sample_guidance_scale,
+            train_batch_size = train_batch_size,
+            train_use_8bit_adam = train_use_8bit_adam,
+            train_learning_rate = train_learning_rate,
+            train_adam_beta1 = train_adam_beta1,
+            train_adam_beta2 = train_adam_beta2,
+            train_adam_weight_decay = train_adam_weight_decay,
+            train_adam_epsilon = train_adam_epsilon,
+            train_gradient_accumulation_steps = train_gradient_accumulation_steps,
+            train_max_grad_norm = train_max_grad_norm,
+            negative_prompts = negative_prompts,
+            truncated_backprop_rand = truncated_backprop_rand,
+            truncated_backprop_timestep = truncated_backprop_timestep,
+            push_to_hub = push_to_hub,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        
+pass
+
+class _UnslothAlignPropTrainer(PyTorchModelHubMixin):
+    """"""
+
+    _tag_names = ["trl", "alignprop"]
+
+    def __init__(
+        self,
+        config: AlignPropConfig,
+        reward_function: Callable[[torch.Tensor, tuple[str], tuple[Any]], torch.Tensor],
+        prompt_function: Callable[[], tuple[str, Any]],
+        sd_pipeline: DDPOStableDiffusionPipeline,
+        image_samples_hook: Optional[Callable[[Any, Any, Any], Any]] = None,
+    ):
+        warnings.warn(
+            "AlignPropTrainer is deprecated and will be removed in version 0.23.0.",
+            DeprecationWarning,
+        )
+        if image_samples_hook is None:
+            warnings.warn("No image_samples_hook provided; no images will be logged")
+
+        self.prompt_fn = prompt_function
+        self.reward_fn = reward_function
+        self.config = config
+        self.image_samples_callback = image_samples_hook
+
+        accelerator_project_config = ProjectConfiguration(**self.config.project_kwargs)
+
+        if self.config.resume_from:
+            self.config.resume_from = os.path.normpath(os.path.expanduser(self.config.resume_from))
+            if "checkpoint_" not in os.path.basename(self.config.resume_from):
+                # get the most recent checkpoint in this directory
+                checkpoints = list(
+                    filter(
+                        lambda x: "checkpoint_" in x,
+                        os.listdir(self.config.resume_from),
+                    )
+                )
+                if len(checkpoints) == 0:
+                    raise ValueError(f"No checkpoints found in {self.config.resume_from}")
+                checkpoint_numbers = sorted([int(x.split("_")[-1]) for x in checkpoints])
+                self.config.resume_from = os.path.join(
+                    self.config.resume_from,
+                    f"checkpoint_{checkpoint_numbers[-1]}",
+                )
+
+                accelerator_project_config.iteration = checkpoint_numbers[-1] + 1
+
+        self.accelerator = Accelerator(
+            log_with=self.config.log_with,
+            mixed_precision=self.config.mixed_precision,
+            project_config=accelerator_project_config,
+            # we always accumulate gradients across timesteps; we want config.train.gradient_accumulation_steps to be the
+            # number of *samples* we accumulate across, so we need to multiply by the number of training timesteps to get
+            # the total number of optimizer steps to accumulate across.
+            gradient_accumulation_steps=self.config.train_gradient_accumulation_steps,
+            **self.config.accelerator_kwargs,
+        )
+
+        is_using_tensorboard = config.log_with is not None and config.log_with == "tensorboard"
+
+        if self.accelerator.is_main_process:
+            self.accelerator.init_trackers(
+                self.config.tracker_project_name,
+                config=dict(alignprop_trainer_config=config.to_dict())
+                if not is_using_tensorboard
+                else config.to_dict(),
+                init_kwargs=self.config.tracker_kwargs,
+            )
+
+        logger.info(f"\n{config}")
+
+        set_seed(self.config.seed, device_specific=True)
+
+        self.sd_pipeline = sd_pipeline
+
+        self.sd_pipeline.set_progress_bar_config(
+            position=1,
+            disable=not self.accelerator.is_local_main_process,
+            leave=False,
+            desc="Timestep",
+            dynamic_ncols=True,
+        )
+
+        # For mixed precision training we cast all non-trainable weights [vae, non-lora text_encoder and non-lora unet] to half-precision
+        # as these weights are only used for inference, keeping weights in full precision is not required.
+        if self.accelerator.mixed_precision == "fp16":
+            inference_dtype = torch.float16
+        elif self.accelerator.mixed_precision == "bf16":
+            inference_dtype = torch.bfloat16
+        else:
+            inference_dtype = torch.float32
+
+        self.sd_pipeline.vae.to(self.accelerator.device, dtype=inference_dtype)
+        self.sd_pipeline.text_encoder.to(self.accelerator.device, dtype=inference_dtype)
+        self.sd_pipeline.unet.to(self.accelerator.device, dtype=inference_dtype)
+
+        trainable_layers = self.sd_pipeline.get_trainable_layers()
+
+        self.accelerator.register_save_state_pre_hook(self._save_model_hook)
+        self.accelerator.register_load_state_pre_hook(self._load_model_hook)
+
+        # Enable TF32 for faster training on Ampere GPUs,
+        # cf https://pytorch.org/docs/stable/notes/cuda.html#tensorfloat-32-tf32-on-ampere-devices
+        if self.config.allow_tf32:
+            torch.backends.cuda.matmul.allow_tf32 = True
+
+        self.optimizer = self._setup_optimizer(
+            trainable_layers.parameters() if not isinstance(trainable_layers, list) else trainable_layers
+        )
+
+        self.neg_prompt_embed = self.sd_pipeline.text_encoder(
+            self.sd_pipeline.tokenizer(
+                [""] if self.config.negative_prompts is None else self.config.negative_prompts,
+                return_tensors="pt",
+                padding="max_length",
+                truncation=True,
+                max_length=self.sd_pipeline.tokenizer.model_max_length,
+            ).input_ids.to(self.accelerator.device)
+        )[0]
+
+        # NOTE: for some reason, autocast is necessary for non-lora training but for lora training it isn't necessary and it uses
+        # more memory
+        self.autocast = self.sd_pipeline.autocast or self.accelerator.autocast
+
+        if hasattr(self.sd_pipeline, "use_lora") and self.sd_pipeline.use_lora:
+            unet, self.optimizer = self.accelerator.prepare(trainable_layers, self.optimizer)
+            self.trainable_layers = list(filter(lambda p: p.requires_grad, unet.parameters()))
+        else:
+            self.trainable_layers, self.optimizer = self.accelerator.prepare(trainable_layers, self.optimizer)
+
+        if config.resume_from:
+            logger.info(f"Resuming from {config.resume_from}")
+            self.accelerator.load_state(config.resume_from)
+            self.first_epoch = int(config.resume_from.split("_")[-1]) + 1
+        else:
+            self.first_epoch = 0
+
+    def compute_rewards(self, prompt_image_pairs):
+        reward, reward_metadata = self.reward_fn(
+            prompt_image_pairs["images"], prompt_image_pairs["prompts"], prompt_image_pairs["prompt_metadata"]
+        )
+        return reward
+
+    def step(self, epoch: int, global_step: int):
+        """
+        Perform a single step of training.
+
+        Args:
+            epoch (int): The current epoch.
+            global_step (int): The current global step.
+
+        Side Effects:
+            - Model weights are updated
+            - Logs the statistics to the accelerator trackers.
+            - If `self.image_samples_callback` is not None, it will be called with the prompt_image_pairs, global_step,
+              and the accelerator tracker.
+
+        Returns:
+            global_step (int): The updated global step.
+        """
+        info = defaultdict(list)
+
+        self.sd_pipeline.unet.train()
+
+        for _ in range(self.config.train_gradient_accumulation_steps):
+            with self.accelerator.accumulate(self.sd_pipeline.unet), self.autocast(), torch.enable_grad():
+                prompt_image_pairs = self._generate_samples(
+                    batch_size=self.config.train_batch_size,
+                )
+
+                rewards = self.compute_rewards(prompt_image_pairs)
+
+                prompt_image_pairs["rewards"] = rewards
+
+                rewards_vis = self.accelerator.gather(rewards).detach().cpu().numpy()
+
+                loss = self.calculate_loss(rewards)
+
+                self.accelerator.backward(loss)
+
+                if self.accelerator.sync_gradients:
+                    self.accelerator.clip_grad_norm_(
+                        self.trainable_layers.parameters()
+                        if not isinstance(self.trainable_layers, list)
+                        else self.trainable_layers,
+                        self.config.train_max_grad_norm,
+                    )
+
+                self.optimizer.step()
+                self.optimizer.zero_grad()
+
+            info["reward_mean"].append(rewards_vis.mean())
+            info["reward_std"].append(rewards_vis.std())
+            info["loss"].append(loss.item())
+
+        # Checks if the accelerator has performed an optimization step behind the scenes
+        if self.accelerator.sync_gradients:
+            # log training-related stuff
+            info = {k: torch.mean(torch.tensor(v)) for k, v in info.items()}
+            info = self.accelerator.reduce(info, reduction="mean")
+            info.update({"epoch": epoch})
+            self.accelerator.log(info, step=global_step)
+            global_step += 1
+            info = defaultdict(list)
+        else:
+            raise ValueError(
+                "Optimization step should have been performed by this point. Please check calculated gradient accumulation settings."
+            )
+        # Logs generated images
+        if self.image_samples_callback is not None and global_step % self.config.log_image_freq == 0:
+            self.image_samples_callback(prompt_image_pairs, global_step, self.accelerator.trackers[0])
+
+        if epoch != 0 and epoch % self.config.save_freq == 0 and self.accelerator.is_main_process:
+            self.accelerator.save_state()
+
+        return global_step
+
+    def calculate_loss(self, rewards):
+        """
+        Calculate the loss for a batch of an unpacked sample
+
+        Args:
+            rewards (torch.Tensor):
+                Differentiable reward scalars for each generated image, shape: [batch_size]
+
+        Returns:
+            loss (torch.Tensor) (all of these are of shape (1,))
+        """
+        #  Loss is specific to Aesthetic Reward function used in AlignProp (https://huggingface.co/papers/2310.03739)
+        loss = 10.0 - (rewards).mean()
+        return loss
+
+    def loss(
+        self,
+        advantages: torch.Tensor,
+        clip_range: float,
+        ratio: torch.Tensor,
+    ):
+        unclipped_loss = -advantages * ratio
+        clipped_loss = -advantages * torch.clamp(
+            ratio,
+            1.0 - clip_range,
+            1.0 + clip_range,
+        )
+        return torch.mean(torch.maximum(unclipped_loss, clipped_loss))
+
+    def _setup_optimizer(self, trainable_layers_parameters):
+        if self.config.train_use_8bit_adam:
+            import bitsandbytes
+
+            optimizer_cls = bitsandbytes.optim.AdamW8bit
+        else:
+            optimizer_cls = torch.optim.AdamW
+
+        return optimizer_cls(
+            trainable_layers_parameters,
+            lr=self.config.train_learning_rate,
+            betas=(self.config.train_adam_beta1, self.config.train_adam_beta2),
+            weight_decay=self.config.train_adam_weight_decay,
+            eps=self.config.train_adam_epsilon,
+        )
+
+    def _save_model_hook(self, models, weights, output_dir):
+        self.sd_pipeline.save_checkpoint(models, weights, output_dir)
+        weights.pop()  # ensures that accelerate doesn't try to handle saving of the model
+
+    def _load_model_hook(self, models, input_dir):
+        self.sd_pipeline.load_checkpoint(models, input_dir)
+        models.pop()  # ensures that accelerate doesn't try to handle loading of the model
+
+    def _generate_samples(self, batch_size, with_grad=True, prompts=None):
+        """
+        Generate samples from the model
+
+        Args:
+            batch_size (int): Batch size to use for sampling
+            with_grad (bool): Whether the generated RGBs should have gradients attached to it.
+
+        Returns:
+            prompt_image_pairs (dict[Any])
+        """
+        prompt_image_pairs = {}
+
+        sample_neg_prompt_embeds = self.neg_prompt_embed.repeat(batch_size, 1, 1)
+
+        if prompts is None:
+            prompts, prompt_metadata = zip(*[self.prompt_fn() for _ in range(batch_size)])
+        else:
+            prompt_metadata = [{} for _ in range(batch_size)]
+
+        prompt_ids = self.sd_pipeline.tokenizer(
+            prompts,
+            return_tensors="pt",
+            padding="max_length",
+            truncation=True,
+            max_length=self.sd_pipeline.tokenizer.model_max_length,
+        ).input_ids.to(self.accelerator.device)
+
+        prompt_embeds = self.sd_pipeline.text_encoder(prompt_ids)[0]
+
+        if with_grad:
+            sd_output = self.sd_pipeline.rgb_with_grad(
+                prompt_embeds=prompt_embeds,
+                negative_prompt_embeds=sample_neg_prompt_embeds,
+                num_inference_steps=self.config.sample_num_steps,
+                guidance_scale=self.config.sample_guidance_scale,
+                eta=self.config.sample_eta,
+                truncated_backprop_rand=self.config.truncated_backprop_rand,
+                truncated_backprop_timestep=self.config.truncated_backprop_timestep,
+                truncated_rand_backprop_minmax=self.config.truncated_rand_backprop_minmax,
+                output_type="pt",
+            )
+        else:
+            sd_output = self.sd_pipeline(
+                prompt_embeds=prompt_embeds,
+                negative_prompt_embeds=sample_neg_prompt_embeds,
+                num_inference_steps=self.config.sample_num_steps,
+                guidance_scale=self.config.sample_guidance_scale,
+                eta=self.config.sample_eta,
+                output_type="pt",
+            )
+
+        images = sd_output.images
+
+        prompt_image_pairs["images"] = images
+        prompt_image_pairs["prompts"] = prompts
+        prompt_image_pairs["prompt_metadata"] = prompt_metadata
+
+        return prompt_image_pairs
+
+    def train(self, epochs: Optional[int] = None):
+        """
+        Train the model for a given number of epochs
+        """
+        global_step = 0
+        if epochs is None:
+            epochs = self.config.num_epochs
+        for epoch in range(self.first_epoch, epochs):
+            global_step = self.step(epoch, global_step)
+
+    def _save_pretrained(self, save_directory):
+        self.sd_pipeline.save_pretrained(save_directory)
+        self.create_model_card()
+
+    # Ensure the model card is saved along with the checkpoint
+    def _save_checkpoint(self, model, trial):
+        if self.args.hub_model_id is None:
+            model_name = Path(self.args.output_dir).name
+        else:
+            model_name = self.args.hub_model_id.split("/")[-1]
+        self.create_model_card(model_name=model_name)
+        super()._save_checkpoint(model, trial)
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        citation = textwrap.dedent("""\
+        @article{prabhudesai2024aligning,
+            title        = {{Aligning Text-to-Image Diffusion Models with Reward Backpropagation}},
+            author       = {Mihir Prabhudesai and Anirudh Goyal and Deepak Pathak and Katerina Fragkiadaki},
+            year         = 2024,
+            eprint       = {arXiv:2310.03739}
+        }""")
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="AlignProp",
+            trainer_citation=citation,
+            paper_title="Aligning Text-to-Image Diffusion Models with Reward Backpropagation",
+            paper_id="2310.03739",
+        )
+
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothAlignPropTrainer(_UnslothAlignPropTrainer):
+    """
+    
+    The AlignPropTrainer uses Deep Diffusion Policy Optimization to optimise diffusion models. Note, this trainer is
+    heavily inspired by the work here: https://github.com/mihirp1998/AlignProp/ As of now only Stable Diffusion based
+    pipelines are supported
+
+    Attributes:
+        config (`AlignPropConfig`):
+            Configuration object for AlignPropTrainer. Check the documentation of `PPOConfig` for more details.
+        reward_function (`Callable[[torch.Tensor, tuple[str], tuple[Any]], torch.Tensor]`):
+            Reward function to be used
+        prompt_function (`Callable[[], tuple[str, Any]]`):
+            Function to generate prompts to guide model
+        sd_pipeline (`DDPOStableDiffusionPipeline`):
+            Stable Diffusion pipeline to be used for training.
+        image_samples_hook (`Optional[Callable[[Any, Any, Any], Any]]`):
+            Hook to be called to log images
+    
+    """
+    def __init__(
+        self,
+        config,
+        reward_function,
+        prompt_function,
+        sd_pipeline,
+        image_samples_hook = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothAlignPropConfig()
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('alignprop_trainer', other_metrics)
+        
+        super().__init__(
+            config = config,
+            reward_function = reward_function,
+            prompt_function = prompt_function,
+            sd_pipeline = sd_pipeline,
+            image_samples_hook = image_samples_hook,**kwargs)
+        
+pass
+
+
+if hasattr(logger, "addFilter"):
+    import logging
+    class HideLoggingMessage(logging.Filter):
+        def __init__(self, text): self.text = text
+        def filter(self, x): return not (self.text in x.getMessage())
+    pass
+    logger.addFilter(HideLoggingMessage("`use_cache=True`"))
+

unsloth_compiled_cache/UnslothBCOTrainer.py

@@ -0,0 +1,1857 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.bco_trainer import (Any, AutoModelForCausalLM, BCOConfig, BCOTrainer, BaseImageProcessor, CLF_NAME, Callable, DPODataCollatorWithPadding, DataCollator, DataLoader, Dataset, EvalLoopOutput, F, FeatureExtractionMixin, Literal, LogisticRegression, Optional, PartialState, Path, PeftModel, PreTrainedModel, PreTrainedTokenizerBase, ProcessorMixin, RUNNING_NAME, RunningMoments, SequentialSampler, Trainer, TrainerCallback, TrainingArguments, Union, _process_tokens, _tokenize, autocast, contextmanager, create_reference_model, defaultdict, disable_dropout_in_model, generate_model_card, get_comet_experiment_url, has_length, inspect, is_comet_available, is_joblib_available, is_peft_available, is_sklearn_available, is_wandb_available, itemgetter, joblib, log_table_to_comet_experiment, logger, maybe_apply_chat_template, nn, np, nullcontext, os, pad_to_length, pd, peft_module_casting_to_bf16, prepare_deepspeed, prepare_model_for_kbit_training, random, selective_log_softmax, textwrap, torch, tqdm, wandb, warnings, F, Optional, PeftModel, PreTrainedModel, Trainer, is_peft_available, logger, os, torch)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothBCOConfig(BCOConfig):
+    """
+    
+    Configuration class for the [`BCOTrainer`].
+
+    This class includes only the parameters that are specific to BCO training. For a full list of training arguments,
+    please refer to the [`~transformers.TrainingArguments`] documentation. Note that default values in this class may
+    differ from those in [`~transformers.TrainingArguments`].
+
+    Using [`~transformers.HfArgumentParser`] we can turn this class into
+    [argparse](https://docs.python.org/3/library/argparse#module-argparse) arguments that can be specified on the
+    command line.
+
+    Parameters:
+        max_length (`int` or `None`, *optional*, defaults to `1024`):
+            Maximum length of the sequences (prompt + completion) in the batch. This argument is required if you want
+            to use the default data collator.
+        max_prompt_length (`int` or `None`, *optional*, defaults to `512`):
+            Maximum length of the prompt. This argument is required if you want to use the default data collator.
+        max_completion_length (`int` or `None`, *optional*, defaults to `None`):
+            Maximum length of the completion. This argument is required if you want to use the default data collator
+            and your model is an encoder-decoder.
+        beta (`float`, *optional*, defaults to `0.1`):
+            Parameter controlling the deviation from the reference model. Higher β means less deviation from the
+            reference model.
+        label_pad_token_id (`int`,  *optional*, defaults to `-100`):
+            Label pad token id. This argument is required if you want to use the default data collator.
+        padding_value (`int` or `None`, *optional*, defaults to `None`):
+            Padding value to use. If `None`, the padding value of the tokenizer is used.
+        truncation_mode (`str`, *optional*, defaults to `"keep_end"`):
+            Truncation mode to use when the prompt is too long. Possible values are `"keep_end"` or `"keep_start"`.
+            This argument is required if you want to use the default data collator.
+        disable_dropout (`bool`, *optional*, defaults to `True`):
+            Whether to disable dropout in the model and reference model.
+        generate_during_eval (`bool`, *optional*, defaults to `False`):
+            If `True`, generates and logs completions from both the model and the reference model to W&B or Comet
+            during evaluation.
+        is_encoder_decoder (`bool` or `None`, *optional*, defaults to `None`):
+            When using the `model_init` argument (callable) to instantiate the model instead of the `model` argument,
+            you need to specify if the model returned by the callable is an encoder-decoder model.
+        precompute_ref_log_probs (`bool`, *optional*, defaults to `False`):
+            Whether to precompute reference model log probabilities for training and evaluation datasets. This is
+            useful when training without the reference model to reduce the total GPU memory needed.
+        model_init_kwargs (`dict[str, Any]` or `None`, *optional*, defaults to `None`):
+            Keyword arguments to pass to `AutoModelForCausalLM.from_pretrained` when instantiating the model from a
+            string.
+        ref_model_init_kwargs (`dict[str, Any]` or `None`, *optional*, defaults to `None`):
+            Keyword arguments to pass to `AutoModelForCausalLM.from_pretrained` when instantiating the reference model
+            from a string.
+        dataset_num_proc (`int` or `None`, *optional*, defaults to `None`):
+            Number of processes to use for processing the dataset.
+        prompt_sample_size (`int`, *optional*, defaults to `1024`):
+            Number of prompts that are fed to density ratio classifier.
+        min_density_ratio (`float`, *optional*, defaults to `0.5`):
+            Minimum value of the density ratio. The estimated density ratio is clamped to this value.
+        max_density_ratio (`float`, *optional*, defaults to `10.0`):
+            Maximum value of the density ratio. The estimated density ratio is clamped to this value.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    max_seq_length : Optional[int] = field(
+        default = None,
+        metadata = {'help': 'Maximum sequence length to truncate to.'},
+    )
+    def __init__(
+        self,
+        output_dir = None,
+        overwrite_output_dir = None,
+        do_train = False,
+        do_eval = False,
+        do_predict = False,
+        eval_strategy = 'no',
+        prediction_loss_only = False,
+        per_device_train_batch_size = 4,
+        per_device_eval_batch_size = 4,
+        per_gpu_train_batch_size = None,
+        per_gpu_eval_batch_size = None,
+        gradient_accumulation_steps = 2,
+        eval_accumulation_steps = 2,
+        eval_delay = 0,
+        torch_empty_cache_steps = 250,
+        learning_rate = 5e-05,
+        weight_decay = 0.01,
+        adam_beta1 = 0.9,
+        adam_beta2 = 0.999,
+        adam_epsilon = 1e-08,
+        max_grad_norm = 1.0,
+        num_train_epochs = 3.0,
+        max_steps = -1,
+        lr_scheduler_type = 'linear',
+        warmup_ratio = 0.1,
+        warmup_steps = 0,
+        log_level = 'passive',
+        log_level_replica = 'warning',
+        log_on_each_node = True,
+        logging_dir = None,
+        logging_strategy = 'steps',
+        logging_first_step = False,
+        logging_steps = 1,
+        logging_nan_inf_filter = False,
+        save_strategy = 'steps',
+        save_steps = 500,
+        save_total_limit = None,
+        save_safetensors = True,
+        save_on_each_node = False,
+        save_only_model = False,
+        restore_callback_states_from_checkpoint = False,
+        no_cuda = False,
+        use_cpu = False,
+        use_mps_device = False,
+        seed = 3407,
+        data_seed = 3407,
+        jit_mode_eval = False,
+        use_ipex = False,
+        bf16 = False,
+        fp16 = False,
+        fp16_opt_level = 'O1',
+        half_precision_backend = 'auto',
+        bf16_full_eval = False,
+        fp16_full_eval = False,
+        tf32 = None,
+        local_rank = -1,
+        ddp_backend = None,
+        tpu_num_cores = None,
+        tpu_metrics_debug = False,
+        debug = '',
+        dataloader_drop_last = False,
+        eval_steps = None,
+        dataloader_num_workers = 0,
+        dataloader_prefetch_factor = None,
+        past_index = -1,
+        run_name = None,
+        disable_tqdm = None,
+        remove_unused_columns = True,
+        label_names = None,
+        load_best_model_at_end = False,
+        metric_for_best_model = None,
+        greater_is_better = None,
+        ignore_data_skip = False,
+        fsdp = '',
+        fsdp_min_num_params = 0,
+        fsdp_config = None,
+        fsdp_transformer_layer_cls_to_wrap = None,
+        accelerator_config = None,
+        deepspeed = None,
+        label_smoothing_factor = 0.0,
+        optim = 'adamw_8bit',
+        optim_args = None,
+        adafactor = False,
+        group_by_length = False,
+        length_column_name = 'length',
+        report_to = None,
+        ddp_find_unused_parameters = None,
+        ddp_bucket_cap_mb = None,
+        ddp_broadcast_buffers = None,
+        dataloader_pin_memory = True,
+        dataloader_persistent_workers = False,
+        skip_memory_metrics = True,
+        use_legacy_prediction_loop = False,
+        push_to_hub = False,
+        resume_from_checkpoint = None,
+        hub_model_id = None,
+        hub_strategy = 'every_save',
+        hub_token = None,
+        hub_private_repo = None,
+        hub_always_push = False,
+        hub_revision = None,
+        gradient_checkpointing = False,
+        gradient_checkpointing_kwargs = None,
+        include_inputs_for_metrics = False,
+        eval_do_concat_batches = True,
+        fp16_backend = 'auto',
+        push_to_hub_model_id = None,
+        push_to_hub_organization = None,
+        push_to_hub_token = None,
+        mp_parameters = '',
+        auto_find_batch_size = True,
+        full_determinism = False,
+        torchdynamo = None,
+        ray_scope = 'last',
+        ddp_timeout = 1800,
+        torch_compile = False,
+        torch_compile_backend = None,
+        torch_compile_mode = None,
+        include_tokens_per_second = False,
+        include_num_input_tokens_seen = False,
+        neftune_noise_alpha = None,
+        optim_target_modules = None,
+        batch_eval_metrics = False,
+        eval_on_start = False,
+        use_liger_kernel = False,
+        liger_kernel_config = None,
+        eval_use_gather_object = False,
+        average_tokens_across_devices = True,
+        max_length = 1024,
+        max_prompt_length = 512,
+        max_completion_length = None,
+        beta = 0.1,
+        label_pad_token_id = -100,
+        padding_value = None,
+        truncation_mode = 'keep_end',
+        disable_dropout = True,
+        generate_during_eval = False,
+        is_encoder_decoder = None,
+        precompute_ref_log_probs = False,
+        model_init_kwargs = None,
+        ref_model_init_kwargs = None,
+        dataset_num_proc = None,
+        prompt_sample_size = 1024,
+        min_density_ratio = 0.5,
+        max_density_ratio = 10.0,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        max_seq_length = None,
+        **kwargs,
+    ):
+        if learning_rate < 1e-7: raise FloatingPointError(f'Unsloth: Your learning rate of `{learning_rate}` is too small and less than 1e-7! Consider increasing it, otherwise gradient updates will be close to 0!')
+        if learning_rate > 1: raise OverflowError(f'Unsloth: Your learning rate of `{learning_rate}` is way too larger > 1! Consider decreasing it to 1e-1, otherwise gradient updates will explode!')
+        if output_dir is None and save_strategy == 'steps' and save_steps == 500:
+            output_dir = 'unsloth_training_checkpoints'
+            save_strategy = 'no'
+        if dataset_num_proc is None:
+            from multiprocessing import cpu_count
+            dataset_num_proc = min(cpu_count()*2, 2)
+        
+        super().__init__(
+            output_dir = output_dir,
+            overwrite_output_dir = overwrite_output_dir,
+            do_train = do_train,
+            do_eval = do_eval,
+            do_predict = do_predict,
+            eval_strategy = eval_strategy,
+            prediction_loss_only = prediction_loss_only,
+            per_device_train_batch_size = per_device_train_batch_size,
+            per_device_eval_batch_size = per_device_eval_batch_size,
+            per_gpu_train_batch_size = per_gpu_train_batch_size,
+            per_gpu_eval_batch_size = per_gpu_eval_batch_size,
+            gradient_accumulation_steps = gradient_accumulation_steps,
+            eval_accumulation_steps = eval_accumulation_steps,
+            eval_delay = eval_delay,
+            torch_empty_cache_steps = torch_empty_cache_steps,
+            learning_rate = learning_rate,
+            weight_decay = weight_decay,
+            adam_beta1 = adam_beta1,
+            adam_beta2 = adam_beta2,
+            adam_epsilon = adam_epsilon,
+            max_grad_norm = max_grad_norm,
+            num_train_epochs = num_train_epochs,
+            max_steps = max_steps,
+            lr_scheduler_type = lr_scheduler_type,
+            warmup_ratio = warmup_ratio,
+            warmup_steps = warmup_steps,
+            log_level = log_level,
+            log_level_replica = log_level_replica,
+            log_on_each_node = log_on_each_node,
+            logging_dir = logging_dir,
+            logging_strategy = logging_strategy,
+            logging_first_step = logging_first_step,
+            logging_steps = logging_steps,
+            logging_nan_inf_filter = logging_nan_inf_filter,
+            save_strategy = save_strategy,
+            save_steps = save_steps,
+            save_total_limit = save_total_limit,
+            save_safetensors = save_safetensors,
+            save_on_each_node = save_on_each_node,
+            save_only_model = save_only_model,
+            restore_callback_states_from_checkpoint = restore_callback_states_from_checkpoint,
+            no_cuda = no_cuda,
+            use_cpu = use_cpu,
+            use_mps_device = use_mps_device,
+            seed = seed,
+            data_seed = data_seed,
+            jit_mode_eval = jit_mode_eval,
+            use_ipex = use_ipex,
+            bf16 = bf16,
+            fp16 = fp16,
+            fp16_opt_level = fp16_opt_level,
+            half_precision_backend = half_precision_backend,
+            bf16_full_eval = bf16_full_eval,
+            fp16_full_eval = fp16_full_eval,
+            tf32 = tf32,
+            local_rank = local_rank,
+            ddp_backend = ddp_backend,
+            tpu_num_cores = tpu_num_cores,
+            tpu_metrics_debug = tpu_metrics_debug,
+            debug = debug,
+            dataloader_drop_last = dataloader_drop_last,
+            eval_steps = eval_steps,
+            dataloader_num_workers = dataloader_num_workers,
+            dataloader_prefetch_factor = dataloader_prefetch_factor,
+            past_index = past_index,
+            run_name = run_name,
+            disable_tqdm = disable_tqdm,
+            remove_unused_columns = remove_unused_columns,
+            label_names = label_names,
+            load_best_model_at_end = load_best_model_at_end,
+            metric_for_best_model = metric_for_best_model,
+            greater_is_better = greater_is_better,
+            ignore_data_skip = ignore_data_skip,
+            fsdp = fsdp,
+            fsdp_min_num_params = fsdp_min_num_params,
+            fsdp_config = fsdp_config,
+            fsdp_transformer_layer_cls_to_wrap = fsdp_transformer_layer_cls_to_wrap,
+            accelerator_config = accelerator_config,
+            deepspeed = deepspeed,
+            label_smoothing_factor = label_smoothing_factor,
+            optim = optim,
+            optim_args = optim_args,
+            adafactor = adafactor,
+            group_by_length = group_by_length,
+            length_column_name = length_column_name,
+            report_to = report_to,
+            ddp_find_unused_parameters = ddp_find_unused_parameters,
+            ddp_bucket_cap_mb = ddp_bucket_cap_mb,
+            ddp_broadcast_buffers = ddp_broadcast_buffers,
+            dataloader_pin_memory = dataloader_pin_memory,
+            dataloader_persistent_workers = dataloader_persistent_workers,
+            skip_memory_metrics = skip_memory_metrics,
+            use_legacy_prediction_loop = use_legacy_prediction_loop,
+            push_to_hub = push_to_hub,
+            resume_from_checkpoint = resume_from_checkpoint,
+            hub_model_id = hub_model_id,
+            hub_strategy = hub_strategy,
+            hub_token = hub_token,
+            hub_private_repo = hub_private_repo,
+            hub_always_push = hub_always_push,
+            hub_revision = hub_revision,
+            gradient_checkpointing = gradient_checkpointing,
+            gradient_checkpointing_kwargs = gradient_checkpointing_kwargs,
+            include_inputs_for_metrics = include_inputs_for_metrics,
+            eval_do_concat_batches = eval_do_concat_batches,
+            fp16_backend = fp16_backend,
+            push_to_hub_model_id = push_to_hub_model_id,
+            push_to_hub_organization = push_to_hub_organization,
+            push_to_hub_token = push_to_hub_token,
+            mp_parameters = mp_parameters,
+            auto_find_batch_size = auto_find_batch_size,
+            full_determinism = full_determinism,
+            torchdynamo = torchdynamo,
+            ray_scope = ray_scope,
+            ddp_timeout = ddp_timeout,
+            torch_compile = torch_compile,
+            torch_compile_backend = torch_compile_backend,
+            torch_compile_mode = torch_compile_mode,
+            include_tokens_per_second = include_tokens_per_second,
+            include_num_input_tokens_seen = include_num_input_tokens_seen,
+            neftune_noise_alpha = neftune_noise_alpha,
+            optim_target_modules = optim_target_modules,
+            batch_eval_metrics = batch_eval_metrics,
+            eval_on_start = eval_on_start,
+            use_liger_kernel = use_liger_kernel,
+            liger_kernel_config = liger_kernel_config,
+            eval_use_gather_object = eval_use_gather_object,
+            average_tokens_across_devices = average_tokens_across_devices,
+            max_length = max_length,
+            max_prompt_length = max_prompt_length,
+            max_completion_length = max_completion_length,
+            beta = beta,
+            label_pad_token_id = label_pad_token_id,
+            padding_value = padding_value,
+            truncation_mode = truncation_mode,
+            disable_dropout = disable_dropout,
+            generate_during_eval = generate_during_eval,
+            is_encoder_decoder = is_encoder_decoder,
+            precompute_ref_log_probs = precompute_ref_log_probs,
+            model_init_kwargs = model_init_kwargs,
+            ref_model_init_kwargs = ref_model_init_kwargs,
+            dataset_num_proc = dataset_num_proc,
+            prompt_sample_size = prompt_sample_size,
+            min_density_ratio = min_density_ratio,
+            max_density_ratio = max_density_ratio,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        self.max_seq_length = max_seq_length
+pass
+
+class _UnslothBCOTrainer(Trainer):
+    r""""""
+
+    _tag_names = ["trl", "bco"]
+
+    def __init__(
+        self,
+        model: Union[PreTrainedModel, nn.Module, str] = None,
+        ref_model: Optional[Union[PreTrainedModel, nn.Module, str]] = None,
+        args: BCOConfig = None,
+        train_dataset: Optional[Dataset] = None,
+        eval_dataset: Optional[Union[Dataset, dict[str, Dataset]]] = None,
+        processing_class: Optional[
+            Union[PreTrainedTokenizerBase, BaseImageProcessor, FeatureExtractionMixin, ProcessorMixin]
+        ] = None,
+        data_collator: Optional[DataCollator] = None,
+        model_init: Optional[Callable[[], PreTrainedModel]] = None,
+        callbacks: Optional[list[TrainerCallback]] = None,
+        optimizers: tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR] = (None, None),
+        preprocess_logits_for_metrics: Optional[Callable[[torch.Tensor, torch.Tensor], torch.Tensor]] = None,
+        peft_config: Optional[dict] = None,
+        compute_metrics: Optional[Callable[[EvalLoopOutput], dict]] = None,
+        model_adapter_name: Optional[str] = None,
+        ref_adapter_name: Optional[str] = None,
+        embedding_func: Optional[Callable] = None,
+        embedding_tokenizer: Optional[PreTrainedTokenizerBase] = None,
+    ):
+        if embedding_func is not None and not (is_sklearn_available() and is_joblib_available()):
+            raise ImportError(
+                "BCOTrainer with UDM requires the scikit-learn and joblib libraries. Please install it with `pip install scikit-learn joblib`."
+            )
+
+        if type(args) is TrainingArguments:
+            raise ValueError("Please use `BCOConfig` instead `TrainingArguments`.")
+
+        if not isinstance(model, str) and model is not None and ref_model is model:
+            raise ValueError(
+                "`model` and `ref_model` cannot be the same object. If you want `ref_model` to be the "
+                "same as `model`, you must mass a copy of it, or `None` if you use peft."
+            )
+
+        if args.model_init_kwargs is None:
+            model_init_kwargs = {}
+        elif not isinstance(model, str):
+            raise ValueError("You passed model_kwargs to the BCOTrainer. But your model is already instantiated.")
+        else:
+            model_init_kwargs = args.model_init_kwargs
+            torch_dtype = model_init_kwargs.get("torch_dtype")
+            if torch_dtype is not None:
+                # Convert to `torch.dtype` if an str is passed
+                if isinstance(torch_dtype, str) and torch_dtype != "auto":
+                    torch_dtype = getattr(torch, torch_dtype)
+                if torch_dtype != "auto" and not isinstance(torch_dtype, torch.dtype):
+                    raise ValueError(
+                        f"Invalid `torch_dtype` passed to the BCOConfig. Expected a string with either `torch.dtype` or 'auto', but got {torch_dtype}."
+                    )
+                model_init_kwargs["torch_dtype"] = torch_dtype
+
+        if args.ref_model_init_kwargs is None:
+            ref_model_init_kwargs = {}
+        elif not isinstance(ref_model, str):
+            raise ValueError(
+                "You passed ref_model_kwargs to the BCOTrainer. But your ref_model is already instantiated."
+            )
+        else:
+            ref_model_init_kwargs = args.ref_model_init_kwargs
+            torch_dtype = ref_model_init_kwargs.get("torch_dtype")
+            if torch_dtype is not None:
+                # Convert to `torch.dtype` if an str is passed
+                if isinstance(torch_dtype, str) and torch_dtype != "auto":
+                    torch_dtype = getattr(torch, torch_dtype)
+                if torch_dtype != "auto" and not isinstance(torch_dtype, torch.dtype):
+                    raise ValueError(
+                        f"Invalid `torch_dtype` passed to the BCOConfig. Expected a string with either `torch.dtype` or 'auto', but got {torch_dtype}."
+                    )
+                ref_model_init_kwargs["torch_dtype"] = torch_dtype
+
+        if isinstance(model, str):
+            model = AutoModelForCausalLM.from_pretrained(model, **model_init_kwargs)
+
+        if isinstance(ref_model, str):
+            ref_model = AutoModelForCausalLM.from_pretrained(ref_model, **ref_model_init_kwargs)
+
+        # Initialize this variable to False. This helps tracking the case when `peft_module_casting_to_bf16`
+        # has been called in order to properly call autocast if needed.
+        self._peft_has_been_casted_to_bf16 = False
+
+        if not is_peft_available() and peft_config is not None:
+            raise ValueError(
+                "PEFT is not installed and you passed a `peft_config` in the trainer's kwargs, please install it with `pip install peft` to use the PEFT models"
+            )
+        elif is_peft_available() and peft_config is not None:
+            # if model is a peft model and we have a peft_config, we merge and unload it first
+            if isinstance(model, PeftModel):
+                model = model.merge_and_unload()
+
+            if getattr(model, "is_loaded_in_8bit", False) or getattr(model, "is_loaded_in_4bit", False):
+                _support_gc_kwargs = hasattr(
+                    args, "gradient_checkpointing_kwargs"
+                ) and "gradient_checkpointing_kwargs" in list(
+                    inspect.signature(prepare_model_for_kbit_training).parameters
+                )
+
+                prepare_model_kwargs = {"use_gradient_checkpointing": args.gradient_checkpointing}
+
+                if _support_gc_kwargs:
+                    prepare_model_kwargs["gradient_checkpointing_kwargs"] = args.gradient_checkpointing_kwargs
+
+                model = prepare_model_for_kbit_training(model, **prepare_model_kwargs)
+            elif args.gradient_checkpointing:
+                # For backward compatibility with older versions of transformers
+                if hasattr(model, "enable_input_require_grads"):
+                    model.enable_input_require_grads()
+                else:
+
+                    def make_inputs_require_grad(module, input, output):
+                        output.requires_grad_(True)
+
+                    model.get_input_embeddings().register_forward_hook(make_inputs_require_grad)
+
+            # get peft model with the given config
+            model = model
+            if args.bf16 and getattr(model, "is_loaded_in_4bit", False):
+                peft_module_casting_to_bf16(model)
+                # If args.bf16 we need to explicitly call `generate` with torch amp autocast context manager
+                self._peft_has_been_casted_to_bf16 = True
+
+        # For models that use gradient_checkpointing, we need to attach a hook that enables input
+        # to explicitly have `requires_grad=True`, otherwise training will either silently
+        # fail or completely fail.
+        elif args.gradient_checkpointing:
+            # For backward compatibility with older versions of transformers
+            if hasattr(model, "enable_input_require_grads"):
+                model.enable_input_require_grads()
+            else:
+
+                def make_inputs_require_grad(module, input, output):
+                    output.requires_grad_(True)
+
+                model.get_input_embeddings().register_forward_hook(make_inputs_require_grad)
+
+        if args.generate_during_eval and not (is_wandb_available() or is_comet_available()):
+            raise ValueError(
+                "`generate_during_eval=True` requires Weights and Biases or Comet to be installed."
+                " Please install `wandb` or `comet-ml` to resolve."
+            )
+
+        if model is not None:
+            self.is_encoder_decoder = model.config.is_encoder_decoder
+        elif args.is_encoder_decoder is None:
+            raise ValueError("When no model is provided, you need to pass the parameter is_encoder_decoder.")
+        else:
+            self.is_encoder_decoder = args.is_encoder_decoder
+
+        self.is_peft_model = is_peft_available() and isinstance(model, PeftModel)
+        self.model_adapter_name = model_adapter_name
+        self.ref_adapter_name = ref_adapter_name
+
+        if ref_model:
+            self.ref_model = ref_model
+        elif self.is_peft_model or args.precompute_ref_log_probs:
+            # The `model` with adapters turned off will be used as the reference model
+            self.ref_model = None
+        else:
+            self.ref_model = create_reference_model(model)
+
+        if processing_class is None:
+            raise ValueError(
+                "max_length or a processing_class must be specified when using the default DPODataCollatorWithPadding"
+            )
+        if args.max_length is None:
+            warnings.warn(
+                "When using DPODataCollatorWithPadding, you should set `max_length` in the `BCOConfig`. "
+                "It will be set to `512` by default, but you should do it yourself in the future.",
+                UserWarning,
+            )
+            max_length = 512
+        if args.max_length is not None:
+            max_length = args.max_length
+
+        if args.max_prompt_length is None:
+            warnings.warn(
+                "When using DPODataCollatorWithPadding, you should set `max_prompt_length` in the `BCOConfig`. "
+                "It will be set to `128` by default, but you should do it yourself in the future.",
+                UserWarning,
+            )
+            max_prompt_length = 128
+        if args.max_prompt_length is not None:
+            max_prompt_length = args.max_prompt_length
+
+        max_completion_length = None
+        if args.max_completion_length is None and self.is_encoder_decoder:
+            warnings.warn(
+                "When using DPODataCollatorWithPadding with an encoder decoder architecture, you should set `max_completion_length` in the BCOTrainer's init"
+                " it will be set to `128` by default, but you should do it yourself in the future.",
+                UserWarning,
+            )
+            max_completion_length = 128
+        if args.max_completion_length is not None and self.is_encoder_decoder:
+            max_completion_length = args.max_completion_length
+
+        if data_collator is None:
+            data_collator = DPODataCollatorWithPadding(
+                pad_token_id=processing_class.pad_token_id,
+                label_pad_token_id=args.label_pad_token_id,
+                is_encoder_decoder=self.is_encoder_decoder,
+            )
+
+            if args.remove_unused_columns:
+                args.remove_unused_columns = False
+                # warn users
+                warnings.warn(
+                    "When using DPODataCollatorWithPadding, you should set `remove_unused_columns=False` in your BCOConfig"
+                    " we have set it for you, but you should do it yourself in the future.",
+                    UserWarning,
+                )
+
+            self.use_dpo_data_collator = True
+        else:
+            self.use_dpo_data_collator = False
+
+        # Disable dropout in the model and reference model
+        if args.disable_dropout:
+            disable_dropout_in_model(model)
+            if self.ref_model is not None:
+                disable_dropout_in_model(self.ref_model)
+
+        self.max_length = max_length
+        self.generate_during_eval = args.generate_during_eval
+        self.label_pad_token_id = args.label_pad_token_id
+        self.padding_value = args.padding_value if args.padding_value is not None else processing_class.pad_token_id
+        self.max_prompt_length = max_prompt_length
+        self.truncation_mode = args.truncation_mode
+        self.max_completion_length = max_completion_length
+        self.precompute_ref_log_probs = args.precompute_ref_log_probs
+
+        # Since ref_logs are precomputed on the first call to get_train/eval_dataloader
+        # keep track of first called to avoid computation of future calls
+        self._precomputed_train_ref_log_probs = False
+        self._precomputed_eval_ref_log_probs = False
+
+        # metric
+        self._stored_metrics = defaultdict(lambda: defaultdict(list))
+
+        # BCO parameter
+        self.beta = args.beta
+        self.aux_loss_enabled = getattr(model.config, "output_router_logits", False)
+        self.aux_loss_coef = getattr(model.config, "router_aux_loss_coef", 0.0)
+        if self.aux_loss_enabled and self.aux_loss_coef == 0.0:
+            warnings.warn(
+                "You set `output_router_logits` to `True` in the model config, but `router_aux_loss_coef` is set to "
+                "`0.0`, meaning the auxiliary loss will not be used. Either set `router_aux_loss_coef` to a value "
+                "greater than `0.0`, or set `output_router_logits` to `False` if you don't want to use the auxiliary "
+                "loss.",
+                UserWarning,
+            )
+
+        # Underlying Distribution Matching argument
+        self.embedding_func = embedding_func
+        self.embedding_tokenizer = embedding_tokenizer
+
+        # The trainer estimates the number of FLOPs [floating-point operations] using the number of elements in the
+        # input tensor associated with the key "input_ids". However, in BCO, the sampled data does not include the
+        # "input_ids" key. Instead, the available keys are "prompt_input_ids" and "completion_input_ids". As a result,
+        # the trainer issues the warning: "Could not estimate the number of tokens of the input, floating-point
+        # operations will not be computed." To suppress this warning, we set the "estimate_tokens" key in the model's
+        # "warnings_issued" dictionary to True. This acts as a flag to indicate that the warning has already been
+        # issued.
+        model.warnings_issued["estimate_tokens"] = True
+
+        with PartialState().main_process_first():
+            # Apply the chat template if needed
+            train_dataset = train_dataset.map(
+                maybe_apply_chat_template, fn_kwargs={"tokenizer": processing_class}, num_proc=args.dataset_num_proc
+            )
+            if eval_dataset is not None:
+                eval_dataset = eval_dataset.map(
+                    maybe_apply_chat_template,
+                    fn_kwargs={"tokenizer": processing_class},
+                    num_proc=args.dataset_num_proc,
+                )
+
+            # Tokenize and prepare the training datasets
+            train_dataset = train_dataset.map(
+                _tokenize,
+                batched=True,
+                fn_kwargs={"tokenizer": processing_class, "embedding_tokenizer": self.embedding_tokenizer},
+                num_proc=args.dataset_num_proc,
+                desc="Tokenizing train dataset",
+            )
+
+            # Prepare the datasets
+            fn_kwargs = {
+                "prefix": "",
+                "is_encoder_decoder": self.is_encoder_decoder,
+                "tokenizer": processing_class,
+                "max_length": self.max_length,
+                "truncation_mode": self.truncation_mode,
+                "label_pad_token_id": self.label_pad_token_id,
+                "max_prompt_length": self.max_prompt_length,
+                "max_completion_length": self.max_completion_length,
+            }
+            train_dataset = train_dataset.map(
+                _process_tokens,
+                fn_kwargs=fn_kwargs,
+                num_proc=args.dataset_num_proc,
+                desc="Processing tokenized train dataset",
+            )
+
+            if eval_dataset is not None:
+                # Tokenize
+                eval_dataset = eval_dataset.map(
+                    _tokenize,
+                    fn_kwargs={"tokenizer": processing_class, "embedding_tokenizer": self.embedding_tokenizer},
+                    batched=True,
+                    num_proc=args.dataset_num_proc,
+                    desc="Tokenizing eval dataset",
+                )
+
+                # Process
+                fn_kwargs = {
+                    "prefix": "",
+                    "is_encoder_decoder": self.is_encoder_decoder,
+                    "tokenizer": processing_class,
+                    "max_length": self.max_length,
+                    "truncation_mode": self.truncation_mode,
+                    "label_pad_token_id": self.label_pad_token_id,
+                    "max_prompt_length": self.max_prompt_length,
+                    "max_completion_length": self.max_completion_length,
+                }
+                eval_dataset = eval_dataset.map(
+                    _process_tokens,
+                    fn_kwargs=fn_kwargs,
+                    num_proc=args.dataset_num_proc,
+                    desc="Processing tokenized eval dataset",
+                )
+
+            desirable = train_dataset.filter(
+                lambda x: x["label"], num_proc=args.dataset_num_proc, desc="Filtering desirable examples"
+            )
+            undesirable = train_dataset.filter(
+                lambda x: not x["label"], num_proc=args.dataset_num_proc, desc="Filtering undesirable examples"
+            )
+
+        super().__init__(
+            model=model,
+            args=args,
+            data_collator=data_collator,
+            train_dataset=train_dataset,
+            eval_dataset=eval_dataset,
+            processing_class=processing_class,
+            model_init=model_init,
+            compute_metrics=compute_metrics,
+            callbacks=callbacks,
+            optimizers=optimizers,
+            preprocess_logits_for_metrics=preprocess_logits_for_metrics,
+        )
+
+        # Gradient accumulation requires scaled loss. Normally, loss scaling in the parent class depends on whether the
+        # model accepts loss-related kwargs. Since we compute our own loss, this check is irrelevant. We set
+        # self.model_accepts_loss_kwargs to False to enable scaling.
+        self.model_accepts_loss_kwargs = False
+
+        # Add tags for models that have been loaded with the correct transformers version
+        if hasattr(self.model, "add_model_tags"):
+            self.model.add_model_tags(self._tag_names)
+
+        if not hasattr(self, "accelerator"):
+            raise AttributeError(
+                "Your `Trainer` does not have an `accelerator` object. Consider upgrading `transformers`."
+            )
+
+        # Deepspeed Zero-3 does not support precompute_ref_log_probs
+        if self.is_deepspeed_enabled:
+            if self.accelerator.state.deepspeed_plugin.zero_stage == 3 and self.precompute_ref_log_probs:
+                raise ValueError(
+                    "You cannot use `precompute_ref_log_probs=True` with Deepspeed ZeRO-3. Please set `precompute_ref_log_probs=False`."
+                )
+
+        if self.ref_model is None:
+            if not (self.is_peft_model or self.precompute_ref_log_probs):
+                raise ValueError(
+                    "No reference model and model is not a Peft model. Try setting `precompute_ref_log_probs=True`"
+                )
+        else:
+            if self.is_deepspeed_enabled:
+                self.ref_model = prepare_deepspeed(self.ref_model, self.accelerator)
+            else:
+                self.ref_model = self.accelerator.prepare_model(self.ref_model, evaluation_mode=True)
+
+        self.running = RunningMoments(accelerator=self.accelerator)
+
+        if self.embedding_func is None or args.resume_from_checkpoint:
+            return
+
+        chosen_embeddings = self._get_sample_prompt_embeddings(desirable, sample_size=self.args.prompt_sample_size)
+        rejected_embeddings = self._get_sample_prompt_embeddings(undesirable, sample_size=self.args.prompt_sample_size)
+
+        embeddings = torch.cat((chosen_embeddings, rejected_embeddings), dim=0)
+        labels = torch.cat(
+            (torch.ones_like(chosen_embeddings[:, 0]), torch.zeros_like(rejected_embeddings[:, 0])), dim=0
+        )
+
+        self.clf = LogisticRegression(class_weight="balanced").fit(
+            embeddings.cpu().float().numpy(), labels.cpu().numpy()
+        )
+        chosen_mean = self.clf.score(
+            chosen_embeddings.cpu().float().numpy(), torch.ones_like(chosen_embeddings[:, 0]).cpu().numpy()
+        )
+        rejected_mean = self.clf.score(
+            rejected_embeddings.cpu().float().numpy(), torch.zeros_like(rejected_embeddings[:, 0]).cpu().numpy()
+        )
+        logger.info(f"UDM classifier training scores: chosen: {chosen_mean}, rejected: {rejected_mean}")
+
+    @property
+    def match_underlying_distribution(self):
+        return self.embedding_func is not None and self.embedding_tokenizer is not None
+
+    def _get_chosen_prob(self, prompt_embeddings: torch.FloatTensor) -> torch.FloatTensor:
+        """
+        Calculates the probability if the given prompt embedding is from desirable dataset. This function calculates
+        the probability in the process and ensemble across processes.
+        """
+        dtype = prompt_embeddings.dtype
+        device = prompt_embeddings.device
+        rank = self.accelerator.process_index
+
+        padded_prompt_embeddings = self.accelerator.pad_across_processes(
+            prompt_embeddings, pad_index=self.embedding_tokenizer.pad_token_id
+        )
+        sample_size = padded_prompt_embeddings.shape[0]
+        nonzero = padded_prompt_embeddings.mean(dim=1) != self.embedding_tokenizer.pad_token_id
+        prompt_embeddings = self.accelerator.gather(padded_prompt_embeddings)
+
+        # cannot predict for all empty values
+        if prompt_embeddings.shape[0] == 0:
+            return torch.tensor([], device=device, dtype=dtype)
+
+        prob = self.clf.predict_proba(prompt_embeddings.cpu().float().numpy())[:, 1]
+        prob = torch.as_tensor(prob, dtype=dtype, device=device)
+        prob = self.accelerator.reduce(prob, reduction="mean")
+
+        prob = prob[sample_size * rank : sample_size * (rank + 1)]
+        prob = prob[nonzero]
+
+        return prob
+
+    def _vectorize_prompt(self, input_ids: torch.LongTensor, attention_mask: torch.LongTensor) -> torch.FloatTensor:
+        """
+        Replaces processing_class.pad_token_id to embedding_tokenizer.pad_token_id and applies self.embedding_func
+        """
+        input_ids = torch.where(
+            input_ids == self.processing_class.pad_token_id,
+            self.embedding_tokenizer.pad_token_id,
+            input_ids,
+        )
+
+        with torch.no_grad():
+            embeddings = self.embedding_func(
+                input_ids=input_ids,
+                attention_mask=attention_mask,
+            )
+
+        return embeddings
+
+    def _get_prompt_embeddings(
+        self, batch: dict[str, Union[list, torch.LongTensor]]
+    ) -> tuple[torch.FloatTensor, torch.FloatTensor]:
+        """Extract embeddings from frozen embedding model"""
+
+        if not self.match_underlying_distribution:
+            return None, None
+
+        embeddings = self._vectorize_prompt(
+            input_ids=batch["embedding_input_ids"],
+            attention_mask=batch["embedding_attention_mask"],
+        )
+
+        labels = torch.tensor(batch["label"], dtype=torch.bool, device=embeddings.device)
+        chosen_idx = torch.where(labels)[0]
+        rejected_idx = torch.where(~labels)[0]
+
+        chosen_embeddings = embeddings[chosen_idx, ...]
+        rejected_embeddings = embeddings[rejected_idx, ...]
+
+        return (chosen_embeddings, rejected_embeddings)
+
+    def _get_sample_prompt_embeddings(self, dataset: Dataset, sample_size: int = 512) -> torch.FloatTensor:
+        """
+        Sample instances from dataset and get prompt embeddings. Used for density ratio classifier training.
+        """
+        n_samples = min(len(dataset), sample_size)
+        rand_indices = np.random.choice(len(dataset), size=(n_samples,))
+
+        embedding_dataset = dataset.select(rand_indices)
+
+        dataloader_params = {
+            "batch_size": self.args.per_device_train_batch_size,
+            "collate_fn": self.data_collator,
+            "num_workers": self.args.dataloader_num_workers,
+            "pin_memory": self.args.dataloader_pin_memory,
+            "shuffle": False,
+        }
+
+        # prepare dataloader
+        data_loader = self.accelerator.prepare(DataLoader(embedding_dataset, **dataloader_params))
+
+        with torch.no_grad():
+            all_embeddings = torch.empty(0)
+            for padded_batch in tqdm(iterable=data_loader, desc="Building sample prompt embeddings"):
+                embeddings = self._vectorize_prompt(
+                    input_ids=padded_batch["embedding_input_ids"],
+                    attention_mask=padded_batch["embedding_attention_mask"],
+                )
+                embeddings = self.accelerator.gather_for_metrics(embeddings)
+                all_embeddings = torch.cat((all_embeddings, embeddings.cpu()))
+
+        return all_embeddings
+
+    def _save_optimizer_and_scheduler(self, output_dir):
+        output_dir = output_dir if output_dir is not None else self.args.output_dir
+        super()._save_optimizer_and_scheduler(output_dir)
+
+        if self.accelerator.is_main_process:
+            # When saving optimizer and scheduler to checkpoint, save also the running delta object.
+            self.running.save_to_json(os.path.join(output_dir, RUNNING_NAME))
+
+            if self.match_underlying_distribution:
+                joblib.dump(self.clf, os.path.join(output_dir, CLF_NAME), compress=True)
+
+    def _load_optimizer_and_scheduler(self, checkpoint):
+        if checkpoint is None:
+            logger.warning_once(f"Missing Checkpoint {checkpoint}")
+            return
+
+        super()._load_optimizer_and_scheduler(checkpoint)
+
+        # when loading optimizer and scheduler from checkpoint, also load the running delta object.
+        running_file = os.path.join(checkpoint, RUNNING_NAME)
+        if os.path.isfile(running_file):
+            self.running = RunningMoments.load_from_json(self.accelerator, running_file)
+
+        if self.match_underlying_distribution:
+            clf_file = os.path.join(checkpoint, CLF_NAME)
+            if os.path.isfile(clf_file):
+                self.clf = joblib.load(clf_file)
+
+    @contextmanager
+    def null_ref_context(self):
+        """Context manager for handling null reference model (that is, peft adapter manipulation)."""
+        with (
+            self.accelerator.unwrap_model(self.model).disable_adapter()
+            if self.is_peft_model and not self.ref_adapter_name
+            else nullcontext()
+        ):
+            if self.ref_adapter_name:
+                self.model.set_adapter(self.ref_adapter_name)
+            yield
+            if self.ref_adapter_name:
+                self.model.set_adapter(self.model_adapter_name or "default")
+
+    def get_train_dataloader(self) -> DataLoader:
+        """
+        Returns the training [`~torch.utils.data.DataLoader`].
+
+        Subclass of transformers.src.transformers.trainer.get_train_dataloader to precompute `ref_log_probs`.
+        """
+
+        if self.precompute_ref_log_probs and not self._precomputed_train_ref_log_probs:
+            dataloader_params = {
+                "batch_size": self.args.per_device_train_batch_size,
+                "collate_fn": self.data_collator,
+                "num_workers": self.args.dataloader_num_workers,
+                "pin_memory": self.args.dataloader_pin_memory,
+                "shuffle": False,
+            }
+
+            # prepare dataloader
+            data_loader = self.accelerator.prepare(DataLoader(self.train_dataset, **dataloader_params))
+            reference_completion_logps = []
+
+            for padded_batch in tqdm(iterable=data_loader, desc="Train dataset reference log probs"):
+                reference_completion_logp = self.compute_reference_log_probs(padded_batch)
+
+                reference_completion_logp = self.accelerator.gather_for_metrics(reference_completion_logp)
+                reference_completion_logps.append(reference_completion_logp.cpu())
+
+            self.train_dataset = self.train_dataset.add_column(
+                name="reference_logps", column=torch.cat(reference_completion_logps).float().numpy()
+            )
+
+            self._precomputed_train_ref_log_probs = True
+
+        return super().get_train_dataloader()
+
+    def get_eval_dataloader(self, eval_dataset: Optional[Dataset] = None) -> DataLoader:
+        """
+        Returns the evaluation [`~torch.utils.data.DataLoader`].
+
+        Subclass of transformers.src.transformers.trainer.get_eval_dataloader to precompute `ref_log_probs`.
+
+        Args:
+            eval_dataset (`torch.utils.data.Dataset`, *optional*):
+                If provided, will override `self.eval_dataset`. If it is a [`~datasets.Dataset`], columns not accepted
+                by the `model.forward()` method are automatically removed. It must implement `__len__`.
+        """
+        if eval_dataset is None and self.eval_dataset is None:
+            raise ValueError("Trainer: evaluation requires an eval_dataset.")
+        eval_dataset = eval_dataset if eval_dataset is not None else self.eval_dataset
+
+        if self.precompute_ref_log_probs and not self._precomputed_eval_ref_log_probs:
+            dataloader_params = {
+                "batch_size": self.args.per_device_eval_batch_size,
+                "collate_fn": self.data_collator,
+                "num_workers": self.args.dataloader_num_workers,
+                "pin_memory": self.args.dataloader_pin_memory,
+                "shuffle": False,
+            }
+
+            # prepare dataloader
+            data_loader = self.accelerator.prepare(DataLoader(eval_dataset, **dataloader_params))
+
+            reference_completion_logps = []
+
+            for padded_batch in tqdm(iterable=data_loader, desc="Eval dataset reference log probs"):
+                reference_completion_logp = self.compute_reference_log_probs(padded_batch)
+
+                reference_completion_logp = self.accelerator.gather_for_metrics(reference_completion_logp)
+                reference_completion_logps.append(reference_completion_logp.cpu())
+
+            eval_dataset = eval_dataset.add_column(
+                name="reference_logps", column=torch.cat(reference_completion_logps).float().numpy()
+            )
+
+            # Save calculated reference_chosen_logps and reference_rejected_logps to the eval_dataset for subsequent runs
+            if self.eval_dataset is not None:
+                self.eval_dataset = eval_dataset
+            self._precomputed_eval_ref_log_probs = True
+
+        return super().get_eval_dataloader(eval_dataset=eval_dataset)
+
+    def compute_reference_log_probs(self, padded_batch: dict) -> dict:
+        """Computes log probabilities of the reference model for a single padded batch of a BCO specific dataset."""
+        with torch.no_grad():
+            if self.ref_model is None:
+                with self.null_ref_context():
+                    if self.is_encoder_decoder:
+                        completion_logits = self.model(
+                            padded_batch["prompt_input_ids"],
+                            attention_mask=padded_batch["prompt_attention_mask"],
+                            decoder_input_ids=padded_batch.get("completion_decoder_input_ids"),
+                            labels=padded_batch["completion_labels"],
+                        ).logits
+
+                    else:
+                        completion_logits = self.model(
+                            padded_batch["completion_input_ids"],
+                            attention_mask=padded_batch["completion_attention_mask"],
+                        ).logits
+
+            else:
+                if self.is_encoder_decoder:
+                    completion_logits = self.ref_model(
+                        padded_batch["prompt_input_ids"],
+                        attention_mask=padded_batch["prompt_attention_mask"],
+                        decoder_input_ids=padded_batch.get("completion_decoder_input_ids"),
+                        labels=padded_batch["completion_labels"],
+                    ).logits
+
+                else:
+                    completion_logits = self.ref_model(
+                        padded_batch["completion_input_ids"], attention_mask=padded_batch["completion_attention_mask"]
+                    ).logits
+
+        completion_logps = self.get_batch_logps(
+            completion_logits,
+            padded_batch["completion_labels"],
+            average_log_prob=False,
+            is_encoder_decoder=self.is_encoder_decoder,
+            label_pad_token_id=self.label_pad_token_id,
+        )
+
+        return completion_logps
+
+    @staticmethod
+    def get_batch_logps(
+        logits: torch.FloatTensor,
+        labels: torch.LongTensor,
+        average_log_prob: bool = False,
+        label_pad_token_id: int = -100,
+        is_encoder_decoder: bool = False,
+    ) -> torch.FloatTensor:
+        """Compute the log probabilities of the given labels under the given logits.
+
+        Args:
+            logits: Logits of the model (unnormalized). Shape: (batch_size, sequence_length, vocab_size)
+            labels:
+                Labels for which to compute the log probabilities. Label tokens with a value of label_pad_token_id are
+                ignored. Shape: (batch_size, sequence_length)
+            average_log_prob:
+                If True, return the average log probability per (non-masked) token. Otherwise, return the sum of the
+                log probabilities of the (non-masked) tokens.
+
+        Returns:
+            A tensor of shape (batch_size,) containing the average/sum log probabilities of the given labels under the
+            given logits.
+        """
+        if logits.shape[:-1] != labels.shape:
+            raise ValueError("Logits (batch and sequence length dim) and labels must have the same shape.")
+
+        if not is_encoder_decoder:
+            labels = labels[:, 1:].clone()
+            logits = logits[:, :-1, :]
+        else:
+            # Fixes end-dec RuntimeError
+            labels = labels.clone()
+
+        loss_mask = labels != label_pad_token_id
+
+        # dummy token; we'll ignore the losses on these tokens later
+        labels[labels == label_pad_token_id] = 0
+
+        per_token_logps = selective_log_softmax(logits, labels)
+
+        if average_log_prob:
+            return (per_token_logps * loss_mask).sum(-1) / loss_mask.sum(-1)
+        else:
+            return (per_token_logps * loss_mask).sum(-1)
+
+    def forward(
+        self, model: nn.Module, batch: dict[str, Union[list, torch.LongTensor]]
+    ) -> tuple[torch.FloatTensor, torch.FloatTensor, torch.FloatTensor, torch.FloatTensor]:
+        model_kwargs = (
+            {
+                "labels": batch["completion_labels"],
+                "decoder_input_ids": batch.get("completion_decoder_input_ids"),
+            }
+            if self.is_encoder_decoder
+            else {}
+        )
+        if self.aux_loss_enabled:
+            model_kwargs["output_router_logits"] = True
+
+        outputs = model(
+            batch["completion_input_ids"],
+            attention_mask=batch["completion_attention_mask"],
+            **model_kwargs,
+        )
+        completion_logits = outputs.logits
+
+        completion_logps = self.get_batch_logps(
+            completion_logits,
+            batch["completion_labels"],
+            average_log_prob=False,
+            is_encoder_decoder=self.is_encoder_decoder,
+            label_pad_token_id=self.label_pad_token_id,
+        )
+
+        if completion_logps.shape[0] != len(batch["label"]):
+            raise ValueError(
+                "There is a mismatch between the number of examples in this batch and the number of "
+                "examples for which an output sequence was predicted."
+            )
+
+        chosen_idx = [i for i in range(completion_logps.shape[0]) if batch["label"][i] is True]
+        rejected_idx = [i for i in range(completion_logps.shape[0]) if batch["label"][i] is False]
+
+        chosen_logps = completion_logps[chosen_idx, ...]
+        rejected_logps = completion_logps[rejected_idx, ...]
+
+        chosen_logits = completion_logits[chosen_idx, ...]
+        rejected_logits = completion_logits[rejected_idx, ...]
+
+        if self.aux_loss_enabled:
+            return (chosen_logps, rejected_logps, chosen_logits, rejected_logits, outputs.aux_loss)
+        else:
+            return (chosen_logps, rejected_logps, chosen_logits, rejected_logits)
+
+    def _get_udm_weight(self, rejected_embeddings: torch.FloatTensor) -> torch.FloatTensor:
+        prob_desirable = self._get_chosen_prob(rejected_embeddings)
+        min_ratio = self.args.min_density_ratio
+        max_ratio = self.args.max_density_ratio
+
+        weight = (prob_desirable / (1 - prob_desirable + 1e-8)).clamp(min=min_ratio, max=max_ratio)
+
+        return weight
+
+    def bco_loss(
+        self,
+        policy_chosen_logps: torch.FloatTensor,
+        policy_rejected_logps: torch.FloatTensor,
+        reference_chosen_logps: torch.FloatTensor,
+        reference_rejected_logps: torch.FloatTensor,
+        chosen_embeddings: Optional[torch.FloatTensor],
+        rejected_embeddings: Optional[torch.FloatTensor],
+        do_train: bool = True,
+    ) -> tuple[torch.FloatTensor, torch.FloatTensor, torch.FloatTensor, torch.FloatTensor]:
+        """Compute the BCO loss for a batch of policy and reference model log probabilities.
+
+        Args:
+            policy_chosen_logps:
+                Log probabilities of the policy model for the chosen responses. Shape: (num(chosen) in batch_size,)
+            policy_rejected_logps:
+                Log probabilities of the policy model for the rejected responses. Shape: (num(rejected) in batch_size,)
+            reference_chosen_logps:
+                Log probabilities of the reference model for the chosen responses. Shape: (num(chosen) in batch_size,)
+            reference_rejected_logps:
+                Log probabilities of the reference model for the rejected responses. Shape: (num(rejected) in
+                batch_size,)
+            chosen_embeddings: embeddings of desirable prompts
+            rejected_embeddings: embeddings of undesirable prompts
+
+        Returns:
+            A tuple of four tensors: (losses, chosen_rewards, rejected_rewards, delta). The losses tensor contains the
+            BCO loss for each example in the batch. The chosen_rewards and rejected_rewards tensors contain the rewards
+            for the chosen and rejected responses, respectively. The delta value contains the moving average of all
+            implicit rewards.
+        """
+
+        chosen_logratios = policy_chosen_logps - reference_chosen_logps
+        chosen_rewards = self.beta * chosen_logratios
+
+        rejected_logratios = policy_rejected_logps - reference_rejected_logps
+        rejected_rewards = self.beta * rejected_logratios
+
+        if do_train:
+            self.running.update(torch.cat((chosen_rewards, rejected_rewards), 0).detach())
+        delta = torch.as_tensor(self.running.mean, device=chosen_rewards.device)
+
+        chosen_losses = -F.logsigmoid(chosen_rewards - delta)
+        rejected_losses = -F.logsigmoid(-(rejected_rewards - delta))
+
+        if self.match_underlying_distribution:
+            chosen_weight = torch.ones_like(chosen_losses)
+            rejected_weight = self._get_udm_weight(rejected_embeddings)
+
+            losses = torch.cat((chosen_weight * chosen_losses, rejected_weight * rejected_losses), dim=0)
+        else:
+            losses = torch.cat((chosen_losses, rejected_losses), dim=0)
+
+        return losses, chosen_rewards, rejected_rewards, delta
+
+    def get_batch_loss_metrics(
+        self,
+        model,
+        batch: dict[str, Union[list, torch.LongTensor]],
+        do_train: bool = True,
+    ):
+        """Compute the BCO loss and other metrics for the given batch of inputs for train or test."""
+        metrics = {}
+        batch = {k: (v.to(self.accelerator.device) if isinstance(v, torch.Tensor) else v) for k, v in batch.items()}
+
+        forward_output = self.forward(model, batch)
+        (
+            policy_chosen_logps,
+            policy_rejected_logps,
+            policy_chosen_logits,
+            policy_rejected_logits,
+        ) = forward_output[:4]
+        if self.aux_loss_enabled:
+            aux_loss = forward_output[4]
+
+        # if reference_logps in batch use them, otherwise use the reference model
+        if "reference_logps" in batch:
+            chosen_idx = [i for i in range(batch["reference_logps"].shape[0]) if batch["label"][i] is True]
+            rejected_idx = [i for i in range(batch["reference_logps"].shape[0]) if batch["label"][i] is False]
+
+            reference_chosen_logps = batch["reference_logps"][chosen_idx, ...]
+            reference_rejected_logps = batch["reference_logps"][rejected_idx, ...]
+        else:
+            with torch.no_grad():
+                if self.ref_model is None:
+                    with self.null_ref_context():
+                        (
+                            reference_chosen_logps,
+                            reference_rejected_logps,
+                            _,
+                            _,
+                        ) = self.forward(self.model, batch)[:4]
+                else:
+                    (
+                        reference_chosen_logps,
+                        reference_rejected_logps,
+                        _,
+                        _,
+                    ) = self.forward(self.ref_model, batch)[:4]
+
+        chosen_embeddings, rejected_embeddings = self._get_prompt_embeddings(batch)
+
+        losses, chosen_rewards, rejected_rewards, delta = self.bco_loss(
+            policy_chosen_logps,
+            policy_rejected_logps,
+            reference_chosen_logps,
+            reference_rejected_logps,
+            chosen_embeddings,
+            rejected_embeddings,
+            do_train=do_train,
+        )
+        metrics["delta"] = self.accelerator.gather_for_metrics(delta).mean().item()
+
+        num_chosen = torch.Tensor([len(chosen_rewards)]).to(self.accelerator.device)
+        num_rejected = torch.Tensor([len(rejected_rewards)]).to(self.accelerator.device)
+
+        all_num_chosen = self.accelerator.gather_for_metrics(num_chosen).sum().item()
+        all_num_rejected = self.accelerator.gather_for_metrics(num_rejected).sum().item()
+
+        if all_num_chosen > 0:
+            metrics["rewards/chosen_sum"] = (
+                self.accelerator.gather_for_metrics(chosen_rewards.nansum()).nansum().item()
+            )
+            metrics["logps/chosen_sum"] = (
+                self.accelerator.gather_for_metrics(policy_chosen_logps.nansum()).nansum().item()
+            )
+            metrics["logits/chosen_sum"] = (
+                self.accelerator.gather_for_metrics(policy_chosen_logits.nansum()).nansum().item()
+            )
+            metrics["count/chosen"] = all_num_chosen
+
+        if all_num_rejected > 0:
+            metrics["rewards/rejected_sum"] = (
+                self.accelerator.gather_for_metrics(rejected_rewards.nansum()).nansum().item()
+            )
+            metrics["logps/rejected_sum"] = (
+                self.accelerator.gather_for_metrics(policy_rejected_logps.nansum()).nansum().item()
+            )
+            metrics["logits/rejected_sum"] = (
+                self.accelerator.gather_for_metrics(policy_rejected_logits.nansum()).nansum().item()
+            )
+            metrics["count/rejected"] = all_num_rejected
+
+        loss = losses.nanmean()
+        if self.aux_loss_enabled:
+            loss += self.aux_loss_coef * aux_loss
+
+        return loss, metrics
+
+    def compute_loss(
+        self,
+        model: Union[PreTrainedModel, nn.Module],
+        inputs: dict[str, Union[torch.Tensor, Any]],
+        return_outputs=False,
+        num_items_in_batch=None,
+    ) -> Union[torch.Tensor, tuple[torch.Tensor, dict[str, torch.Tensor]]]:
+        compute_loss_context_manager = (
+            autocast(self.accelerator.device.type) if self._peft_has_been_casted_to_bf16 else nullcontext()
+        )
+
+        with compute_loss_context_manager:
+            loss, metrics = self.get_batch_loss_metrics(model, inputs)
+
+        # Make sure to move the loss to the device the original accumulating loss is at back in the `Trainer` class:
+        loss = loss.to(self.args.device)
+        # force log the metrics
+        if self.accelerator.is_main_process:
+            self.store_metrics(metrics, train_eval="train")
+
+        if return_outputs:
+            return (loss, metrics)
+        return loss
+
+    def store_metrics(self, metrics: dict[str, float], train_eval: Literal["train", "eval"] = "train") -> None:
+        for key, value in metrics.items():
+            self._stored_metrics[train_eval][key].append(value)
+
+    def _get_train_sampler(self, dataset: Optional[Dataset] = None) -> Optional[torch.utils.data.Sampler]:
+        if dataset is None:
+            dataset = self.train_dataset
+        if dataset is None or not has_length(dataset):
+            return None
+        return SequentialSampler(dataset)
+
+    def generate_from_model_and_ref(self, model, batch: dict[str, torch.LongTensor]) -> tuple[str, str]:
+        """Generate samples from the model and reference model for the given batch of inputs."""
+
+        # If one uses `generate_during_eval` with peft + bf16, we need to explicitly call generate with
+        # the torch amp context manager as some hidden states are silently casted to full precision.
+        generate_context_manager = (
+            autocast(self.accelerator.device.type) if self._peft_has_been_casted_to_bf16 else nullcontext()
+        )
+        with generate_context_manager:
+            policy_output = model.generate(
+                input_ids=batch["prompt_input_ids"],
+                attention_mask=batch["prompt_attention_mask"],
+                max_length=self.max_length,
+                do_sample=True,
+                pad_token_id=self.processing_class.pad_token_id,
+            )
+
+            # if reference_output in batch use that otherwise use the reference model
+            if "reference_output" in batch:
+                reference_output = batch["reference_output"]
+            else:
+                if self.ref_model is None:
+                    with self.null_ref_context():
+                        reference_output = self.model.generate(
+                            input_ids=batch["prompt_input_ids"],
+                            attention_mask=batch["prompt_attention_mask"],
+                            max_length=self.max_length,
+                            do_sample=True,
+                            pad_token_id=self.processing_class.pad_token_id,
+                        )
+                else:
+                    reference_output = self.ref_model.generate(
+                        input_ids=batch["prompt_input_ids"],
+                        attention_mask=batch["prompt_attention_mask"],
+                        max_length=self.max_length,
+                        do_sample=True,
+                        pad_token_id=self.processing_class.pad_token_id,
+                    )
+
+        policy_output = pad_to_length(policy_output, self.max_length, self.processing_class.pad_token_id)
+        policy_output_decoded = self.processing_class.batch_decode(policy_output, skip_special_tokens=True)
+
+        reference_output = pad_to_length(reference_output, self.max_length, self.processing_class.pad_token_id)
+        reference_output_decoded = self.processing_class.batch_decode(reference_output, skip_special_tokens=True)
+
+        return policy_output_decoded, reference_output_decoded
+
+    def prediction_step(
+        self,
+        model: Union[PreTrainedModel, nn.Module],
+        inputs: dict[str, Union[torch.Tensor, Any]],
+        prediction_loss_only: bool,
+        ignore_keys: Optional[list[str]] = None,
+    ):
+        if ignore_keys is None:
+            if hasattr(model, "config"):
+                ignore_keys = getattr(model.config, "keys_to_ignore_at_inference", [])
+            else:
+                ignore_keys = []
+
+        prediction_context_manager = (
+            autocast(self.accelerator.device.type) if self._peft_has_been_casted_to_bf16 else nullcontext()
+        )
+        with torch.no_grad(), prediction_context_manager:
+            loss, metrics = self.get_batch_loss_metrics(model, inputs, do_train=False)
+
+        # force log the metrics
+        if self.accelerator.is_main_process:
+            self.store_metrics(metrics, train_eval="eval")
+
+        if prediction_loss_only:
+            return (loss.detach(), None, None)
+
+        # logits for the chosen and rejected samples from model
+        logits_dict = {}
+        if "logits/chosen_sum" in metrics:
+            logits_dict["eval_logits/chosen"] = metrics["logits/chosen_sum"]
+        if "logits/rejected_sum" in metrics:
+            logits_dict["eval_logits/rejected"] = metrics["logits/rejected_sum"]
+        logits = [v for k, v in logits_dict.items() if k not in ignore_keys]
+        logits = torch.tensor(logits, device=self.accelerator.device)
+        labels = torch.zeros(logits.shape[0], device=self.accelerator.device)
+
+        return (loss.detach(), logits, labels)
+
+    def evaluation_loop(
+        self,
+        dataloader: DataLoader,
+        description: str,
+        prediction_loss_only: Optional[bool] = None,
+        ignore_keys: Optional[list[str]] = None,
+        metric_key_prefix: str = "eval",
+    ) -> EvalLoopOutput:
+        """
+        Overriding built-in evaluation loop to store metrics for each batch. Prediction/evaluation loop, shared by
+        `Trainer.evaluate()` and `Trainer.predict()`.
+
+        Works both with or without labels.
+        """
+
+        # Sample and save to game log if requested (for one batch to save time)
+        if self.generate_during_eval:
+            # Generate random indices within the range of the total number of samples
+            num_samples = len(dataloader.dataset)
+            random_indices = random.sample(range(num_samples), k=self.args.eval_batch_size)
+
+            # Use dataloader.dataset.select to get the random batch without iterating over the DataLoader
+            random_batch_dataset = dataloader.dataset.select(random_indices)
+            random_batch = self.data_collator(random_batch_dataset)
+            random_batch = self._prepare_inputs(random_batch)
+
+            target_labels = torch.tensor(random_batch["label"], dtype=torch.bool, device=self.accelerator.device)
+            target_indicies = torch.where(~target_labels)[0]
+            target_batch = {
+                "prompt_input_ids": random_batch["prompt_input_ids"][target_indicies],
+                "prompt_attention_mask": random_batch["prompt_attention_mask"][target_indicies],
+                "prompt": itemgetter(*target_indicies)(random_batch["prompt"]),
+            }
+            policy_output_decoded, ref_output_decoded = self.generate_from_model_and_ref(self.model, target_batch)
+
+            table = pd.DataFrame(
+                columns=["Prompt", "Policy", "Ref Model"],
+                data=[
+                    [prompt, pol[len(prompt) :], ref[len(prompt) :]]
+                    for prompt, pol, ref in zip(target_batch["prompt"], policy_output_decoded, ref_output_decoded)
+                ],
+            )
+            if "wandb" in self.args.report_to:
+                wandb.log({"game_log": wandb.Table(data=table)})
+
+            if "comet_ml" in self.args.report_to:
+                log_table_to_comet_experiment(
+                    name="game_log.csv",
+                    table=table,
+                )
+
+        # Base evaluation
+        initial_output = super().evaluation_loop(
+            dataloader, description, prediction_loss_only, ignore_keys, metric_key_prefix
+        )
+
+        return initial_output
+
+    def log(self, logs: dict[str, float], start_time: Optional[float] = None) -> None:
+        """
+        Log `logs` on the various objects watching training, including stored metrics.
+
+        Args:
+            logs (`dict[str, float]`):
+                The values to log.
+            start_time (`float` or `None`, *optional*, defaults to `None`):
+                Start time of the training.
+        """
+        # logs either has 'loss' or 'eval_loss'
+        train_eval = "train" if "loss" in logs else "eval"
+        # train metrics should have no prefix, eval should have 'eval_'
+        prefix = "eval_" if train_eval == "eval" else ""
+        # accumulate average metrics from sums and lengths
+        for split in ["chosen", "rejected"]:
+            if f"count/{split}" in self._stored_metrics[train_eval]:
+                count_sum = torch.Tensor(self._stored_metrics[train_eval][f"count/{split}"]).sum().item()
+                for metric in ["rewards", "logps", "logits"]:
+                    logs[f"{prefix}{metric}/{split}"] = (
+                        torch.Tensor(self._stored_metrics[train_eval][f"{metric}/{split}_sum"]).sum().item()
+                        / count_sum
+                    )
+                    # delete obsolete metric
+                    del self._stored_metrics[train_eval][f"{metric}/{split}_sum"]
+                del self._stored_metrics[train_eval][f"count/{split}"]
+        # calculate reward margin
+        if f"{prefix}rewards/chosen" in logs and f"{prefix}rewards/rejected" in logs:
+            logs[f"{prefix}rewards/margins"] = logs[f"{prefix}rewards/chosen"] - logs[f"{prefix}rewards/rejected"]
+        # Add averaged stored metrics to logs
+        for key, metrics in self._stored_metrics[train_eval].items():
+            logs[f"{prefix}{key}"] = torch.Tensor(metrics).mean().item()
+        del self._stored_metrics[train_eval]
+        return super().log(logs, start_time)
+
+    # Ensure the model card is saved along with the checkpoint
+    def _save_checkpoint(self, model, trial):
+        if self.args.hub_model_id is None:
+            model_name = Path(self.args.output_dir).name
+        else:
+            model_name = self.args.hub_model_id.split("/")[-1]
+        self.create_model_card(model_name=model_name)
+        super()._save_checkpoint(model, trial)
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        citation = textwrap.dedent("""\
+        @article{jung2024binary,
+            title        = {{Binary Classifier Optimization for Large Language Model Alignment}},
+            author       = {Seungjae Jung and Gunsoo Han and Daniel Wontae Nam and Kyoung{-}Woon On},
+            year         = 2024,
+            eprint       = {arXiv:2404.04656}
+        }""")
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="BCO",
+            trainer_citation=citation,
+            paper_title="Binary Classifier Optimization for Large Language Model Alignment",
+            paper_id="2404.04656",
+        )
+
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothBCOTrainer(_UnslothBCOTrainer):
+    """
+    
+    Initialize BCOTrainer from [BCO](https://huggingface.co/papers/2404.04656) paper.
+
+    Args:
+        model (`transformers.PreTrainedModel`):
+            The model to train, preferably an `AutoModelForSequenceClassification`.
+        ref_model (`PreTrainedModelWrapper`):
+            Hugging Face transformer model with a casual language modelling head. Used for implicit reward computation
+            and loss. If no reference model is provided, the trainer will create a reference model with the same
+            architecture as the model to be optimized.
+        args (`BCOConfig`):
+            The arguments to use for training.
+        train_dataset (`datasets.Dataset`):
+            The dataset to use for training.
+        eval_dataset (`datasets.Dataset`):
+            The dataset to use for evaluation.
+        processing_class ([`~transformers.PreTrainedTokenizerBase`], [`~transformers.BaseImageProcessor`], [`~transformers.FeatureExtractionMixin`] or [`~transformers.ProcessorMixin`], *optional*, defaults to `None`):
+            Processing class used to process the data. If provided, will be used to automatically process the inputs
+            for the model, and it will be saved along the model to make it easier to rerun an interrupted training or
+            reuse the fine-tuned model.
+        data_collator (`transformers.DataCollator`, *optional*, defaults to `None`):
+            The data collator to use for training. If None is specified, the default data collator
+            (`DPODataCollatorWithPadding`) will be used which will pad the sequences to the maximum length of the
+            sequences in the batch, given a dataset of paired sequences.
+        model_init (`Callable[[], transformers.PreTrainedModel]`):
+            The model initializer to use for training. If None is specified, the default model initializer will be
+            used.
+        callbacks (`list[transformers.TrainerCallback]`):
+            The callbacks to use for training.
+        optimizers (`tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR]`):
+            The optimizer and scheduler to use for training.
+        preprocess_logits_for_metrics (`Callable[[torch.Tensor, torch.Tensor], torch.Tensor]`):
+            The function to use to preprocess the logits before computing the metrics.
+        peft_config (`dict`, defaults to `None`):
+            The PEFT configuration to use for training. If you pass a PEFT configuration, the model will be wrapped in
+            a PEFT model.
+        compute_metrics (`Callable[[EvalPrediction], dict]`, *optional*):
+            The function to use to compute the metrics. Must take a `EvalPrediction` and return a dictionary string to
+            metric values.
+        model_adapter_name (`str`, defaults to `None`):
+            Name of the train target PEFT adapter, when using LoRA with multiple adapters.
+        ref_adapter_name (`str`, defaults to `None`):
+            Name of the reference PEFT adapter, when using LoRA with multiple adapters.
+    
+    """
+    def __init__(
+        self,
+        model = None,
+        ref_model = None,
+        args = None,
+        train_dataset = None,
+        eval_dataset = None,
+        processing_class = None,
+        data_collator = None,
+        model_init = None,
+        callbacks = None,
+        preprocess_logits_for_metrics = None,
+        peft_config = None,
+        compute_metrics = None,
+        model_adapter_name = None,
+        ref_adapter_name = None,
+        embedding_func = None,
+        embedding_tokenizer = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothBCOConfig()
+        use_bf16 = getattr(args, 'bf16', False)
+        if type(use_bf16) is not bool: use_bf16 = False
+        use_fp16 = getattr(args, 'fp16', False)
+        if type(use_fp16) is not bool: use_fp16 = False
+        force_float32 = False
+        if os.environ.get('UNSLOTH_FORCE_FLOAT32', '0') == '1':
+            print('Unsloth: Switching to float32 training since model cannot work with float16')
+            force_float32 = True
+        mixed_precision_dtype = os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32')
+        dtype = getattr(model.config, 'torch_dtype', None)
+        if dtype is None: dtype = model.get_input_embeddings().dtype
+        from unsloth_zoo.utils import _get_dtype
+        dtype = _get_dtype(dtype)
+        float16 = dtype == torch.float16
+        if not force_float32 and (float16 and use_bf16): raise TypeError('Unsloth: Model is in float16 precision but you want to use bfloat16 precision. Set fp16 to `True` and bf16 to `False`')
+        if not force_float32 and (not float16 and use_fp16): raise TypeError('Unsloth: Model is in bfloat16 precision but you want to use float16 precision. Set fp16 to `False` and bf16 to `True`')
+        if force_float32:
+            args.fp16 = False
+            args.bf16 = False
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'no'
+        elif (not use_bf16 and not use_fp16) and mixed_precision_dtype == 'float32':
+            args.fp16 = float16
+            args.bf16 = not float16
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'fp16' if float16 else 'bf16'
+        if getattr(args, 'eval_dataset', None) is not None and getattr(args, 'eval_strategy', 'no') == 'no':
+            args.eval_strategy = 'steps'
+            if getattr(args, 'eval_steps', None) is None: args.eval_steps = 0.1
+        ga_steps = getattr(args, 'gradient_accumulation_steps', None)
+        if ga_steps is not None and ga_steps > 1:
+            from transformers import __version__ as transformers_version
+            if Version(transformers_version) <= Version('4.45.2'):
+                print('**** Unsloth: Please use our fixed gradient_accumulation_steps by updating transformers, TRL and Unsloth!\n'
+                      '`pip install --upgrade --no-cache-dir --force-reinstall --no-deps unsloth transformers trl unsloth_zoo`')
+        if getattr(args, 'eval_strategy', 'no') != 'no':
+            eval_bsz = getattr(args, 'per_device_eval_batch_size', 8)
+            if eval_bsz == 8 and args.per_device_train_batch_size < eval_bsz: args.per_device_eval_batch_size = args.per_device_train_batch_size
+            if getattr(args, 'eval_accumulation_steps', None) is None and ga_steps is not None: args.eval_accumulation_steps = ga_steps
+        fp16_full_eval = getattr(args, 'fp16_full_eval', False)
+        if type(fp16_full_eval) is not bool: fp16_full_eval = False
+        bf16_full_eval = getattr(args, 'bf16_full_eval', False)
+        if type(bf16_full_eval) is not bool: bf16_full_eval = False
+        if args.fp16 and bf16_full_eval: args.bf16_full_eval = False; args.fp16_full_eval = True
+        if args.bf16 and fp16_full_eval: args.bf16_full_eval = True; args.fp16_full_eval = False
+        if force_float32:
+            args.bf16_full_eval = False
+            args.fp16_full_eval = False
+        elif os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32') == 'bfloat16':
+            args.bf16_full_eval = True
+            args.fp16_full_eval = False
+        elif not bf16_full_eval and not fp16_full_eval:
+            args.bf16_full_eval = args.bf16
+            args.fp16_full_eval = args.fp16
+        _output_logits = False
+        if locals().get('compute_metrics', None) is not None: _output_logits = True
+        if locals().get('preprocess_logits_for_metrics', None) is not None: _output_logits = True
+        if _output_logits:
+            os.environ['UNSLOTH_RETURN_LOGITS'] = '1'
+        if 'max_seq_length' not in locals() and not hasattr(args, 'max_seq_length'):
+            pass
+        else:
+            model_max_seq_length = getattr(model, 'max_seq_length', None)
+            args_max_seq_length  = getattr(args,  'max_seq_length', None)
+            if args_max_seq_length is None and model_max_seq_length is not None:
+                max_seq_length = model.max_seq_length
+                if hasattr(args, 'max_seq_length'): args.max_seq_length = max_seq_length
+        if model is not None and hasattr(model, 'for_training'):
+            model.for_training()
+        if 'tokenizer' in locals() and hasattr(tokenizer, 'padding_side'): tokenizer.padding_side = 'right'
+        if 'processing_class' in locals():
+            if hasattr(processing_class, 'padding_side'): processing_class.padding_side = 'right'
+            if hasattr(processing_class, 'tokenizer') and hasattr(processing_class.tokenizer, 'padding_side'): processing_class.tokenizer.padding_side = 'right'
+        __tokenizer = processing_class if 'processing_class' in locals() else tokenizer
+        from unsloth_zoo.vision_utils import UnslothVisionDataCollator
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if isinstance(data_collator, DataCollatorForSeq2Seq) and 'labels' not in train_dataset.column_names:
+                data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False, mlm_probability = 0.0)
+            elif isinstance(data_collator, TransformersDataCollatorForLanguageModeling) and 'labels' in train_dataset.column_names:
+                data_collator = DataCollatorForSeq2Seq(__tokenizer)
+        else:
+            if hasattr(args, 'remove_unused_columns'): args.remove_unused_columns = False
+            if hasattr(args, 'dataset_text_field'): args.dataset_text_field = ''
+            if hasattr(args, 'dataset_kwargs'): args.dataset_kwargs = {'skip_prepare_dataset': True}
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if not hasattr(__tokenizer, 'pad') and hasattr(__tokenizer, 'tokenizer'):
+                if isinstance(data_collator, DataCollatorForSeq2Seq):
+                    data_collator = DataCollatorForSeq2Seq(__tokenizer.tokenizer)
+                else:
+                    data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False, mlm_probability = 0.0)
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('bco_trainer', other_metrics)
+        
+        super().__init__(
+            model = model,
+            ref_model = ref_model,
+            args = args,
+            train_dataset = train_dataset,
+            eval_dataset = eval_dataset,
+            processing_class = processing_class,
+            data_collator = data_collator,
+            model_init = model_init,
+            callbacks = callbacks,
+            preprocess_logits_for_metrics = preprocess_logits_for_metrics,
+            peft_config = peft_config,
+            compute_metrics = compute_metrics,
+            model_adapter_name = model_adapter_name,
+            ref_adapter_name = ref_adapter_name,
+            embedding_func = embedding_func,
+            embedding_tokenizer = embedding_tokenizer,**kwargs)
+        if hasattr(self, 'neftune_hook_handle'):
+            self.neftune_hook_handle.remove()
+            if hasattr(self, 'neftune_hook_handle'): del self.neftune_hook_handle
+        if getattr(args, 'neftune_noise_alpha', None) is not None:
+            model.get_input_embeddings().neftune_noise_alpha = self.neftune_noise_alpha
+        pass
+        if hasattr(self, 'accelerator'):
+            scaler = self.accelerator.scaler
+            current_model = model
+            while hasattr(current_model, 'model'):
+                current_model.accelerator_scaler = scaler
+                current_model = current_model.model
+            current_model.accelerator_scaler = scaler
+        pass
+        
+pass
+
+
+if hasattr(logger, "addFilter"):
+    import logging
+    class HideLoggingMessage(logging.Filter):
+        def __init__(self, text): self.text = text
+        def filter(self, x): return not (self.text in x.getMessage())
+    pass
+    logger.addFilter(HideLoggingMessage("`use_cache=True`"))
+

unsloth_compiled_cache/UnslothCPOTrainer.py

@@ -0,0 +1,1618 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.cpo_trainer import (Any, AutoModelForCausalLM, BaseImageProcessor, CPOConfig, CPOTrainer, Callable, DPODataCollatorWithPadding, DataCollator, DataLoader, Dataset, EvalLoopOutput, F, FeatureExtractionMixin, Literal, Optional, PartialState, Path, PeftModel, PreTrainedModel, PreTrainedTokenizerBase, ProcessorMixin, Trainer, TrainerCallback, Union, add_bos_token_if_needed, add_eos_token_if_needed, autocast, defaultdict, disable_dropout_in_model, generate_model_card, get_comet_experiment_url, inspect, is_comet_available, is_peft_available, is_torch_fx_proxy, is_wandb_available, log_table_to_comet_experiment, maybe_apply_chat_template, maybe_extract_prompt, nn, np, nullcontext, os, pad_to_length, pd, peft_module_casting_to_bf16, prepare_model_for_kbit_training, random, selective_log_softmax, textwrap, torch, wandb, warnings, F, Optional, PeftModel, PreTrainedModel, Trainer, is_peft_available, os, torch)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothCPOConfig(CPOConfig):
+    """
+    
+    Configuration class for the [`CPOTrainer`].
+
+    This class includes only the parameters that are specific to CPO training. For a full list of training arguments,
+    please refer to the [`~transformers.TrainingArguments`] documentation. Note that default values in this class may
+    differ from those in [`~transformers.TrainingArguments`].
+
+    Using [`~transformers.HfArgumentParser`] we can turn this class into
+    [argparse](https://docs.python.org/3/library/argparse#module-argparse) arguments that can be specified on the
+    command line.
+
+    Parameters:
+        max_length (`int` or `None`, *optional*, defaults to `1024`):
+            Maximum length of the sequences (prompt + completion) in the batch. This argument is required if you want
+            to use the default data collator.
+        max_prompt_length (`int` or `None`, *optional*, defaults to `512`):
+            Maximum length of the prompt. This argument is required if you want to use the default data collator.
+        max_completion_length (`int` or `None`, *optional*, defaults to `None`):
+            Maximum length of the completion. This argument is required if you want to use the default data collator
+            and your model is an encoder-decoder.
+        beta (`float`, *optional*, defaults to `0.1`):
+            Parameter controlling the deviation from the reference model. Higher β means less deviation from the
+            reference model. For the IPO loss (`loss_type="ipo"`), β is the regularization parameter denoted by τ in
+            the [paper](https://huggingface.co/papers/2310.12036).
+        label_smoothing (`float`, *optional*, defaults to `0.0`):
+            Label smoothing factor. This argument is required if you want to use the default data collator.
+        loss_type (`str`, *optional*, defaults to `"sigmoid"`):
+            Type of loss to use. Possible values are:
+
+                - `"sigmoid"`: sigmoid loss from the original [DPO](https://huggingface.co/papers/2305.18290) paper.
+                - `"hinge"`: hinge loss on the normalized likelihood from the
+                  [SLiC](https://huggingface.co/papers/2305.10425) paper.
+                - `"ipo"`: IPO loss from the [IPO](https://huggingface.co/papers/2310.12036) paper.
+                - `"simpo"`: SimPO loss from the [SimPO](https://huggingface.co/papers/2405.14734) paper.
+
+        disable_dropout (`bool`, *optional*, defaults to `True`):
+            Whether to disable dropout in the model.
+        cpo_alpha (`float`, *optional*, defaults to `1.0`):
+            Weight of the BC regularizer in CPO training.
+        simpo_gamma (`float`, *optional*, defaults to `0.5`):
+            Target reward margin for the SimPO loss, used only when the `loss_type="simpo"`.
+        label_pad_token_id (`int`, *optional*, defaults to `-100`):
+            Label pad token id. This argument is required if you want to use the default data collator.
+        padding_value (`int` or `None`, *optional*, defaults to `None`):
+            Padding value to use. If `None`, the padding value of the tokenizer is used.
+        truncation_mode (`str`,*optional*,  defaults to `"keep_end"`):
+            Truncation mode to use when the prompt is too long. Possible values are `"keep_end"` or `"keep_start"`.
+            This argument is required if you want to use the default data collator.
+        generate_during_eval (`bool`, *optional*, defaults to `False`):
+            If `True`, generates and logs completions from the model to W&B or Comet during evaluation.
+        is_encoder_decoder (`bool` or `None`, *optional*, defaults to `None`):
+            When using the `model_init` argument (callable) to instantiate the model instead of the `model` argument,
+            you need to specify if the model returned by the callable is an encoder-decoder model.
+        model_init_kwargs (`dict[str, Any]` or `None`, *optional*, defaults to `None`):
+            Keyword arguments to pass to `AutoModelForCausalLM.from_pretrained` when instantiating the model from a
+            string.
+        dataset_num_proc (`int` or `None`, *optional*, defaults to `None`):
+            Number of processes to use for processing the dataset.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    max_seq_length : Optional[int] = field(
+        default = None,
+        metadata = {'help': 'Maximum sequence length to truncate to.'},
+    )
+    def __init__(
+        self,
+        output_dir = None,
+        overwrite_output_dir = None,
+        do_train = False,
+        do_eval = False,
+        do_predict = False,
+        eval_strategy = 'no',
+        prediction_loss_only = False,
+        per_device_train_batch_size = 4,
+        per_device_eval_batch_size = 4,
+        per_gpu_train_batch_size = None,
+        per_gpu_eval_batch_size = None,
+        gradient_accumulation_steps = 2,
+        eval_accumulation_steps = 2,
+        eval_delay = 0,
+        torch_empty_cache_steps = 250,
+        learning_rate = 5e-05,
+        weight_decay = 0.01,
+        adam_beta1 = 0.9,
+        adam_beta2 = 0.999,
+        adam_epsilon = 1e-08,
+        max_grad_norm = 1.0,
+        num_train_epochs = 3.0,
+        max_steps = -1,
+        lr_scheduler_type = 'linear',
+        warmup_ratio = 0.1,
+        warmup_steps = 0,
+        log_level = 'passive',
+        log_level_replica = 'warning',
+        log_on_each_node = True,
+        logging_dir = None,
+        logging_strategy = 'steps',
+        logging_first_step = False,
+        logging_steps = 1,
+        logging_nan_inf_filter = False,
+        save_strategy = 'steps',
+        save_steps = 500,
+        save_total_limit = None,
+        save_safetensors = True,
+        save_on_each_node = False,
+        save_only_model = False,
+        restore_callback_states_from_checkpoint = False,
+        no_cuda = False,
+        use_cpu = False,
+        use_mps_device = False,
+        seed = 3407,
+        data_seed = 3407,
+        jit_mode_eval = False,
+        use_ipex = False,
+        bf16 = False,
+        fp16 = False,
+        fp16_opt_level = 'O1',
+        half_precision_backend = 'auto',
+        bf16_full_eval = False,
+        fp16_full_eval = False,
+        tf32 = None,
+        local_rank = -1,
+        ddp_backend = None,
+        tpu_num_cores = None,
+        tpu_metrics_debug = False,
+        debug = '',
+        dataloader_drop_last = False,
+        eval_steps = None,
+        dataloader_num_workers = 0,
+        dataloader_prefetch_factor = None,
+        past_index = -1,
+        run_name = None,
+        disable_tqdm = None,
+        remove_unused_columns = True,
+        label_names = None,
+        load_best_model_at_end = False,
+        metric_for_best_model = None,
+        greater_is_better = None,
+        ignore_data_skip = False,
+        fsdp = '',
+        fsdp_min_num_params = 0,
+        fsdp_config = None,
+        fsdp_transformer_layer_cls_to_wrap = None,
+        accelerator_config = None,
+        deepspeed = None,
+        label_smoothing_factor = 0.0,
+        optim = 'adamw_8bit',
+        optim_args = None,
+        adafactor = False,
+        group_by_length = False,
+        length_column_name = 'length',
+        report_to = None,
+        ddp_find_unused_parameters = None,
+        ddp_bucket_cap_mb = None,
+        ddp_broadcast_buffers = None,
+        dataloader_pin_memory = True,
+        dataloader_persistent_workers = False,
+        skip_memory_metrics = True,
+        use_legacy_prediction_loop = False,
+        push_to_hub = False,
+        resume_from_checkpoint = None,
+        hub_model_id = None,
+        hub_strategy = 'every_save',
+        hub_token = None,
+        hub_private_repo = None,
+        hub_always_push = False,
+        hub_revision = None,
+        gradient_checkpointing = False,
+        gradient_checkpointing_kwargs = None,
+        include_inputs_for_metrics = False,
+        eval_do_concat_batches = True,
+        fp16_backend = 'auto',
+        push_to_hub_model_id = None,
+        push_to_hub_organization = None,
+        push_to_hub_token = None,
+        mp_parameters = '',
+        auto_find_batch_size = True,
+        full_determinism = False,
+        torchdynamo = None,
+        ray_scope = 'last',
+        ddp_timeout = 1800,
+        torch_compile = False,
+        torch_compile_backend = None,
+        torch_compile_mode = None,
+        include_tokens_per_second = False,
+        include_num_input_tokens_seen = False,
+        neftune_noise_alpha = None,
+        optim_target_modules = None,
+        batch_eval_metrics = False,
+        eval_on_start = False,
+        use_liger_kernel = False,
+        liger_kernel_config = None,
+        eval_use_gather_object = False,
+        average_tokens_across_devices = True,
+        max_length = 1024,
+        max_prompt_length = 512,
+        max_completion_length = None,
+        beta = 0.1,
+        label_smoothing = 0.0,
+        loss_type = 'sigmoid',
+        disable_dropout = True,
+        cpo_alpha = 1.0,
+        simpo_gamma = 0.5,
+        label_pad_token_id = -100,
+        padding_value = None,
+        truncation_mode = 'keep_end',
+        generate_during_eval = False,
+        is_encoder_decoder = None,
+        model_init_kwargs = None,
+        dataset_num_proc = None,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        max_seq_length = None,
+        **kwargs,
+    ):
+        if learning_rate < 1e-7: raise FloatingPointError(f'Unsloth: Your learning rate of `{learning_rate}` is too small and less than 1e-7! Consider increasing it, otherwise gradient updates will be close to 0!')
+        if learning_rate > 1: raise OverflowError(f'Unsloth: Your learning rate of `{learning_rate}` is way too larger > 1! Consider decreasing it to 1e-1, otherwise gradient updates will explode!')
+        if output_dir is None and save_strategy == 'steps' and save_steps == 500:
+            output_dir = 'unsloth_training_checkpoints'
+            save_strategy = 'no'
+        if dataset_num_proc is None:
+            from multiprocessing import cpu_count
+            dataset_num_proc = min(cpu_count()*2, 2)
+        
+        super().__init__(
+            output_dir = output_dir,
+            overwrite_output_dir = overwrite_output_dir,
+            do_train = do_train,
+            do_eval = do_eval,
+            do_predict = do_predict,
+            eval_strategy = eval_strategy,
+            prediction_loss_only = prediction_loss_only,
+            per_device_train_batch_size = per_device_train_batch_size,
+            per_device_eval_batch_size = per_device_eval_batch_size,
+            per_gpu_train_batch_size = per_gpu_train_batch_size,
+            per_gpu_eval_batch_size = per_gpu_eval_batch_size,
+            gradient_accumulation_steps = gradient_accumulation_steps,
+            eval_accumulation_steps = eval_accumulation_steps,
+            eval_delay = eval_delay,
+            torch_empty_cache_steps = torch_empty_cache_steps,
+            learning_rate = learning_rate,
+            weight_decay = weight_decay,
+            adam_beta1 = adam_beta1,
+            adam_beta2 = adam_beta2,
+            adam_epsilon = adam_epsilon,
+            max_grad_norm = max_grad_norm,
+            num_train_epochs = num_train_epochs,
+            max_steps = max_steps,
+            lr_scheduler_type = lr_scheduler_type,
+            warmup_ratio = warmup_ratio,
+            warmup_steps = warmup_steps,
+            log_level = log_level,
+            log_level_replica = log_level_replica,
+            log_on_each_node = log_on_each_node,
+            logging_dir = logging_dir,
+            logging_strategy = logging_strategy,
+            logging_first_step = logging_first_step,
+            logging_steps = logging_steps,
+            logging_nan_inf_filter = logging_nan_inf_filter,
+            save_strategy = save_strategy,
+            save_steps = save_steps,
+            save_total_limit = save_total_limit,
+            save_safetensors = save_safetensors,
+            save_on_each_node = save_on_each_node,
+            save_only_model = save_only_model,
+            restore_callback_states_from_checkpoint = restore_callback_states_from_checkpoint,
+            no_cuda = no_cuda,
+            use_cpu = use_cpu,
+            use_mps_device = use_mps_device,
+            seed = seed,
+            data_seed = data_seed,
+            jit_mode_eval = jit_mode_eval,
+            use_ipex = use_ipex,
+            bf16 = bf16,
+            fp16 = fp16,
+            fp16_opt_level = fp16_opt_level,
+            half_precision_backend = half_precision_backend,
+            bf16_full_eval = bf16_full_eval,
+            fp16_full_eval = fp16_full_eval,
+            tf32 = tf32,
+            local_rank = local_rank,
+            ddp_backend = ddp_backend,
+            tpu_num_cores = tpu_num_cores,
+            tpu_metrics_debug = tpu_metrics_debug,
+            debug = debug,
+            dataloader_drop_last = dataloader_drop_last,
+            eval_steps = eval_steps,
+            dataloader_num_workers = dataloader_num_workers,
+            dataloader_prefetch_factor = dataloader_prefetch_factor,
+            past_index = past_index,
+            run_name = run_name,
+            disable_tqdm = disable_tqdm,
+            remove_unused_columns = remove_unused_columns,
+            label_names = label_names,
+            load_best_model_at_end = load_best_model_at_end,
+            metric_for_best_model = metric_for_best_model,
+            greater_is_better = greater_is_better,
+            ignore_data_skip = ignore_data_skip,
+            fsdp = fsdp,
+            fsdp_min_num_params = fsdp_min_num_params,
+            fsdp_config = fsdp_config,
+            fsdp_transformer_layer_cls_to_wrap = fsdp_transformer_layer_cls_to_wrap,
+            accelerator_config = accelerator_config,
+            deepspeed = deepspeed,
+            label_smoothing_factor = label_smoothing_factor,
+            optim = optim,
+            optim_args = optim_args,
+            adafactor = adafactor,
+            group_by_length = group_by_length,
+            length_column_name = length_column_name,
+            report_to = report_to,
+            ddp_find_unused_parameters = ddp_find_unused_parameters,
+            ddp_bucket_cap_mb = ddp_bucket_cap_mb,
+            ddp_broadcast_buffers = ddp_broadcast_buffers,
+            dataloader_pin_memory = dataloader_pin_memory,
+            dataloader_persistent_workers = dataloader_persistent_workers,
+            skip_memory_metrics = skip_memory_metrics,
+            use_legacy_prediction_loop = use_legacy_prediction_loop,
+            push_to_hub = push_to_hub,
+            resume_from_checkpoint = resume_from_checkpoint,
+            hub_model_id = hub_model_id,
+            hub_strategy = hub_strategy,
+            hub_token = hub_token,
+            hub_private_repo = hub_private_repo,
+            hub_always_push = hub_always_push,
+            hub_revision = hub_revision,
+            gradient_checkpointing = gradient_checkpointing,
+            gradient_checkpointing_kwargs = gradient_checkpointing_kwargs,
+            include_inputs_for_metrics = include_inputs_for_metrics,
+            eval_do_concat_batches = eval_do_concat_batches,
+            fp16_backend = fp16_backend,
+            push_to_hub_model_id = push_to_hub_model_id,
+            push_to_hub_organization = push_to_hub_organization,
+            push_to_hub_token = push_to_hub_token,
+            mp_parameters = mp_parameters,
+            auto_find_batch_size = auto_find_batch_size,
+            full_determinism = full_determinism,
+            torchdynamo = torchdynamo,
+            ray_scope = ray_scope,
+            ddp_timeout = ddp_timeout,
+            torch_compile = torch_compile,
+            torch_compile_backend = torch_compile_backend,
+            torch_compile_mode = torch_compile_mode,
+            include_tokens_per_second = include_tokens_per_second,
+            include_num_input_tokens_seen = include_num_input_tokens_seen,
+            neftune_noise_alpha = neftune_noise_alpha,
+            optim_target_modules = optim_target_modules,
+            batch_eval_metrics = batch_eval_metrics,
+            eval_on_start = eval_on_start,
+            use_liger_kernel = use_liger_kernel,
+            liger_kernel_config = liger_kernel_config,
+            eval_use_gather_object = eval_use_gather_object,
+            average_tokens_across_devices = average_tokens_across_devices,
+            max_length = max_length,
+            max_prompt_length = max_prompt_length,
+            max_completion_length = max_completion_length,
+            beta = beta,
+            label_smoothing = label_smoothing,
+            loss_type = loss_type,
+            disable_dropout = disable_dropout,
+            cpo_alpha = cpo_alpha,
+            simpo_gamma = simpo_gamma,
+            label_pad_token_id = label_pad_token_id,
+            padding_value = padding_value,
+            truncation_mode = truncation_mode,
+            generate_during_eval = generate_during_eval,
+            is_encoder_decoder = is_encoder_decoder,
+            model_init_kwargs = model_init_kwargs,
+            dataset_num_proc = dataset_num_proc,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        self.max_seq_length = max_seq_length
+pass
+
+class _UnslothCPOTrainer(Trainer):
+    r""""""
+
+    _tag_names = ["trl", "cpo"]
+
+    def __init__(
+        self,
+        model: Optional[Union[PreTrainedModel, nn.Module, str]] = None,
+        args: Optional[CPOConfig] = None,
+        data_collator: Optional[DataCollator] = None,
+        train_dataset: Optional[Dataset] = None,
+        eval_dataset: Optional[Union[Dataset, dict[str, Dataset]]] = None,
+        processing_class: Optional[
+            Union[PreTrainedTokenizerBase, BaseImageProcessor, FeatureExtractionMixin, ProcessorMixin]
+        ] = None,
+        model_init: Optional[Callable[[], PreTrainedModel]] = None,
+        callbacks: Optional[list[TrainerCallback]] = None,
+        optimizers: tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR] = (None, None),
+        preprocess_logits_for_metrics: Optional[Callable[[torch.Tensor, torch.Tensor], torch.Tensor]] = None,
+        peft_config: Optional[dict] = None,
+        compute_metrics: Optional[Callable[[EvalLoopOutput], dict]] = None,
+    ):
+        if args.model_init_kwargs is None:
+            model_init_kwargs = {}
+        elif not isinstance(model, str):
+            raise ValueError("You passed model_kwargs to the CPOTrainer. But your model is already instantiated.")
+        else:
+            model_init_kwargs = args.model_init_kwargs
+            torch_dtype = model_init_kwargs.get("torch_dtype")
+            if torch_dtype is not None:
+                # Convert to `torch.dtype` if an str is passed
+                if isinstance(torch_dtype, str) and torch_dtype != "auto":
+                    torch_dtype = getattr(torch, torch_dtype)
+                if torch_dtype != "auto" and not isinstance(torch_dtype, torch.dtype):
+                    raise ValueError(
+                        f"Invalid `torch_dtype` passed to the CPOConfig. Expected a string with either `torch.dtype` or 'auto', but got {torch_dtype}."
+                    )
+                model_init_kwargs["torch_dtype"] = torch_dtype
+
+        if isinstance(model, str):
+            model = AutoModelForCausalLM.from_pretrained(model, **model_init_kwargs)
+
+        # Initialize this variable to False. This helps tracking the case when `peft_module_casting_to_bf16`
+        # has been called in order to properly call autocast if needed.
+        self._peft_has_been_casted_to_bf16 = False
+
+        if not is_peft_available() and peft_config is not None:
+            raise ValueError(
+                "PEFT is not installed and you passed a `peft_config` in the trainer's kwargs, please install it to use the PEFT models"
+            )
+        elif is_peft_available() and peft_config is not None:
+            # if model is a peft model and we have a peft_config, we merge and unload it first
+            if isinstance(model, PeftModel):
+                model = model.merge_and_unload()
+
+            if getattr(model, "is_loaded_in_8bit", False) or getattr(model, "is_loaded_in_4bit", False):
+                _support_gc_kwargs = hasattr(
+                    args, "gradient_checkpointing_kwargs"
+                ) and "gradient_checkpointing_kwargs" in list(
+                    inspect.signature(prepare_model_for_kbit_training).parameters
+                )
+
+                prepare_model_kwargs = {"use_gradient_checkpointing": args.gradient_checkpointing}
+
+                if _support_gc_kwargs:
+                    prepare_model_kwargs["gradient_checkpointing_kwargs"] = args.gradient_checkpointing_kwargs
+
+                model = prepare_model_for_kbit_training(model, **prepare_model_kwargs)
+            elif args.gradient_checkpointing:
+                # For backward compatibility with older versions of transformers
+                if hasattr(model, "enable_input_require_grads"):
+                    model.enable_input_require_grads()
+                else:
+
+                    def make_inputs_require_grad(module, input, output):
+                        output.requires_grad_(True)
+
+                    model.get_input_embeddings().register_forward_hook(make_inputs_require_grad)
+
+            # get peft model with the given config
+            model = model
+            if args.bf16 and getattr(model, "is_loaded_in_4bit", False):
+                peft_module_casting_to_bf16(model)
+                # If args.bf16 we need to explicitly call `generate` with torch amp autocast context manager
+                self._peft_has_been_casted_to_bf16 = True
+
+        # For models that use gradient_checkpointing, we need to attach a hook that enables input
+        # to explicitly have `requires_grad=True`, otherwise training will either silently
+        # fail or completely fail.
+        elif args.gradient_checkpointing:
+            # For backward compatibility with older versions of transformers
+            if hasattr(model, "enable_input_require_grads"):
+                model.enable_input_require_grads()
+            else:
+
+                def make_inputs_require_grad(module, input, output):
+                    output.requires_grad_(True)
+
+                model.get_input_embeddings().register_forward_hook(make_inputs_require_grad)
+
+        if args.generate_during_eval and not (is_wandb_available() or is_comet_available()):
+            raise ValueError(
+                "`generate_during_eval=True` requires Weights and Biases or Comet to be installed."
+                " Please install `wandb` or `comet-ml` to resolve."
+            )
+
+        if model is not None:
+            self.is_encoder_decoder = model.config.is_encoder_decoder
+        elif args.is_encoder_decoder is None:
+            raise ValueError("When no model is provided, you need to pass the parameter is_encoder_decoder.")
+        else:
+            self.is_encoder_decoder = args.is_encoder_decoder
+
+        if self.is_encoder_decoder:
+            self.decoder_start_token_id = model.config.decoder_start_token_id
+            self.pad_token_id = model.config.pad_token_id
+
+        if processing_class is None:
+            raise ValueError("processing_class must be specified to tokenize a CPO dataset.")
+        if args.max_length is None:
+            warnings.warn(
+                "`max_length` is not set in the CPOConfig's init"
+                " it will default to `512` by default, but you should do it yourself in the future.",
+                UserWarning,
+            )
+            max_length = 512
+        else:
+            max_length = args.max_length
+        if args.max_prompt_length is None:
+            warnings.warn(
+                "`max_prompt_length` is not set in the CPOConfig's init"
+                " it will default to `128` by default, but you should do it yourself in the future.",
+                UserWarning,
+            )
+            max_prompt_length = 128
+        else:
+            max_prompt_length = args.max_prompt_length
+
+        if not max_prompt_length < max_length:
+            raise ValueError(
+                f"max_prompt_length ({max_prompt_length}) should be strictly less than max_length ({max_length})."
+            )
+
+        if args.max_completion_length is None and self.is_encoder_decoder:
+            warnings.warn(
+                "When using an encoder decoder architecture, you should set `max_completion_length` in the CPOConfig's init"
+                " it will default to `128` by default, but you should do it yourself in the future.",
+                UserWarning,
+            )
+            max_completion_length = 128
+        else:
+            max_completion_length = args.max_completion_length
+
+        if data_collator is None:
+            data_collator = DPODataCollatorWithPadding(
+                pad_token_id=processing_class.pad_token_id,
+                label_pad_token_id=args.label_pad_token_id,
+                is_encoder_decoder=self.is_encoder_decoder,
+            )
+
+            if args.remove_unused_columns:
+                args.remove_unused_columns = False
+                # warn users
+                warnings.warn(
+                    "When using DPODataCollatorWithPadding, you should set `remove_unused_columns=False` in your TrainingArguments"
+                    " we have set it for you, but you should do it yourself in the future.",
+                    UserWarning,
+                )
+
+            self.use_dpo_data_collator = True
+        else:
+            self.use_dpo_data_collator = False
+
+        # Disable dropout in the model
+        if args.disable_dropout:
+            disable_dropout_in_model(model)
+
+        self.max_length = max_length
+        self.generate_during_eval = args.generate_during_eval
+        self.label_pad_token_id = args.label_pad_token_id
+        self.padding_value = args.padding_value if args.padding_value is not None else processing_class.pad_token_id
+        self.max_prompt_length = max_prompt_length
+        self.truncation_mode = args.truncation_mode
+        self.max_completion_length = max_completion_length
+        self.processing_class = processing_class
+
+        if args.loss_type in ["hinge", "ipo"] and args.label_smoothing > 0:
+            warnings.warn(
+                f"You are using the {args.loss_type} loss type that does not support label smoothing. The "
+                "`label_smoothing` parameter will be ignored. Set `label_smoothing` to `0.0` to remove this warning.",
+                UserWarning,
+            )
+        if args.loss_type == "kto_pair":
+            raise ValueError("Support for kto_pair has been removed in CPOTrainer. Please use KTOTrainer.")
+
+        self.beta = args.beta
+        self.label_smoothing = args.label_smoothing
+        self.loss_type = args.loss_type
+        self.cpo_alpha = args.cpo_alpha
+        self.aux_loss_enabled = getattr(model.config, "output_router_logits", False)
+        self.aux_loss_coef = getattr(model.config, "router_aux_loss_coef", 0.0)
+        if self.aux_loss_enabled and self.aux_loss_coef == 0.0:
+            warnings.warn(
+                "You set `output_router_logits` to `True` in the model config, but `router_aux_loss_coef` is set to "
+                "`0.0`, meaning the auxiliary loss will not be used. Either set `router_aux_loss_coef` to a value "
+                "greater than `0.0`, or set `output_router_logits` to `False` if you don't want to use the auxiliary "
+                "loss.",
+                UserWarning,
+            )
+
+        if args.loss_type == "simpo":
+            self.simpo_gamma = args.simpo_gamma
+
+        self._stored_metrics = defaultdict(lambda: defaultdict(list))
+
+        # The trainer estimates the number of FLOPs [floating-point operations] using the number of elements in the
+        # input tensor associated with the key "input_ids". However, in CPO, the sampled data does not include the
+        # "input_ids" key. Instead, the available keys are "prompt_input_ids", "chosen_input_ids", and
+        # "rejected_input_ids". As a result, the trainer issues the warning: "Could not estimate the number of tokens
+        # of the input, floating-point operations will not be computed." To suppress this warning, we set the
+        # "estimate_tokens" key in the model's "warnings_issued" dictionary to True. This acts as a flag to indicate
+        # that the warning has already been issued.
+        model.warnings_issued["estimate_tokens"] = True
+
+        # Compute that only on the main process for faster data processing.
+        # see: https://github.com/huggingface/trl/pull/1255
+        with PartialState().main_process_first():
+            # Extract the prompt if needed, and apply the chat template if needed
+            train_dataset = train_dataset.map(maybe_extract_prompt, num_proc=args.dataset_num_proc)
+            train_dataset = train_dataset.map(
+                maybe_apply_chat_template, fn_kwargs={"tokenizer": processing_class}, num_proc=args.dataset_num_proc
+            )
+            if eval_dataset is not None:
+                eval_dataset = eval_dataset.map(maybe_extract_prompt, num_proc=args.dataset_num_proc)
+                eval_dataset = eval_dataset.map(
+                    maybe_apply_chat_template,
+                    fn_kwargs={"tokenizer": processing_class},
+                    num_proc=args.dataset_num_proc,
+                )
+
+            # tokenize the dataset
+            train_dataset = train_dataset.map(self.tokenize_row, num_proc=args.dataset_num_proc)
+            if eval_dataset is not None:
+                eval_dataset = eval_dataset.map(self.tokenize_row, num_proc=args.dataset_num_proc)
+
+        super().__init__(
+            model=model,
+            args=args,
+            data_collator=data_collator,
+            train_dataset=train_dataset,
+            eval_dataset=eval_dataset,
+            processing_class=processing_class,
+            model_init=model_init,
+            compute_metrics=compute_metrics,
+            callbacks=callbacks,
+            optimizers=optimizers,
+            preprocess_logits_for_metrics=preprocess_logits_for_metrics,
+        )
+
+        # Gradient accumulation requires scaled loss. Normally, loss scaling in the parent class depends on whether the
+        # model accepts loss-related kwargs. Since we compute our own loss, this check is irrelevant. We set
+        # self.model_accepts_loss_kwargs to False to enable scaling.
+        self.model_accepts_loss_kwargs = False
+
+        # Add tags for models that have been loaded with the correct transformers version
+        if hasattr(self.model, "add_model_tags"):
+            self.model.add_model_tags(self._tag_names)
+
+        if not hasattr(self, "accelerator"):
+            raise AttributeError(
+                "Your `Trainer` does not have an `accelerator` object. Consider upgrading `transformers`."
+            )
+
+    def build_tokenized_answer(self, prompt, answer):
+        """
+        Llama tokenizer does satisfy `enc(a + b) = enc(a) + enc(b)`. It does ensure `enc(a + b) = enc(a) + enc(a +
+        b)[len(enc(a)):]`. Reference:
+            https://github.com/EleutherAI/lm-evaluation-harness/pull/531#issuecomment-1595586257
+        """
+
+        full_tokenized = self.processing_class(prompt + answer, add_special_tokens=False)
+        prompt_input_ids = self.processing_class(prompt, add_special_tokens=False)["input_ids"]
+
+        answer_input_ids = full_tokenized["input_ids"][len(prompt_input_ids) :]
+        answer_attention_mask = full_tokenized["attention_mask"][len(prompt_input_ids) :]
+
+        # Concat tokens to form `enc(a) + enc(a + b)[len(enc(a)):]`
+        full_concat_input_ids = np.concatenate([prompt_input_ids, answer_input_ids])
+
+        # Prepare input tokens for token by token comparison
+        full_input_ids = np.array(full_tokenized["input_ids"])
+
+        if len(full_input_ids) != len(full_concat_input_ids):
+            raise ValueError("Prompt input ids and answer input ids should have the same length.")
+
+        # On some tokenizers, like Llama-2 tokenizer, there are occasions where tokens
+        # can be merged together when tokenizing prompt+answer. This could result
+        # on the last token from the prompt being different when tokenized on its own
+        # vs when done as prompt+answer.
+        response_token_ids_start_idx = len(prompt_input_ids)
+
+        # If tokenized prompt is different than both prompt+answer, then it means the
+        # last token has changed due to merging.
+        if prompt_input_ids != full_tokenized["input_ids"][:response_token_ids_start_idx]:
+            response_token_ids_start_idx -= 1
+
+        prompt_input_ids = full_tokenized["input_ids"][:response_token_ids_start_idx]
+        prompt_attention_mask = full_tokenized["attention_mask"][:response_token_ids_start_idx]
+
+        if len(prompt_input_ids) != len(prompt_attention_mask):
+            raise ValueError("Prompt input ids and attention mask should have the same length.")
+
+        answer_input_ids = full_tokenized["input_ids"][response_token_ids_start_idx:]
+        answer_attention_mask = full_tokenized["attention_mask"][response_token_ids_start_idx:]
+
+        return dict(
+            prompt_input_ids=prompt_input_ids,
+            prompt_attention_mask=prompt_attention_mask,
+            input_ids=answer_input_ids,
+            attention_mask=answer_attention_mask,
+        )
+
+    def tokenize_row(self, feature, model: Optional[Union[PreTrainedModel, nn.Module]] = None) -> dict:
+        """Tokenize a single row from a CPO specific dataset.
+
+        At this stage, we don't convert to PyTorch tensors yet; we just handle the truncation in case the prompt +
+        chosen or prompt + rejected responses is/are too long. First we truncate the prompt; if we're still too long,
+        we truncate the chosen/rejected.
+
+        We also create the labels for the chosen/rejected responses, which are of length equal to the sum of the length
+        of the prompt and the chosen/rejected response, with label_pad_token_id for the prompt tokens.
+        """
+        batch = {}
+        prompt = feature["prompt"]
+        chosen = feature["chosen"]
+        rejected = feature["rejected"]
+
+        if not self.is_encoder_decoder:
+            # Check issues below for more details
+            #  1. https://github.com/huggingface/trl/issues/907
+            #  2. https://github.com/EleutherAI/lm-evaluation-harness/pull/531#issuecomment-1595586257
+            #  3. https://github.com/LianjiaTech/BELLE/issues/337
+
+            if not isinstance(prompt, str):
+                raise ValueError(f"prompt should be an str but got {type(prompt)}")
+            prompt_tokens = self.processing_class(prompt, add_special_tokens=False)
+            prompt_tokens = {f"prompt_{k}": v for k, v in prompt_tokens.items()}
+
+            if not isinstance(chosen, str):
+                raise ValueError(f"chosen should be an str but got {type(chosen)}")
+            chosen_tokens = self.build_tokenized_answer(prompt, chosen)
+
+            if not isinstance(rejected, str):
+                raise ValueError(f"rejected should be an str but got {type(rejected)}")
+            rejected_tokens = self.build_tokenized_answer(prompt, rejected)
+
+            # Last prompt token might get merged by tokenizer and
+            # it should not be included for generation if that happens
+            prompt_len_input_ids = len(prompt_tokens["prompt_input_ids"])
+
+            chosen_prompt_len_input_ids = len(chosen_tokens["prompt_input_ids"])
+            rejected_prompt_len_input_ids = len(rejected_tokens["prompt_input_ids"])
+            prompt_len_input_ids = min(chosen_prompt_len_input_ids, rejected_prompt_len_input_ids)
+
+            for k, v in prompt_tokens.items():
+                prompt_tokens[k] = v[:prompt_len_input_ids]
+
+            # Make sure prompts only have one different token at most an
+            # and length only differs by 1 at most
+            num_diff_tokens = sum(
+                [a != b for a, b in zip(chosen_tokens["prompt_input_ids"], rejected_tokens["prompt_input_ids"])]
+            )
+            num_diff_len = abs(chosen_prompt_len_input_ids - rejected_prompt_len_input_ids)
+            if num_diff_tokens > 1 or num_diff_len > 1:
+                raise ValueError(
+                    "Chosen and rejected prompt_input_ids might only differ on the "
+                    "last token due to tokenizer merge ops."
+                )
+
+            # add BOS token to head of prompt. Avoid adding if it's already there
+            prompt_tokens, chosen_tokens, rejected_tokens = add_bos_token_if_needed(
+                self.processing_class.bos_token_id,
+                prompt_len_input_ids,
+                prompt_tokens,
+                chosen_prompt_len_input_ids,
+                chosen_tokens,
+                rejected_prompt_len_input_ids,
+                rejected_tokens,
+            )
+
+            # add EOS token to end of answer. Avoid adding if it's already there
+            chosen_tokens, rejected_tokens = add_eos_token_if_needed(
+                self.processing_class.eos_token_id, chosen_tokens, rejected_tokens
+            )
+
+            longer_response_length = max(len(chosen_tokens["input_ids"]), len(rejected_tokens["input_ids"]))
+
+            # if combined sequence is too long, truncate the prompt
+            for answer_tokens in [chosen_tokens, rejected_tokens, prompt_tokens]:
+                if len(answer_tokens["prompt_input_ids"]) + longer_response_length > self.max_length:
+                    if self.truncation_mode == "keep_start":
+                        for k in ["prompt_input_ids", "prompt_attention_mask"]:
+                            answer_tokens[k] = answer_tokens[k][: self.max_prompt_length]
+                    elif self.truncation_mode == "keep_end":
+                        for k in ["prompt_input_ids", "prompt_attention_mask"]:
+                            answer_tokens[k] = answer_tokens[k][-self.max_prompt_length :]
+                    else:
+                        raise ValueError(f"Unknown truncation mode: {self.truncation_mode}")
+
+            # if that's still too long, truncate the response
+            for answer_tokens in [chosen_tokens, rejected_tokens]:
+                if len(answer_tokens["prompt_input_ids"]) + longer_response_length > self.max_length:
+                    for k in ["input_ids", "attention_mask"]:
+                        answer_tokens[k] = answer_tokens[k][: self.max_length - self.max_prompt_length]
+
+            # Create labels
+            chosen_sequence_tokens = {
+                k: chosen_tokens[f"prompt_{k}"] + chosen_tokens[k] for k in ["input_ids", "attention_mask"]
+            }
+            rejected_sequence_tokens = {
+                k: rejected_tokens[f"prompt_{k}"] + rejected_tokens[k] for k in ["input_ids", "attention_mask"]
+            }
+            chosen_sequence_tokens["labels"] = chosen_sequence_tokens["input_ids"][:]
+            chosen_sequence_tokens["labels"][: len(chosen_tokens["prompt_input_ids"])] = [
+                self.label_pad_token_id
+            ] * len(chosen_tokens["prompt_input_ids"])
+            rejected_sequence_tokens["labels"] = rejected_sequence_tokens["input_ids"][:]
+            rejected_sequence_tokens["labels"][: len(rejected_tokens["prompt_input_ids"])] = [
+                self.label_pad_token_id
+            ] * len(rejected_tokens["prompt_input_ids"])
+
+            for k, toks in {
+                "chosen_": chosen_sequence_tokens,
+                "rejected_": rejected_sequence_tokens,
+                "": prompt_tokens,
+            }.items():
+                for type_key, tokens in toks.items():
+                    if type_key == "token_type_ids":
+                        continue
+                    batch[f"{k}{type_key}"] = tokens
+
+        else:
+            chosen_tokens = self.processing_class(
+                chosen, truncation=True, max_length=self.max_completion_length, add_special_tokens=True
+            )
+            rejected_tokens = self.processing_class(
+                rejected, truncation=True, max_length=self.max_completion_length, add_special_tokens=True
+            )
+            prompt_tokens = self.processing_class(
+                prompt, truncation=True, max_length=self.max_prompt_length, add_special_tokens=True
+            )
+
+            batch["chosen_labels"] = chosen_tokens["input_ids"]
+            batch["rejected_labels"] = rejected_tokens["input_ids"]
+            batch["prompt_input_ids"] = prompt_tokens["input_ids"]
+            batch["prompt_attention_mask"] = prompt_tokens["attention_mask"]
+
+            if model is not None and hasattr(model, "prepare_decoder_input_ids_from_labels"):
+                batch["rejected_decoder_input_ids"] = model.prepare_decoder_input_ids_from_labels(
+                    labels=torch.tensor(batch["rejected_labels"])
+                )
+                batch["chosen_decoder_input_ids"] = model.prepare_decoder_input_ids_from_labels(
+                    labels=torch.tensor(batch["chosen_labels"])
+                )
+
+        return batch
+
+    @staticmethod
+    def concatenated_inputs(
+        batch: dict[str, Union[list, torch.LongTensor]],
+        is_encoder_decoder: bool = False,
+        label_pad_token_id: int = -100,
+        padding_value: int = 0,
+        device: Optional[torch.device] = None,
+    ) -> dict[str, torch.LongTensor]:
+        """Concatenate the chosen and rejected inputs into a single tensor.
+
+        Args:
+            batch:
+                A batch of data. Must contain the keys 'chosen_input_ids' and 'rejected_input_ids', which are tensors
+                of shape (batch_size, sequence_length).
+            is_encoder_decoder:
+                Whether the model is an encoder-decoder model.
+            label_pad_token_id:
+                The label pad token id.
+            padding_value:
+                The padding value to use for the concatenated inputs_ids.
+            device:
+                The device for the concatenated inputs.
+
+        Returns:
+            A dictionary containing the concatenated inputs under the key 'concatenated_input_ids'.
+        """
+        concatenated_batch = {}
+
+        if is_encoder_decoder:
+            max_length = max(batch["chosen_labels"].shape[1], batch["rejected_labels"].shape[1])
+        else:
+            max_length = max(batch["chosen_input_ids"].shape[1], batch["rejected_input_ids"].shape[1])
+
+        for k in batch:
+            if k.startswith("chosen") and isinstance(batch[k], torch.Tensor):
+                if "labels" in k or is_encoder_decoder:
+                    pad_value = label_pad_token_id
+                elif k.endswith("_input_ids"):
+                    pad_value = padding_value
+                elif k.endswith("_attention_mask"):
+                    pad_value = 0
+                concatenated_key = k.replace("chosen", "concatenated")
+                concatenated_batch[concatenated_key] = pad_to_length(batch[k], max_length, pad_value=pad_value)
+        for k in batch:
+            if k.startswith("rejected") and isinstance(batch[k], torch.Tensor):
+                if "labels" in k or is_encoder_decoder:
+                    pad_value = label_pad_token_id
+                elif k.endswith("_input_ids"):
+                    pad_value = padding_value
+                elif k.endswith("_attention_mask"):
+                    pad_value = 0
+                concatenated_key = k.replace("rejected", "concatenated")
+                concatenated_batch[concatenated_key] = torch.cat(
+                    (
+                        concatenated_batch[concatenated_key],
+                        pad_to_length(batch[k], max_length, pad_value=pad_value),
+                    ),
+                    dim=0,
+                ).to(device=device)
+
+        if is_encoder_decoder:
+            concatenated_batch["concatenated_input_ids"] = batch["prompt_input_ids"].repeat(2, 1).to(device=device)
+            concatenated_batch["concatenated_attention_mask"] = (
+                batch["prompt_attention_mask"].repeat(2, 1).to(device=device)
+            )
+
+        return concatenated_batch
+
+    def cpo_loss(
+        self,
+        policy_chosen_logps: torch.FloatTensor,
+        policy_rejected_logps: torch.FloatTensor,
+    ) -> tuple[torch.FloatTensor, torch.FloatTensor, torch.FloatTensor]:
+        """Compute the CPO loss for a batch of policy and reference model log probabilities.
+
+        Args:
+            policy_chosen_logps:
+                Log probabilities of the policy model for the chosen responses. Shape: (batch_size,)
+            policy_rejected_logps:
+                Log probabilities of the policy model for the rejected responses. Shape: (batch_size,)
+
+        Returns:
+            A tuple of three tensors: (losses, chosen_rewards, rejected_rewards). The losses tensor contains the CPO
+            loss for each example in the batch. The chosen_rewards and rejected_rewards tensors contain the rewards for
+            the chosen and rejected responses, respectively.
+        """
+        logits = (policy_chosen_logps - policy_rejected_logps).to(self.accelerator.device)
+
+        # The beta is a temperature parameter for the CPO loss, typically something in the range of 0.1 to 0.5.
+        # We ignore the reference model as beta -> 0. The label_smoothing parameter encodes our uncertainty about the labels and
+        # calculates a conservative CPO loss.
+
+        if self.loss_type == "simpo":
+            gamma_logratios = self.simpo_gamma / self.beta
+            logits = logits - gamma_logratios
+            # This reduces to Equation 3 from the CPO paper when label_smoothing -> 0.
+            losses = (
+                -F.logsigmoid(self.beta * logits) * (1 - self.label_smoothing)
+                - F.logsigmoid(-self.beta * logits) * self.label_smoothing
+            )
+        elif self.loss_type == "sigmoid":
+            # This reduces to Equation 3 from the CPO paper when label_smoothing -> 0.
+            losses = (
+                -F.logsigmoid(self.beta * logits) * (1 - self.label_smoothing)
+                - F.logsigmoid(-self.beta * logits) * self.label_smoothing
+            )
+        elif self.loss_type == "hinge":
+            losses = torch.relu(1 - self.beta * logits)
+        elif self.loss_type == "ipo":
+            # eqn (17) of the paper where beta is the regularization parameter for the IPO loss, denoted by tau in the paper.
+            losses = (logits - 1 / (2 * self.beta)) ** 2
+        else:
+            raise ValueError(
+                f"Unknown loss type: {self.loss_type}. Should be one of ['sigmoid', 'hinge', 'ipo', 'simpo']"
+            )
+
+        chosen_rewards = self.beta * (policy_chosen_logps.to(self.accelerator.device)).detach()
+        rejected_rewards = self.beta * (policy_rejected_logps.to(self.accelerator.device)).detach()
+
+        return losses, chosen_rewards, rejected_rewards
+
+    @staticmethod
+    def get_batch_logps(
+        logits: torch.FloatTensor,
+        labels: torch.LongTensor,
+        average_log_prob: bool = False,
+        label_pad_token_id: int = -100,
+        is_encoder_decoder: bool = False,
+    ) -> torch.FloatTensor:
+        """Compute the log probabilities of the given labels under the given logits.
+
+        Args:
+            logits: Logits of the model (unnormalized). Shape: (batch_size, sequence_length, vocab_size)
+            labels:
+                Labels for which to compute the log probabilities. Label tokens with a value of label_pad_token_id are
+                ignored. Shape: (batch_size, sequence_length)
+            average_log_prob:
+                If True, return the average log probability per (non-masked) token. Otherwise, return the sum of the
+                log probabilities of the (non-masked) tokens.
+            label_pad_token_id: The label pad token id.
+            is_encoder_decoder: Whether the model is an encoder-decoder model.
+
+        Returns:
+            A tensor of shape (batch_size,) containing the average/sum log probabilities of the given labels under the
+            given logits.
+        """
+        if logits.shape[:-1] != labels.shape:
+            raise ValueError("Logits (batch and sequence length dim) and labels must have the same shape.")
+
+        if not is_encoder_decoder:
+            labels = labels[:, 1:].clone()
+            logits = logits[:, :-1, :]
+        loss_mask = labels != label_pad_token_id
+
+        # dummy token; we'll ignore the losses on these tokens later
+        labels[labels == label_pad_token_id] = 0
+
+        per_token_logps = selective_log_softmax(logits, labels)
+
+        if average_log_prob:
+            return (per_token_logps * loss_mask).sum(-1) / loss_mask.sum(-1)
+        else:
+            return (per_token_logps * loss_mask).sum(-1)
+
+    def concatenated_forward(
+        self, model: nn.Module, batch: dict[str, Union[list, torch.LongTensor]]
+    ) -> tuple[torch.FloatTensor, torch.FloatTensor, torch.FloatTensor, torch.FloatTensor]:
+        """Run the given model on the given batch of inputs, concatenating the chosen and rejected inputs together.
+
+        We do this to avoid doing two forward passes, because it's faster for FSDP.
+        """
+        concatenated_batch = self.concatenated_inputs(
+            batch,
+            is_encoder_decoder=self.is_encoder_decoder,
+            label_pad_token_id=self.label_pad_token_id,
+            padding_value=self.padding_value,
+            device=self.accelerator.device,
+        )
+        len_chosen = batch["chosen_labels"].shape[0]
+
+        model_kwargs = (
+            {
+                "decoder_input_ids": self._shift_right(concatenated_batch["concatenated_labels"]),
+            }
+            if self.is_encoder_decoder
+            else {}
+        )
+
+        if self.aux_loss_enabled:
+            model_kwargs["output_router_logits"] = True
+
+        outputs = model(
+            concatenated_batch["concatenated_input_ids"],
+            attention_mask=concatenated_batch["concatenated_attention_mask"],
+            use_cache=False,
+            **model_kwargs,
+        )
+        all_logits = outputs.logits
+
+        def cross_entropy_loss(logits, labels):
+            if not self.is_encoder_decoder:
+                # Shift so that tokens < n predict n
+                logits = logits[..., :-1, :].contiguous()
+                labels = labels[..., 1:].contiguous()
+            # Flatten the tokens
+            loss_fct = nn.CrossEntropyLoss()
+            logits = logits.view(-1, logits.shape[-1])
+            labels = labels.view(-1)
+            # Enable model parallelism
+            labels = labels.to(logits.device)
+            loss = loss_fct(logits, labels)
+            return loss
+
+        labels = concatenated_batch["concatenated_labels"].clone()
+
+        if self.cpo_alpha == 0:
+            nll_loss = torch.tensor(0.0).to(self.accelerator.device)
+        else:
+            nll_loss = cross_entropy_loss(all_logits[:len_chosen], labels[:len_chosen])
+
+        all_logps = self.get_batch_logps(
+            all_logits,
+            concatenated_batch["concatenated_labels"],
+            average_log_prob=self.loss_type in ["ipo", "simpo"],
+            is_encoder_decoder=self.is_encoder_decoder,
+            label_pad_token_id=self.label_pad_token_id,
+        )
+
+        chosen_logps = all_logps[:len_chosen]
+        rejected_logps = all_logps[len_chosen:]
+
+        chosen_logits = all_logits[:len_chosen]
+        rejected_logits = all_logits[len_chosen:]
+
+        if self.aux_loss_enabled:
+            return (chosen_logps, rejected_logps, chosen_logits, rejected_logits, nll_loss, outputs.aux_loss)
+
+        return (chosen_logps, rejected_logps, chosen_logits, rejected_logits, nll_loss)
+
+    def get_batch_loss_metrics(
+        self,
+        model,
+        batch: dict[str, Union[list, torch.LongTensor]],
+        train_eval: Literal["train", "eval"] = "train",
+    ):
+        """Compute the CPO loss and other metrics for the given batch of inputs for train or test."""
+        metrics = {}
+
+        forward_output = self.concatenated_forward(model, batch)
+        (
+            policy_chosen_logps,
+            policy_rejected_logps,
+            policy_chosen_logits,
+            policy_rejected_logits,
+            policy_nll_loss,
+        ) = forward_output[:5]
+        if self.aux_loss_enabled:
+            aux_loss = forward_output[5]
+
+        losses, chosen_rewards, rejected_rewards = self.cpo_loss(
+            policy_chosen_logps,
+            policy_rejected_logps,
+        )
+
+        loss = losses.mean() + self.cpo_alpha * policy_nll_loss
+        reward_accuracies = (chosen_rewards > rejected_rewards).float()
+
+        prefix = "eval_" if train_eval == "eval" else ""
+        metrics[f"{prefix}rewards/chosen"] = self.accelerator.gather_for_metrics(chosen_rewards).mean().item()
+        metrics[f"{prefix}rewards/rejected"] = self.accelerator.gather_for_metrics(rejected_rewards).mean().item()
+        metrics[f"{prefix}rewards/accuracies"] = self.accelerator.gather_for_metrics(reward_accuracies).mean().item()
+        metrics[f"{prefix}rewards/margins"] = (
+            self.accelerator.gather_for_metrics(chosen_rewards - rejected_rewards).mean().item()
+        )
+        metrics[f"{prefix}logps/rejected"] = (
+            self.accelerator.gather_for_metrics(policy_rejected_logps).detach().mean().item()
+        )
+        metrics[f"{prefix}logps/chosen"] = (
+            self.accelerator.gather_for_metrics(policy_chosen_logps).detach().mean().item()
+        )
+        metrics[f"{prefix}logits/rejected"] = (
+            self.accelerator.gather_for_metrics(policy_rejected_logits.detach().mean()).mean().item()
+        )
+        metrics[f"{prefix}logits/chosen"] = (
+            self.accelerator.gather_for_metrics(policy_chosen_logits.detach().mean()).mean().item()
+        )
+        metrics[f"{prefix}nll_loss"] = self.accelerator.gather_for_metrics(policy_nll_loss).detach().mean().item()
+
+        if self.aux_loss_enabled:
+            loss += self.aux_loss_coef * aux_loss
+
+        return loss, metrics
+
+    def compute_loss(
+        self,
+        model: Union[PreTrainedModel, nn.Module],
+        inputs: dict[str, Union[torch.Tensor, Any]],
+        return_outputs=False,
+        num_items_in_batch=None,
+    ) -> Union[torch.Tensor, tuple[torch.Tensor, dict[str, torch.Tensor]]]:
+        compute_loss_context_manager = (
+            autocast(self.accelerator.device.type) if self._peft_has_been_casted_to_bf16 else nullcontext()
+        )
+
+        with compute_loss_context_manager:
+            loss, metrics = self.get_batch_loss_metrics(model, inputs, train_eval="train")
+
+        # force log the metrics
+        self.store_metrics(metrics, train_eval="train")
+
+        if return_outputs:
+            return (loss, metrics)
+        return loss
+
+    def generate_from_model(self, model, batch: dict[str, torch.LongTensor]) -> str:
+        """Generate samples from the model and reference model for the given batch of inputs."""
+
+        # If one uses `generate_during_eval` with peft + bf16, we need to explicitly call generate with
+        # the torch amp context manager as some hidden states are silently casted to full precision.
+        generate_context_manager = (
+            autocast(self.accelerator.device.type) if self._peft_has_been_casted_to_bf16 else nullcontext()
+        )
+
+        with generate_context_manager:
+            policy_output = model.generate(
+                input_ids=batch["prompt_input_ids"],
+                attention_mask=batch["prompt_attention_mask"],
+                max_length=self.max_length,
+                do_sample=True,
+                pad_token_id=self.processing_class.pad_token_id,
+            )
+
+        policy_output = pad_to_length(policy_output, self.max_length, self.processing_class.pad_token_id)
+        policy_output_decoded = self.processing_class.batch_decode(policy_output, skip_special_tokens=True)
+
+        return policy_output_decoded
+
+    def prediction_step(
+        self,
+        model: Union[PreTrainedModel, nn.Module],
+        inputs: dict[str, Union[torch.Tensor, Any]],
+        prediction_loss_only: bool,
+        ignore_keys: Optional[list[str]] = None,
+    ):
+        if ignore_keys is None:
+            if hasattr(model, "config"):
+                ignore_keys = getattr(model.config, "keys_to_ignore_at_inference", [])
+            else:
+                ignore_keys = []
+
+        prediction_context_manager = (
+            autocast(self.accelerator.device.type) if self._peft_has_been_casted_to_bf16 else nullcontext()
+        )
+
+        with torch.no_grad(), prediction_context_manager:
+            loss, metrics = self.get_batch_loss_metrics(model, inputs, train_eval="eval")
+
+        # force log the metrics
+        self.store_metrics(metrics, train_eval="eval")
+
+        if prediction_loss_only:
+            return (loss.detach(), None, None)
+
+        # logits for the chosen and rejected samples from model
+        logits_dict = {
+            "eval_logits/chosen": metrics["eval_logits/chosen"],
+            "eval_logits/rejected": metrics["eval_logits/rejected"],
+        }
+        logits = [v for k, v in logits_dict.items() if k not in ignore_keys]
+        logits = torch.tensor(logits, device=self.accelerator.device)
+        labels = torch.zeros(logits.shape[0], device=self.accelerator.device)
+
+        return (loss.detach(), logits, labels)
+
+    def store_metrics(self, metrics: dict[str, float], train_eval: Literal["train", "eval"] = "train") -> None:
+        for key, value in metrics.items():
+            self._stored_metrics[train_eval][key].append(value)
+
+    def evaluation_loop(
+        self,
+        dataloader: DataLoader,
+        description: str,
+        prediction_loss_only: Optional[bool] = None,
+        ignore_keys: Optional[list[str]] = None,
+        metric_key_prefix: str = "eval",
+    ) -> EvalLoopOutput:
+        """
+        Overriding built-in evaluation loop to store metrics for each batch. Prediction/evaluation loop, shared by
+        `Trainer.evaluate()` and `Trainer.predict()`.
+
+        Works both with or without labels.
+        """
+
+        # Sample and save to game log if requested (for one batch to save time)
+        if self.generate_during_eval:
+            # Generate random indices within the range of the total number of samples
+            num_samples = len(dataloader.dataset)
+            random_indices = random.sample(range(num_samples), k=self.args.eval_batch_size)
+
+            # Use dataloader.dataset.select to get the random batch without iterating over the DataLoader
+            random_batch_dataset = dataloader.dataset.select(random_indices)
+            random_batch = self.data_collator(random_batch_dataset)
+            random_batch = self._prepare_inputs(random_batch)
+
+            policy_output_decoded = self.generate_from_model(self.model, random_batch)
+
+            table = pd.DataFrame(
+                columns=["Prompt", "Policy"],
+                data=[
+                    [prompt, pol[len(prompt) :]] for prompt, pol in zip(random_batch["prompt"], policy_output_decoded)
+                ],
+            )
+            if "wandb" in self.args.report_to:
+                wandb.log({"game_log": wandb.Table(data=table)})
+
+            if "comet_ml" in self.args.report_to:
+                log_table_to_comet_experiment(
+                    name="game_log.csv",
+                    table=table,
+                )
+
+        # Base evaluation
+        initial_output = super().evaluation_loop(
+            dataloader, description, prediction_loss_only, ignore_keys, metric_key_prefix
+        )
+
+        return initial_output
+
+    def log(self, logs: dict[str, float], start_time: Optional[float] = None) -> None:
+        """
+        Log `logs` on the various objects watching training, including stored metrics.
+
+        Args:
+            logs (`dict[str, float]`):
+                The values to log.
+            start_time (`float` or `None`, *optional*, defaults to `None`):
+                Start time of the training.
+        """
+        # logs either has 'loss' or 'eval_loss'
+        train_eval = "train" if "loss" in logs else "eval"
+        # Add averaged stored metrics to logs
+        for key, metrics in self._stored_metrics[train_eval].items():
+            logs[key] = torch.tensor(metrics).mean().item()
+        del self._stored_metrics[train_eval]
+        return super().log(logs, start_time)
+
+    def _shift_right(self, input_ids):
+        if self.decoder_start_token_id is None:
+            raise ValueError(
+                "model.config.decoder_start_token_id has to be defined. It is usually set to the pad_token_id."
+            )
+
+        # shift inputs to the right
+        if is_torch_fx_proxy(input_ids):
+            # Item assignment is not supported natively for proxies.
+            shifted_input_ids = torch.full(input_ids.shape[:-1] + (1,), self.decoder_start_token_id)
+            shifted_input_ids = torch.cat([shifted_input_ids, input_ids[..., :-1]], dim=-1)
+        else:
+            shifted_input_ids = input_ids.new_zeros(input_ids.shape)
+            shifted_input_ids[..., 1:] = input_ids[..., :-1].clone()
+            shifted_input_ids[..., 0] = self.decoder_start_token_id
+
+        if self.pad_token_id is None:
+            raise ValueError("model.config.pad_token_id has to be defined.")
+        # replace possible -100 values in labels by `pad_token_id`
+        shifted_input_ids.masked_fill_(shifted_input_ids == -100, self.pad_token_id)
+
+        return shifted_input_ids
+
+    # Ensure the model card is saved along with the checkpoint
+    def _save_checkpoint(self, model, trial):
+        if self.args.hub_model_id is None:
+            model_name = Path(self.args.output_dir).name
+        else:
+            model_name = self.args.hub_model_id.split("/")[-1]
+        self.create_model_card(model_name=model_name)
+        super()._save_checkpoint(model, trial)
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        citation = textwrap.dedent("""\
+        @inproceedings{xu2024contrastive,
+            title        = {{Contrastive Preference Optimization: Pushing the Boundaries of LLM Performance in Machine Translation}},
+            author       = {Haoran Xu and Amr Sharaf and Yunmo Chen and Weiting Tan and Lingfeng Shen and Benjamin Van Durme and Kenton Murray and Young Jin Kim},
+            year         = 2024,
+            booktitle    = {Forty-first International Conference on Machine Learning, {ICML} 2024, Vienna, Austria, July 21-27, 2024},
+            publisher    = {OpenReview.net},
+            url          = {https://openreview.net/forum?id=51iwkioZpn}
+        }""")
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="CPO",
+            trainer_citation=citation,
+            paper_title="Contrastive Preference Optimization: Pushing the Boundaries of LLM Performance in Machine Translation",
+            paper_id="2401.08417",
+        )
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothCPOTrainer(_UnslothCPOTrainer):
+    """
+    
+    Initialize CPOTrainer.
+
+    Args:
+        model (`transformers.PreTrainedModel`):
+            The model to train, preferably an `AutoModelForSequenceClassification`.
+        args (`CPOConfig`):
+            The CPO config arguments to use for training.
+        data_collator (`transformers.DataCollator`):
+            The data collator to use for training. If None is specified, the default data collator
+            (`DPODataCollatorWithPadding`) will be used which will pad the sequences to the maximum length of the
+            sequences in the batch, given a dataset of paired sequences.
+        train_dataset (`datasets.Dataset`):
+            The dataset to use for training.
+        eval_dataset (`datasets.Dataset`):
+            The dataset to use for evaluation.
+        processing_class ([`~transformers.PreTrainedTokenizerBase`], [`~transformers.BaseImageProcessor`], [`~transformers.FeatureExtractionMixin`] or [`~transformers.ProcessorMixin`], *optional*, defaults to `None`):
+            Processing class used to process the data. If provided, will be used to automatically process the inputs
+            for the model, and it will be saved along the model to make it easier to rerun an interrupted training or
+            reuse the fine-tuned model.
+        model_init (`Callable[[], transformers.PreTrainedModel]`):
+            The model initializer to use for training. If None is specified, the default model initializer will be
+            used.
+        callbacks (`list[transformers.TrainerCallback]`):
+            The callbacks to use for training.
+        optimizers (`tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR]`):
+            The optimizer and scheduler to use for training.
+        preprocess_logits_for_metrics (`Callable[[torch.Tensor, torch.Tensor], torch.Tensor]`):
+            The function to use to preprocess the logits before computing the metrics.
+        peft_config (`dict`, defaults to `None`):
+            The PEFT configuration to use for training. If you pass a PEFT configuration, the model will be wrapped in
+            a PEFT model.
+        compute_metrics (`Callable[[EvalPrediction], dict]`, *optional*):
+            The function to use to compute the metrics. Must take a `EvalPrediction` and return a dictionary string to
+            metric values.
+    
+    """
+    def __init__(
+        self,
+        model = None,
+        args = None,
+        data_collator = None,
+        train_dataset = None,
+        eval_dataset = None,
+        processing_class = None,
+        model_init = None,
+        callbacks = None,
+        preprocess_logits_for_metrics = None,
+        peft_config = None,
+        compute_metrics = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothCPOConfig()
+        use_bf16 = getattr(args, 'bf16', False)
+        if type(use_bf16) is not bool: use_bf16 = False
+        use_fp16 = getattr(args, 'fp16', False)
+        if type(use_fp16) is not bool: use_fp16 = False
+        force_float32 = False
+        if os.environ.get('UNSLOTH_FORCE_FLOAT32', '0') == '1':
+            print('Unsloth: Switching to float32 training since model cannot work with float16')
+            force_float32 = True
+        mixed_precision_dtype = os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32')
+        dtype = getattr(model.config, 'torch_dtype', None)
+        if dtype is None: dtype = model.get_input_embeddings().dtype
+        from unsloth_zoo.utils import _get_dtype
+        dtype = _get_dtype(dtype)
+        float16 = dtype == torch.float16
+        if not force_float32 and (float16 and use_bf16): raise TypeError('Unsloth: Model is in float16 precision but you want to use bfloat16 precision. Set fp16 to `True` and bf16 to `False`')
+        if not force_float32 and (not float16 and use_fp16): raise TypeError('Unsloth: Model is in bfloat16 precision but you want to use float16 precision. Set fp16 to `False` and bf16 to `True`')
+        if force_float32:
+            args.fp16 = False
+            args.bf16 = False
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'no'
+        elif (not use_bf16 and not use_fp16) and mixed_precision_dtype == 'float32':
+            args.fp16 = float16
+            args.bf16 = not float16
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'fp16' if float16 else 'bf16'
+        if getattr(args, 'eval_dataset', None) is not None and getattr(args, 'eval_strategy', 'no') == 'no':
+            args.eval_strategy = 'steps'
+            if getattr(args, 'eval_steps', None) is None: args.eval_steps = 0.1
+        ga_steps = getattr(args, 'gradient_accumulation_steps', None)
+        if ga_steps is not None and ga_steps > 1:
+            from transformers import __version__ as transformers_version
+            if Version(transformers_version) <= Version('4.45.2'):
+                print('**** Unsloth: Please use our fixed gradient_accumulation_steps by updating transformers, TRL and Unsloth!\n'
+                      '`pip install --upgrade --no-cache-dir --force-reinstall --no-deps unsloth transformers trl unsloth_zoo`')
+        if getattr(args, 'eval_strategy', 'no') != 'no':
+            eval_bsz = getattr(args, 'per_device_eval_batch_size', 8)
+            if eval_bsz == 8 and args.per_device_train_batch_size < eval_bsz: args.per_device_eval_batch_size = args.per_device_train_batch_size
+            if getattr(args, 'eval_accumulation_steps', None) is None and ga_steps is not None: args.eval_accumulation_steps = ga_steps
+        fp16_full_eval = getattr(args, 'fp16_full_eval', False)
+        if type(fp16_full_eval) is not bool: fp16_full_eval = False
+        bf16_full_eval = getattr(args, 'bf16_full_eval', False)
+        if type(bf16_full_eval) is not bool: bf16_full_eval = False
+        if args.fp16 and bf16_full_eval: args.bf16_full_eval = False; args.fp16_full_eval = True
+        if args.bf16 and fp16_full_eval: args.bf16_full_eval = True; args.fp16_full_eval = False
+        if force_float32:
+            args.bf16_full_eval = False
+            args.fp16_full_eval = False
+        elif os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32') == 'bfloat16':
+            args.bf16_full_eval = True
+            args.fp16_full_eval = False
+        elif not bf16_full_eval and not fp16_full_eval:
+            args.bf16_full_eval = args.bf16
+            args.fp16_full_eval = args.fp16
+        _output_logits = False
+        if locals().get('compute_metrics', None) is not None: _output_logits = True
+        if locals().get('preprocess_logits_for_metrics', None) is not None: _output_logits = True
+        if _output_logits:
+            os.environ['UNSLOTH_RETURN_LOGITS'] = '1'
+        if 'max_seq_length' not in locals() and not hasattr(args, 'max_seq_length'):
+            pass
+        else:
+            model_max_seq_length = getattr(model, 'max_seq_length', None)
+            args_max_seq_length  = getattr(args,  'max_seq_length', None)
+            if args_max_seq_length is None and model_max_seq_length is not None:
+                max_seq_length = model.max_seq_length
+                if hasattr(args, 'max_seq_length'): args.max_seq_length = max_seq_length
+        if model is not None and hasattr(model, 'for_training'):
+            model.for_training()
+        if 'tokenizer' in locals() and hasattr(tokenizer, 'padding_side'): tokenizer.padding_side = 'right'
+        if 'processing_class' in locals():
+            if hasattr(processing_class, 'padding_side'): processing_class.padding_side = 'right'
+            if hasattr(processing_class, 'tokenizer') and hasattr(processing_class.tokenizer, 'padding_side'): processing_class.tokenizer.padding_side = 'right'
+        __tokenizer = processing_class if 'processing_class' in locals() else tokenizer
+        from unsloth_zoo.vision_utils import UnslothVisionDataCollator
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if isinstance(data_collator, DataCollatorForSeq2Seq) and 'labels' not in train_dataset.column_names:
+                data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False, mlm_probability = 0.0)
+            elif isinstance(data_collator, TransformersDataCollatorForLanguageModeling) and 'labels' in train_dataset.column_names:
+                data_collator = DataCollatorForSeq2Seq(__tokenizer)
+        else:
+            if hasattr(args, 'remove_unused_columns'): args.remove_unused_columns = False
+            if hasattr(args, 'dataset_text_field'): args.dataset_text_field = ''
+            if hasattr(args, 'dataset_kwargs'): args.dataset_kwargs = {'skip_prepare_dataset': True}
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if not hasattr(__tokenizer, 'pad') and hasattr(__tokenizer, 'tokenizer'):
+                if isinstance(data_collator, DataCollatorForSeq2Seq):
+                    data_collator = DataCollatorForSeq2Seq(__tokenizer.tokenizer)
+                else:
+                    data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False, mlm_probability = 0.0)
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('cpo_trainer', other_metrics)
+        
+        super().__init__(
+            model = model,
+            args = args,
+            data_collator = data_collator,
+            train_dataset = train_dataset,
+            eval_dataset = eval_dataset,
+            processing_class = processing_class,
+            model_init = model_init,
+            callbacks = callbacks,
+            preprocess_logits_for_metrics = preprocess_logits_for_metrics,
+            peft_config = peft_config,
+            compute_metrics = compute_metrics,**kwargs)
+        if hasattr(self, 'neftune_hook_handle'):
+            self.neftune_hook_handle.remove()
+            if hasattr(self, 'neftune_hook_handle'): del self.neftune_hook_handle
+        if getattr(args, 'neftune_noise_alpha', None) is not None:
+            model.get_input_embeddings().neftune_noise_alpha = self.neftune_noise_alpha
+        pass
+        if hasattr(self, 'accelerator'):
+            scaler = self.accelerator.scaler
+            current_model = model
+            while hasattr(current_model, 'model'):
+                current_model.accelerator_scaler = scaler
+                current_model = current_model.model
+            current_model.accelerator_scaler = scaler
+        pass
+        
+pass

unsloth_compiled_cache/UnslothDDPOTrainer.py

@@ -0,0 +1,914 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.ddpo_trainer import (Accelerator, Any, Callable, DDPOConfig, DDPOStableDiffusionPipeline, DDPOTrainer, Optional, Path, PerPromptStatTracker, ProjectConfiguration, PyTorchModelHubMixin, Union, defaultdict, futures, generate_model_card, get_comet_experiment_url, is_wandb_available, logger, os, set_seed, textwrap, torch, wandb, warnings)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothDDPOConfig(DDPOConfig):
+    """
+    
+    Configuration class for the [`DDPOTrainer`].
+
+    Using [`~transformers.HfArgumentParser`] we can turn this class into
+    [argparse](https://docs.python.org/3/library/argparse#module-argparse) arguments that can be specified on the
+    command line.
+
+    Parameters:
+        exp_name (`str`, *optional*, defaults to `os.path.basename(sys.argv[0])[: -len(".py")]`):
+            Name of this experiment (by default is the file name without the extension name).
+        run_name (`str`, *optional*, defaults to `""`):
+            Name of this run.
+        seed (`int`, *optional*, defaults to `0`):
+            Random seed.
+        log_with (`Literal["wandb", "tensorboard"]]` or `None`, *optional*, defaults to `None`):
+            Log with either 'wandb' or 'tensorboard', check
+            https://huggingface.co/docs/accelerate/usage_guides/tracking for more details.
+        tracker_kwargs (`Dict`, *optional*, defaults to `{}`):
+            Keyword arguments for the tracker (e.g. wandb_project).
+        accelerator_kwargs (`Dict`, *optional*, defaults to `{}`):
+            Keyword arguments for the accelerator.
+        project_kwargs (`Dict`, *optional*, defaults to `{}`):
+            Keyword arguments for the accelerator project config (e.g. `logging_dir`).
+        tracker_project_name (`str`, *optional*, defaults to `"trl"`):
+            Name of project to use for tracking.
+        logdir (`str`, *optional*, defaults to `"logs"`):
+            Top-level logging directory for checkpoint saving.
+        num_epochs (`int`, *optional*, defaults to `100`):
+            Number of epochs to train.
+        save_freq (`int`, *optional*, defaults to `1`):
+            Number of epochs between saving model checkpoints.
+        num_checkpoint_limit (`int`, *optional*, defaults to `5`):
+            Number of checkpoints to keep before overwriting old ones.
+        mixed_precision (`str`, *optional*, defaults to `"fp16"`):
+            Mixed precision training.
+        allow_tf32 (`bool`, *optional*, defaults to `True`):
+            Allow `tf32` on Ampere GPUs.
+        resume_from (`str`, *optional*, defaults to `""`):
+            Resume training from a checkpoint.
+        sample_num_steps (`int`, *optional*, defaults to `50`):
+            Number of sampler inference steps.
+        sample_eta (`float`, *optional*, defaults to `1.0`):
+            Eta parameter for the DDIM sampler.
+        sample_guidance_scale (`float`, *optional*, defaults to `5.0`):
+            Classifier-free guidance weight.
+        sample_batch_size (`int`, *optional*, defaults to `1`):
+            Batch size (per GPU) to use for sampling.
+        sample_num_batches_per_epoch (`int`, *optional*, defaults to `2`):
+            Number of batches to sample per epoch.
+        train_batch_size (`int`, *optional*, defaults to `1`):
+            Batch size (per GPU) to use for training.
+        train_use_8bit_adam (`bool`, *optional*, defaults to `False`):
+            Use 8bit Adam optimizer from bitsandbytes.
+        train_learning_rate (`float`, *optional*, defaults to `3e-4`):
+            Learning rate.
+        train_adam_beta1 (`float`, *optional*, defaults to `0.9`):
+            Adam beta1.
+        train_adam_beta2 (`float`, *optional*, defaults to `0.999`):
+            Adam beta2.
+        train_adam_weight_decay (`float`, *optional*, defaults to `1e-4`):
+            Adam weight decay.
+        train_adam_epsilon (`float`, *optional*, defaults to `1e-8`):
+            Adam epsilon.
+        train_gradient_accumulation_steps (`int`, *optional*, defaults to `1`):
+            Number of gradient accumulation steps.
+        train_max_grad_norm (`float`, *optional*, defaults to `1.0`):
+            Maximum gradient norm for gradient clipping.
+        train_num_inner_epochs (`int`, *optional*, defaults to `1`):
+            Number of inner epochs per outer epoch.
+        train_cfg (`bool`, *optional*, defaults to `True`):
+            Whether to use classifier-free guidance during training.
+        train_adv_clip_max (`float`, *optional*, defaults to `5.0`):
+            Clip advantages to the range.
+        train_clip_range (`float`, *optional*, defaults to `1e-4`):
+            PPO clip range.
+        train_timestep_fraction (`float`, *optional*, defaults to `1.0`):
+            Fraction of timesteps to train on.
+        per_prompt_stat_tracking (`bool`, *optional*, defaults to `False`):
+            Whether to track statistics for each prompt separately.
+        per_prompt_stat_tracking_buffer_size (`int`, *optional*, defaults to `16`):
+            Number of reward values to store in the buffer for each prompt.
+        per_prompt_stat_tracking_min_count (`int`, *optional*, defaults to `16`):
+            Minimum number of reward values to store in the buffer.
+        async_reward_computation (`bool`, *optional*, defaults to `False`):
+            Whether to compute rewards asynchronously.
+        max_workers (`int`, *optional*, defaults to `2`):
+            Maximum number of workers to use for async reward computation.
+        negative_prompts (`str`, *optional*, defaults to `""`):
+            Comma-separated list of prompts to use as negative examples.
+        push_to_hub (`bool`, *optional*, defaults to `False`):
+            Whether to push the final model checkpoint to the Hub.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    
+    def __init__(
+        self,
+        exp_name = 'colab_kernel_launcher',
+        run_name = '',
+        seed = 3407,
+        log_with = None,
+        tracker_project_name = 'trl',
+        logdir = 'logs',
+        num_epochs = 100,
+        save_freq = 1,
+        num_checkpoint_limit = 5,
+        mixed_precision = 'fp16',
+        allow_tf32 = True,
+        resume_from = '',
+        sample_num_steps = 50,
+        sample_eta = 1.0,
+        sample_guidance_scale = 5.0,
+        sample_batch_size = 1,
+        sample_num_batches_per_epoch = 2,
+        train_batch_size = 1,
+        train_use_8bit_adam = False,
+        train_learning_rate = 5e-05,
+        train_adam_beta1 = 0.9,
+        train_adam_beta2 = 0.999,
+        train_adam_weight_decay = 0.01,
+        train_adam_epsilon = 1e-08,
+        train_gradient_accumulation_steps = 2,
+        train_max_grad_norm = 1.0,
+        train_num_inner_epochs = 1,
+        train_cfg = True,
+        train_adv_clip_max = 5.0,
+        train_clip_range = 0.0001,
+        train_timestep_fraction = 1.0,
+        per_prompt_stat_tracking = False,
+        per_prompt_stat_tracking_buffer_size = 16,
+        per_prompt_stat_tracking_min_count = 16,
+        async_reward_computation = False,
+        max_workers = 2,
+        negative_prompts = '',
+        push_to_hub = False,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        
+        **kwargs,
+    ):
+        
+        super().__init__(
+            exp_name = exp_name,
+            run_name = run_name,
+            seed = seed,
+            log_with = log_with,
+            tracker_project_name = tracker_project_name,
+            logdir = logdir,
+            num_epochs = num_epochs,
+            save_freq = save_freq,
+            num_checkpoint_limit = num_checkpoint_limit,
+            mixed_precision = mixed_precision,
+            allow_tf32 = allow_tf32,
+            resume_from = resume_from,
+            sample_num_steps = sample_num_steps,
+            sample_eta = sample_eta,
+            sample_guidance_scale = sample_guidance_scale,
+            sample_batch_size = sample_batch_size,
+            sample_num_batches_per_epoch = sample_num_batches_per_epoch,
+            train_batch_size = train_batch_size,
+            train_use_8bit_adam = train_use_8bit_adam,
+            train_learning_rate = train_learning_rate,
+            train_adam_beta1 = train_adam_beta1,
+            train_adam_beta2 = train_adam_beta2,
+            train_adam_weight_decay = train_adam_weight_decay,
+            train_adam_epsilon = train_adam_epsilon,
+            train_gradient_accumulation_steps = train_gradient_accumulation_steps,
+            train_max_grad_norm = train_max_grad_norm,
+            train_num_inner_epochs = train_num_inner_epochs,
+            train_cfg = train_cfg,
+            train_adv_clip_max = train_adv_clip_max,
+            train_clip_range = train_clip_range,
+            train_timestep_fraction = train_timestep_fraction,
+            per_prompt_stat_tracking = per_prompt_stat_tracking,
+            per_prompt_stat_tracking_buffer_size = per_prompt_stat_tracking_buffer_size,
+            per_prompt_stat_tracking_min_count = per_prompt_stat_tracking_min_count,
+            async_reward_computation = async_reward_computation,
+            max_workers = max_workers,
+            negative_prompts = negative_prompts,
+            push_to_hub = push_to_hub,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        
+pass
+
+class _UnslothDDPOTrainer(PyTorchModelHubMixin):
+    """"""
+
+    _tag_names = ["trl", "ddpo"]
+
+    def __init__(
+        self,
+        config: DDPOConfig,
+        reward_function: Callable[[torch.Tensor, tuple[str], tuple[Any]], torch.Tensor],
+        prompt_function: Callable[[], tuple[str, Any]],
+        sd_pipeline: DDPOStableDiffusionPipeline,
+        image_samples_hook: Optional[Callable[[Any, Any, Any], Any]] = None,
+    ):
+        warnings.warn(
+            "DDPOTrainer is deprecated and will be removed in version 0.23.0.",
+            DeprecationWarning,
+        )
+        if image_samples_hook is None:
+            warnings.warn("No image_samples_hook provided; no images will be logged")
+
+        self.prompt_fn = prompt_function
+        self.reward_fn = reward_function
+        self.config = config
+        self.image_samples_callback = image_samples_hook
+
+        accelerator_project_config = ProjectConfiguration(**self.config.project_kwargs)
+
+        if self.config.resume_from:
+            self.config.resume_from = os.path.normpath(os.path.expanduser(self.config.resume_from))
+            if "checkpoint_" not in os.path.basename(self.config.resume_from):
+                # get the most recent checkpoint in this directory
+                checkpoints = list(
+                    filter(
+                        lambda x: "checkpoint_" in x,
+                        os.listdir(self.config.resume_from),
+                    )
+                )
+                if len(checkpoints) == 0:
+                    raise ValueError(f"No checkpoints found in {self.config.resume_from}")
+                checkpoint_numbers = sorted([int(x.split("_")[-1]) for x in checkpoints])
+                self.config.resume_from = os.path.join(
+                    self.config.resume_from,
+                    f"checkpoint_{checkpoint_numbers[-1]}",
+                )
+
+                accelerator_project_config.iteration = checkpoint_numbers[-1] + 1
+
+        # number of timesteps within each trajectory to train on
+        self.num_train_timesteps = int(self.config.sample_num_steps * self.config.train_timestep_fraction)
+
+        self.accelerator = Accelerator(
+            log_with=self.config.log_with,
+            mixed_precision=self.config.mixed_precision,
+            project_config=accelerator_project_config,
+            # we always accumulate gradients across timesteps; we want config.train.gradient_accumulation_steps to be the
+            # number of *samples* we accumulate across, so we need to multiply by the number of training timesteps to get
+            # the total number of optimizer steps to accumulate across.
+            gradient_accumulation_steps=self.config.train_gradient_accumulation_steps * self.num_train_timesteps,
+            **self.config.accelerator_kwargs,
+        )
+
+        is_okay, message = self._config_check()
+        if not is_okay:
+            raise ValueError(message)
+
+        is_using_tensorboard = config.log_with is not None and config.log_with == "tensorboard"
+
+        if self.accelerator.is_main_process:
+            self.accelerator.init_trackers(
+                self.config.tracker_project_name,
+                config=dict(ddpo_trainer_config=config.to_dict()) if not is_using_tensorboard else config.to_dict(),
+                init_kwargs=self.config.tracker_kwargs,
+            )
+
+        logger.info(f"\n{config}")
+
+        set_seed(self.config.seed, device_specific=True)
+
+        self.sd_pipeline = sd_pipeline
+
+        self.sd_pipeline.set_progress_bar_config(
+            position=1,
+            disable=not self.accelerator.is_local_main_process,
+            leave=False,
+            desc="Timestep",
+            dynamic_ncols=True,
+        )
+
+        # For mixed precision training we cast all non-trainable weights [vae, non-lora text_encoder and non-lora unet] to half-precision
+        # as these weights are only used for inference, keeping weights in full precision is not required.
+        if self.accelerator.mixed_precision == "fp16":
+            inference_dtype = torch.float16
+        elif self.accelerator.mixed_precision == "bf16":
+            inference_dtype = torch.bfloat16
+        else:
+            inference_dtype = torch.float32
+
+        self.sd_pipeline.vae.to(self.accelerator.device, dtype=inference_dtype)
+        self.sd_pipeline.text_encoder.to(self.accelerator.device, dtype=inference_dtype)
+        self.sd_pipeline.unet.to(self.accelerator.device, dtype=inference_dtype)
+
+        trainable_layers = self.sd_pipeline.get_trainable_layers()
+
+        self.accelerator.register_save_state_pre_hook(self._save_model_hook)
+        self.accelerator.register_load_state_pre_hook(self._load_model_hook)
+
+        # Enable TF32 for faster training on Ampere GPUs,
+        # cf https://pytorch.org/docs/stable/notes/cuda.html#tensorfloat-32-tf32-on-ampere-devices
+        if self.config.allow_tf32:
+            torch.backends.cuda.matmul.allow_tf32 = True
+
+        self.optimizer = self._setup_optimizer(
+            trainable_layers.parameters() if not isinstance(trainable_layers, list) else trainable_layers
+        )
+
+        self.neg_prompt_embed = self.sd_pipeline.text_encoder(
+            self.sd_pipeline.tokenizer(
+                [""] if self.config.negative_prompts is None else self.config.negative_prompts,
+                return_tensors="pt",
+                padding="max_length",
+                truncation=True,
+                max_length=self.sd_pipeline.tokenizer.model_max_length,
+            ).input_ids.to(self.accelerator.device)
+        )[0]
+
+        if config.per_prompt_stat_tracking:
+            self.stat_tracker = PerPromptStatTracker(
+                config.per_prompt_stat_tracking_buffer_size,
+                config.per_prompt_stat_tracking_min_count,
+            )
+
+        # NOTE: for some reason, autocast is necessary for non-lora training but for lora training it isn't necessary and it uses
+        # more memory
+        self.autocast = self.sd_pipeline.autocast or self.accelerator.autocast
+
+        if hasattr(self.sd_pipeline, "use_lora") and self.sd_pipeline.use_lora:
+            unet, self.optimizer = self.accelerator.prepare(trainable_layers, self.optimizer)
+            self.trainable_layers = list(filter(lambda p: p.requires_grad, unet.parameters()))
+        else:
+            self.trainable_layers, self.optimizer = self.accelerator.prepare(trainable_layers, self.optimizer)
+
+        if self.config.async_reward_computation:
+            self.executor = futures.ThreadPoolExecutor(max_workers=config.max_workers)
+
+        if config.resume_from:
+            logger.info(f"Resuming from {config.resume_from}")
+            self.accelerator.load_state(config.resume_from)
+            self.first_epoch = int(config.resume_from.split("_")[-1]) + 1
+        else:
+            self.first_epoch = 0
+
+    def compute_rewards(self, prompt_image_pairs, is_async=False):
+        if not is_async:
+            rewards = []
+            for images, prompts, prompt_metadata in prompt_image_pairs:
+                reward, reward_metadata = self.reward_fn(images, prompts, prompt_metadata)
+                rewards.append(
+                    (
+                        torch.as_tensor(reward, device=self.accelerator.device),
+                        reward_metadata,
+                    )
+                )
+        else:
+            rewards = self.executor.map(lambda x: self.reward_fn(*x), prompt_image_pairs)
+            rewards = [
+                (torch.as_tensor(reward.result(), device=self.accelerator.device), reward_metadata.result())
+                for reward, reward_metadata in rewards
+            ]
+
+        return zip(*rewards)
+
+    def step(self, epoch: int, global_step: int):
+        """
+        Perform a single step of training.
+
+        Args:
+            epoch (int): The current epoch.
+            global_step (int): The current global step.
+
+        Side Effects:
+            - Model weights are updated
+            - Logs the statistics to the accelerator trackers.
+            - If `self.image_samples_callback` is not None, it will be called with the prompt_image_pairs, global_step,
+              and the accelerator tracker.
+
+        Returns:
+            global_step (int): The updated global step.
+
+        """
+        samples, prompt_image_data = self._generate_samples(
+            iterations=self.config.sample_num_batches_per_epoch,
+            batch_size=self.config.sample_batch_size,
+        )
+
+        # collate samples into dict where each entry has shape (num_batches_per_epoch * sample.batch_size, ...)
+        samples = {k: torch.cat([s[k] for s in samples]) for k in samples[0].keys()}
+        rewards, rewards_metadata = self.compute_rewards(
+            prompt_image_data, is_async=self.config.async_reward_computation
+        )
+
+        for i, image_data in enumerate(prompt_image_data):
+            image_data.extend([rewards[i], rewards_metadata[i]])
+
+        if self.image_samples_callback is not None:
+            self.image_samples_callback(prompt_image_data, global_step, self.accelerator.trackers[0])
+
+        rewards = torch.cat(rewards)
+        rewards = self.accelerator.gather(rewards).cpu().numpy()
+
+        self.accelerator.log(
+            {
+                "reward": rewards,
+                "epoch": epoch,
+                "reward_mean": rewards.mean(),
+                "reward_std": rewards.std(),
+            },
+            step=global_step,
+        )
+
+        if self.config.per_prompt_stat_tracking:
+            # gather the prompts across processes
+            prompt_ids = self.accelerator.gather(samples["prompt_ids"]).cpu().numpy()
+            prompts = self.sd_pipeline.tokenizer.batch_decode(prompt_ids, skip_special_tokens=True)
+            advantages = self.stat_tracker.update(prompts, rewards)
+        else:
+            advantages = (rewards - rewards.mean()) / (rewards.std() + 1e-8)
+
+        # ungather advantages;  keep the entries corresponding to the samples on this process
+        samples["advantages"] = (
+            torch.as_tensor(advantages)
+            .reshape(self.accelerator.num_processes, -1)[self.accelerator.process_index]
+            .to(self.accelerator.device)
+        )
+
+        del samples["prompt_ids"]
+
+        total_batch_size, num_timesteps = samples["timesteps"].shape
+
+        for inner_epoch in range(self.config.train_num_inner_epochs):
+            # shuffle samples along batch dimension
+            perm = torch.randperm(total_batch_size, device=self.accelerator.device)
+            samples = {k: v[perm] for k, v in samples.items()}
+
+            # shuffle along time dimension independently for each sample
+            # still trying to understand the code below
+            perms = torch.stack(
+                [torch.randperm(num_timesteps, device=self.accelerator.device) for _ in range(total_batch_size)]
+            )
+
+            for key in ["timesteps", "latents", "next_latents", "log_probs"]:
+                samples[key] = samples[key][
+                    torch.arange(total_batch_size, device=self.accelerator.device)[:, None],
+                    perms,
+                ]
+
+            original_keys = samples.keys()
+            original_values = samples.values()
+            # rebatch them as user defined train_batch_size is different from sample_batch_size
+            reshaped_values = [v.reshape(-1, self.config.train_batch_size, *v.shape[1:]) for v in original_values]
+
+            # Transpose the list of original values
+            transposed_values = zip(*reshaped_values)
+            # Create new dictionaries for each row of transposed values
+            samples_batched = [dict(zip(original_keys, row_values)) for row_values in transposed_values]
+
+            self.sd_pipeline.unet.train()
+            global_step = self._train_batched_samples(inner_epoch, epoch, global_step, samples_batched)
+            # ensure optimization step at the end of the inner epoch
+            if not self.accelerator.sync_gradients:
+                raise ValueError(
+                    "Optimization step should have been performed by this point. Please check calculated gradient accumulation settings."
+                )
+
+        if epoch != 0 and epoch % self.config.save_freq == 0 and self.accelerator.is_main_process:
+            self.accelerator.save_state()
+
+        return global_step
+
+    def calculate_loss(self, latents, timesteps, next_latents, log_probs, advantages, embeds):
+        """
+        Calculate the loss for a batch of an unpacked sample
+
+        Args:
+            latents (torch.Tensor):
+                The latents sampled from the diffusion model, shape: [batch_size, num_channels_latents, height, width]
+            timesteps (torch.Tensor):
+                The timesteps sampled from the diffusion model, shape: [batch_size]
+            next_latents (torch.Tensor):
+                The next latents sampled from the diffusion model, shape: [batch_size, num_channels_latents, height,
+                width]
+            log_probs (torch.Tensor):
+                The log probabilities of the latents, shape: [batch_size]
+            advantages (torch.Tensor):
+                The advantages of the latents, shape: [batch_size]
+            embeds (torch.Tensor):
+                The embeddings of the prompts, shape: [2*batch_size or batch_size, ...] Note: the "or" is because if
+                train_cfg is True, the expectation is that negative prompts are concatenated to the embeds
+
+        Returns:
+            loss (torch.Tensor), approx_kl (torch.Tensor), clipfrac (torch.Tensor) (all of these are of shape (1,))
+        """
+        with self.autocast():
+            if self.config.train_cfg:
+                noise_pred = self.sd_pipeline.unet(
+                    torch.cat([latents] * 2),
+                    torch.cat([timesteps] * 2),
+                    embeds,
+                ).sample
+                noise_pred_uncond, noise_pred_text = noise_pred.chunk(2)
+                noise_pred = noise_pred_uncond + self.config.sample_guidance_scale * (
+                    noise_pred_text - noise_pred_uncond
+                )
+            else:
+                noise_pred = self.sd_pipeline.unet(
+                    latents,
+                    timesteps,
+                    embeds,
+                ).sample
+            # compute the log prob of next_latents given latents under the current model
+
+            scheduler_step_output = self.sd_pipeline.scheduler_step(
+                noise_pred,
+                timesteps,
+                latents,
+                eta=self.config.sample_eta,
+                prev_sample=next_latents,
+            )
+
+            log_prob = scheduler_step_output.log_probs
+
+        advantages = torch.clamp(
+            advantages,
+            -self.config.train_adv_clip_max,
+            self.config.train_adv_clip_max,
+        )
+
+        ratio = torch.exp(log_prob - log_probs)
+
+        loss = self.loss(advantages, self.config.train_clip_range, ratio)
+
+        approx_kl = 0.5 * torch.mean((log_prob - log_probs) ** 2)
+
+        clipfrac = torch.mean((torch.abs(ratio - 1.0) > self.config.train_clip_range).float())
+
+        return loss, approx_kl, clipfrac
+
+    def loss(
+        self,
+        advantages: torch.Tensor,
+        clip_range: float,
+        ratio: torch.Tensor,
+    ):
+        unclipped_loss = -advantages * ratio
+        clipped_loss = -advantages * torch.clamp(
+            ratio,
+            1.0 - clip_range,
+            1.0 + clip_range,
+        )
+        return torch.mean(torch.maximum(unclipped_loss, clipped_loss))
+
+    def _setup_optimizer(self, trainable_layers_parameters):
+        if self.config.train_use_8bit_adam:
+            import bitsandbytes
+
+            optimizer_cls = bitsandbytes.optim.AdamW8bit
+        else:
+            optimizer_cls = torch.optim.AdamW
+
+        return optimizer_cls(
+            trainable_layers_parameters,
+            lr=self.config.train_learning_rate,
+            betas=(self.config.train_adam_beta1, self.config.train_adam_beta2),
+            weight_decay=self.config.train_adam_weight_decay,
+            eps=self.config.train_adam_epsilon,
+        )
+
+    def _save_model_hook(self, models, weights, output_dir):
+        self.sd_pipeline.save_checkpoint(models, weights, output_dir)
+        weights.pop()  # ensures that accelerate doesn't try to handle saving of the model
+
+    def _load_model_hook(self, models, input_dir):
+        self.sd_pipeline.load_checkpoint(models, input_dir)
+        models.pop()  # ensures that accelerate doesn't try to handle loading of the model
+
+    def _generate_samples(self, iterations, batch_size):
+        """
+        Generate samples from the model
+
+        Args:
+            iterations (int): Number of iterations to generate samples for
+            batch_size (int): Batch size to use for sampling
+
+        Returns:
+            samples (list[dict[str, torch.Tensor]]), prompt_image_pairs (list[list[Any]])
+        """
+        samples = []
+        prompt_image_pairs = []
+        self.sd_pipeline.unet.eval()
+
+        sample_neg_prompt_embeds = self.neg_prompt_embed.repeat(batch_size, 1, 1)
+
+        for _ in range(iterations):
+            prompts, prompt_metadata = zip(*[self.prompt_fn() for _ in range(batch_size)])
+
+            prompt_ids = self.sd_pipeline.tokenizer(
+                prompts,
+                return_tensors="pt",
+                padding="max_length",
+                truncation=True,
+                max_length=self.sd_pipeline.tokenizer.model_max_length,
+            ).input_ids.to(self.accelerator.device)
+            prompt_embeds = self.sd_pipeline.text_encoder(prompt_ids)[0]
+
+            with self.autocast():
+                sd_output = self.sd_pipeline(
+                    prompt_embeds=prompt_embeds,
+                    negative_prompt_embeds=sample_neg_prompt_embeds,
+                    num_inference_steps=self.config.sample_num_steps,
+                    guidance_scale=self.config.sample_guidance_scale,
+                    eta=self.config.sample_eta,
+                    output_type="pt",
+                )
+
+                images = sd_output.images
+                latents = sd_output.latents
+                log_probs = sd_output.log_probs
+
+            latents = torch.stack(latents, dim=1)  # (batch_size, num_steps + 1, ...)
+            log_probs = torch.stack(log_probs, dim=1)  # (batch_size, num_steps, 1)
+            timesteps = self.sd_pipeline.scheduler.timesteps.repeat(batch_size, 1)  # (batch_size, num_steps)
+
+            samples.append(
+                {
+                    "prompt_ids": prompt_ids,
+                    "prompt_embeds": prompt_embeds,
+                    "timesteps": timesteps,
+                    "latents": latents[:, :-1],  # each entry is the latent before timestep t
+                    "next_latents": latents[:, 1:],  # each entry is the latent after timestep t
+                    "log_probs": log_probs,
+                    "negative_prompt_embeds": sample_neg_prompt_embeds,
+                }
+            )
+            prompt_image_pairs.append([images, prompts, prompt_metadata])
+
+        return samples, prompt_image_pairs
+
+    def _train_batched_samples(self, inner_epoch, epoch, global_step, batched_samples):
+        """
+        Train on a batch of samples. Main training segment
+
+        Args:
+            inner_epoch (int): The current inner epoch
+            epoch (int): The current epoch
+            global_step (int): The current global step
+            batched_samples (list[dict[str, torch.Tensor]]): The batched samples to train on
+
+        Side Effects:
+            - Model weights are updated
+            - Logs the statistics to the accelerator trackers.
+
+        Returns:
+            global_step (int): The updated global step
+        """
+        info = defaultdict(list)
+        for _i, sample in enumerate(batched_samples):
+            if self.config.train_cfg:
+                # concat negative prompts to sample prompts to avoid two forward passes
+                embeds = torch.cat([sample["negative_prompt_embeds"], sample["prompt_embeds"]])
+            else:
+                embeds = sample["prompt_embeds"]
+
+            for j in range(self.num_train_timesteps):
+                with self.accelerator.accumulate(self.sd_pipeline.unet):
+                    loss, approx_kl, clipfrac = self.calculate_loss(
+                        sample["latents"][:, j],
+                        sample["timesteps"][:, j],
+                        sample["next_latents"][:, j],
+                        sample["log_probs"][:, j],
+                        sample["advantages"],
+                        embeds,
+                    )
+                    info["approx_kl"].append(approx_kl)
+                    info["clipfrac"].append(clipfrac)
+                    info["loss"].append(loss)
+
+                    self.accelerator.backward(loss)
+                    if self.accelerator.sync_gradients:
+                        self.accelerator.clip_grad_norm_(
+                            self.trainable_layers.parameters()
+                            if not isinstance(self.trainable_layers, list)
+                            else self.trainable_layers,
+                            self.config.train_max_grad_norm,
+                        )
+                    self.optimizer.step()
+                    self.optimizer.zero_grad()
+
+                # Checks if the accelerator has performed an optimization step behind the scenes
+                if self.accelerator.sync_gradients:
+                    # log training-related stuff
+                    info = {k: torch.mean(torch.stack(v)) for k, v in info.items()}
+                    info = self.accelerator.reduce(info, reduction="mean")
+                    info.update({"epoch": epoch, "inner_epoch": inner_epoch})
+                    self.accelerator.log(info, step=global_step)
+                    global_step += 1
+                    info = defaultdict(list)
+        return global_step
+
+    def _config_check(self) -> tuple[bool, str]:
+        samples_per_epoch = (
+            self.config.sample_batch_size * self.accelerator.num_processes * self.config.sample_num_batches_per_epoch
+        )
+        total_train_batch_size = (
+            self.config.train_batch_size
+            * self.accelerator.num_processes
+            * self.config.train_gradient_accumulation_steps
+        )
+
+        if not self.config.sample_batch_size >= self.config.train_batch_size:
+            return (
+                False,
+                f"Sample batch size ({self.config.sample_batch_size}) must be greater than or equal to the train batch size ({self.config.train_batch_size})",
+            )
+        if not self.config.sample_batch_size % self.config.train_batch_size == 0:
+            return (
+                False,
+                f"Sample batch size ({self.config.sample_batch_size}) must be divisible by the train batch size ({self.config.train_batch_size})",
+            )
+        if not samples_per_epoch % total_train_batch_size == 0:
+            return (
+                False,
+                f"Number of samples per epoch ({samples_per_epoch}) must be divisible by the total train batch size ({total_train_batch_size})",
+            )
+        return True, ""
+
+    def train(self, epochs: Optional[int] = None):
+        """
+        Train the model for a given number of epochs
+        """
+        global_step = 0
+        if epochs is None:
+            epochs = self.config.num_epochs
+        for epoch in range(self.first_epoch, epochs):
+            global_step = self.step(epoch, global_step)
+
+    def _save_pretrained(self, save_directory):
+        self.sd_pipeline.save_pretrained(save_directory)
+        self.create_model_card()
+
+    # Ensure the model card is saved along with the checkpoint
+    def _save_checkpoint(self, model, trial):
+        if self.args.hub_model_id is None:
+            model_name = Path(self.args.output_dir).name
+        else:
+            model_name = self.args.hub_model_id.split("/")[-1]
+        self.create_model_card(model_name=model_name)
+        super()._save_checkpoint(model, trial)
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        citation = textwrap.dedent("""\
+        @inproceedings{black2024training,
+            title        = {{Training Diffusion Models with Reinforcement Learning}},
+            author       = {Kevin Black and Michael Janner and Yilun Du and Ilya Kostrikov and Sergey Levine},
+            year         = 2024,
+            booktitle    = {The Twelfth International Conference on Learning Representations, {ICLR} 2024, Vienna, Austria, May 7-11, 2024},
+            publisher    = {OpenReview.net},
+            url          = {https://openreview.net/forum?id=YCWjhGrJFD},
+        }""")
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="DDPO",
+            trainer_citation=citation,
+            paper_title="Training Diffusion Models with Reinforcement Learning",
+            paper_id="2305.13301",
+        )
+
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothDDPOTrainer(_UnslothDDPOTrainer):
+    """
+    
+    The DDPOTrainer uses Deep Diffusion Policy Optimization to optimise diffusion models. Note, this trainer is heavily
+    inspired by the work here: https://github.com/kvablack/ddpo-pytorch As of now only Stable Diffusion based pipelines
+    are supported
+
+    Attributes:
+        **config** (`DDPOConfig`) -- Configuration object for DDPOTrainer. Check the documentation of `PPOConfig` for more:
+         details.
+        **reward_function** (Callable[[torch.Tensor, tuple[str], tuple[Any]], torch.Tensor]) -- Reward function to be used:
+        **prompt_function** (Callable[[], tuple[str, Any]]) -- Function to generate prompts to guide model
+        **sd_pipeline** (`DDPOStableDiffusionPipeline`) -- Stable Diffusion pipeline to be used for training.
+        **image_samples_hook** (Optional[Callable[[Any, Any, Any], Any]]) -- Hook to be called to log images
+    
+    """
+    def __init__(
+        self,
+        config,
+        reward_function,
+        prompt_function,
+        sd_pipeline,
+        image_samples_hook = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothDDPOConfig()
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('ddpo_trainer', other_metrics)
+        
+        super().__init__(
+            config = config,
+            reward_function = reward_function,
+            prompt_function = prompt_function,
+            sd_pipeline = sd_pipeline,
+            image_samples_hook = image_samples_hook,**kwargs)
+        
+pass
+
+
+if hasattr(logger, "addFilter"):
+    import logging
+    class HideLoggingMessage(logging.Filter):
+        def __init__(self, text): self.text = text
+        def filter(self, x): return not (self.text in x.getMessage())
+    pass
+    logger.addFilter(HideLoggingMessage("`use_cache=True`"))
+

unsloth_compiled_cache/UnslothGKDTrainer.py

@@ -0,0 +1,880 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.gkd_trainer import (Any, AutoModelForCausalLM, BaseImageProcessor, Callable, DataCollator, DataCollatorForChatML, Dataset, EvalPrediction, F, FeatureExtractionMixin, GKDConfig, GKDTrainer, GenerationConfig, Optional, PeftConfig, PreTrainedModel, PreTrainedTokenizerBase, ProcessorMixin, SFTTrainer, TrainerCallback, Union, disable_dropout_in_model, empty_cache, generate_model_card, get_comet_experiment_url, is_wandb_available, nn, os, prepare_deepspeed, random, textwrap, torch, unwrap_model_for_generation, wandb)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothGKDConfig(GKDConfig):
+    """
+    
+    Configuration class for [`GKDTrainer`].
+
+    This class includes only the parameters that are specific to GKD training. For a full list of training arguments,
+    please refer to the [`~transformers.TrainingArguments`] and [`SFTConfig`] documentation.
+
+    Args:
+        temperature (`float`, *optional*, defaults to `0.9`):
+            Temperature for sampling. The higher the temperature, the more random the completions.
+        lmbda (`float`, *optional*, defaults to `0.5`):
+            Lambda parameter that controls the student data fraction (i.e., the proportion of on-policy
+            student-generated outputs).
+        beta (`float`, *optional*, defaults to `0.5`):
+            Interpolation coefficient between `0.0` and `1.0` of the Generalized Jensen-Shannon Divergence loss. When
+            beta is `0.0`, the loss is the KL divergence. When beta is `1.0`, the loss is the Inverse KL Divergence.
+        max_new_tokens (`int`, *optional*, defaults to `128`):
+            Maximum number of tokens to generate per completion.
+        teacher_model_name_or_path (`str` or `None`, *optional*, defaults to `None`):
+            Model name or path of the teacher model. If `None`, the teacher model will be the same as the model being
+            trained.
+        teacher_model_init_kwargs (`dict[str, Any]]` or `None`, *optional*, defaults to `None`):
+            Keyword arguments to pass to `AutoModelForCausalLM.from_pretrained` when instantiating the teacher model
+            from a string.
+        disable_dropout (`bool`, *optional*, defaults to `True`):
+            Whether to disable dropout in the model.
+        seq_kd (`bool`, *optional*, defaults to `False`):
+            Seq_kd parameter that controls whether to perform Sequence-Level KD (can be viewed as supervised FT on
+            teacher-generated output).
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    max_seq_length : Optional[int] = field(
+        default = None,
+        metadata = {'help': 'Maximum sequence length to truncate to.'},
+    )
+    def __init__(
+        self,
+        output_dir = None,
+        overwrite_output_dir = None,
+        do_train = False,
+        do_eval = False,
+        do_predict = False,
+        eval_strategy = 'no',
+        prediction_loss_only = False,
+        per_device_train_batch_size = 4,
+        per_device_eval_batch_size = 4,
+        per_gpu_train_batch_size = None,
+        per_gpu_eval_batch_size = None,
+        gradient_accumulation_steps = 2,
+        eval_accumulation_steps = 2,
+        eval_delay = 0,
+        torch_empty_cache_steps = 250,
+        learning_rate = 5e-05,
+        weight_decay = 0.01,
+        adam_beta1 = 0.9,
+        adam_beta2 = 0.999,
+        adam_epsilon = 1e-08,
+        max_grad_norm = 1.0,
+        num_train_epochs = 3.0,
+        max_steps = -1,
+        lr_scheduler_type = 'linear',
+        warmup_ratio = 0.1,
+        warmup_steps = 0,
+        log_level = 'passive',
+        log_level_replica = 'warning',
+        log_on_each_node = True,
+        logging_dir = None,
+        logging_strategy = 'steps',
+        logging_first_step = False,
+        logging_steps = 1,
+        logging_nan_inf_filter = False,
+        save_strategy = 'steps',
+        save_steps = 500,
+        save_total_limit = None,
+        save_safetensors = True,
+        save_on_each_node = False,
+        save_only_model = False,
+        restore_callback_states_from_checkpoint = False,
+        no_cuda = False,
+        use_cpu = False,
+        use_mps_device = False,
+        seed = 3407,
+        data_seed = 3407,
+        jit_mode_eval = False,
+        use_ipex = False,
+        bf16 = False,
+        fp16 = False,
+        fp16_opt_level = 'O1',
+        half_precision_backend = 'auto',
+        bf16_full_eval = False,
+        fp16_full_eval = False,
+        tf32 = None,
+        local_rank = -1,
+        ddp_backend = None,
+        tpu_num_cores = None,
+        tpu_metrics_debug = False,
+        debug = '',
+        dataloader_drop_last = False,
+        eval_steps = None,
+        dataloader_num_workers = 0,
+        dataloader_prefetch_factor = None,
+        past_index = -1,
+        run_name = None,
+        disable_tqdm = None,
+        remove_unused_columns = True,
+        label_names = None,
+        load_best_model_at_end = False,
+        metric_for_best_model = None,
+        greater_is_better = None,
+        ignore_data_skip = False,
+        fsdp = '',
+        fsdp_min_num_params = 0,
+        fsdp_config = None,
+        fsdp_transformer_layer_cls_to_wrap = None,
+        accelerator_config = None,
+        deepspeed = None,
+        label_smoothing_factor = 0.0,
+        optim = 'adamw_8bit',
+        optim_args = None,
+        adafactor = False,
+        group_by_length = False,
+        length_column_name = 'length',
+        report_to = None,
+        ddp_find_unused_parameters = None,
+        ddp_bucket_cap_mb = None,
+        ddp_broadcast_buffers = None,
+        dataloader_pin_memory = True,
+        dataloader_persistent_workers = False,
+        skip_memory_metrics = True,
+        use_legacy_prediction_loop = False,
+        push_to_hub = False,
+        resume_from_checkpoint = None,
+        hub_model_id = None,
+        hub_strategy = 'every_save',
+        hub_token = None,
+        hub_private_repo = None,
+        hub_always_push = False,
+        hub_revision = None,
+        gradient_checkpointing = False,
+        gradient_checkpointing_kwargs = None,
+        include_inputs_for_metrics = False,
+        eval_do_concat_batches = True,
+        fp16_backend = 'auto',
+        push_to_hub_model_id = None,
+        push_to_hub_organization = None,
+        push_to_hub_token = None,
+        mp_parameters = '',
+        auto_find_batch_size = True,
+        full_determinism = False,
+        torchdynamo = None,
+        ray_scope = 'last',
+        ddp_timeout = 1800,
+        torch_compile = False,
+        torch_compile_backend = None,
+        torch_compile_mode = None,
+        include_tokens_per_second = False,
+        include_num_input_tokens_seen = False,
+        neftune_noise_alpha = None,
+        optim_target_modules = None,
+        batch_eval_metrics = False,
+        eval_on_start = False,
+        use_liger_kernel = False,
+        liger_kernel_config = None,
+        eval_use_gather_object = False,
+        average_tokens_across_devices = True,
+        model_init_kwargs = None,
+        chat_template_path = None,
+        dataset_text_field = 'text',
+        dataset_kwargs = None,
+        dataset_num_proc = None,
+        eos_token = None,
+        pad_token = None,
+        max_length = 1024,
+        packing = False,
+        packing_strategy = 'bfd',
+        padding_free = False,
+        pad_to_multiple_of = None,
+        eval_packing = None,
+        completion_only_loss = None,
+        assistant_only_loss = False,
+        activation_offloading = False,
+        temperature = 0.9,
+        lmbda = 0.5,
+        beta = 0.5,
+        max_new_tokens = 128,
+        teacher_model_name_or_path = None,
+        teacher_model_init_kwargs = None,
+        disable_dropout = True,
+        seq_kd = False,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        max_seq_length = None,
+        **kwargs,
+    ):
+        if learning_rate < 1e-7: raise FloatingPointError(f'Unsloth: Your learning rate of `{learning_rate}` is too small and less than 1e-7! Consider increasing it, otherwise gradient updates will be close to 0!')
+        if learning_rate > 1: raise OverflowError(f'Unsloth: Your learning rate of `{learning_rate}` is way too larger > 1! Consider decreasing it to 1e-1, otherwise gradient updates will explode!')
+        if output_dir is None and save_strategy == 'steps' and save_steps == 500:
+            output_dir = 'unsloth_training_checkpoints'
+            save_strategy = 'no'
+        if dataset_num_proc is None:
+            from multiprocessing import cpu_count
+            dataset_num_proc = min(cpu_count()*2, 2)
+        if temperature <= 0:
+            raise MathError('Unsloth: Please set a positive non-zero temperature since your results will be wrong.')
+        elif temperature >= 10:
+            raise MathError('Unsloth: Please set a positive non-zero temperature less than 10, since sampling will be quite erratic.')
+        
+        
+        super().__init__(
+            output_dir = output_dir,
+            overwrite_output_dir = overwrite_output_dir,
+            do_train = do_train,
+            do_eval = do_eval,
+            do_predict = do_predict,
+            eval_strategy = eval_strategy,
+            prediction_loss_only = prediction_loss_only,
+            per_device_train_batch_size = per_device_train_batch_size,
+            per_device_eval_batch_size = per_device_eval_batch_size,
+            per_gpu_train_batch_size = per_gpu_train_batch_size,
+            per_gpu_eval_batch_size = per_gpu_eval_batch_size,
+            gradient_accumulation_steps = gradient_accumulation_steps,
+            eval_accumulation_steps = eval_accumulation_steps,
+            eval_delay = eval_delay,
+            torch_empty_cache_steps = torch_empty_cache_steps,
+            learning_rate = learning_rate,
+            weight_decay = weight_decay,
+            adam_beta1 = adam_beta1,
+            adam_beta2 = adam_beta2,
+            adam_epsilon = adam_epsilon,
+            max_grad_norm = max_grad_norm,
+            num_train_epochs = num_train_epochs,
+            max_steps = max_steps,
+            lr_scheduler_type = lr_scheduler_type,
+            warmup_ratio = warmup_ratio,
+            warmup_steps = warmup_steps,
+            log_level = log_level,
+            log_level_replica = log_level_replica,
+            log_on_each_node = log_on_each_node,
+            logging_dir = logging_dir,
+            logging_strategy = logging_strategy,
+            logging_first_step = logging_first_step,
+            logging_steps = logging_steps,
+            logging_nan_inf_filter = logging_nan_inf_filter,
+            save_strategy = save_strategy,
+            save_steps = save_steps,
+            save_total_limit = save_total_limit,
+            save_safetensors = save_safetensors,
+            save_on_each_node = save_on_each_node,
+            save_only_model = save_only_model,
+            restore_callback_states_from_checkpoint = restore_callback_states_from_checkpoint,
+            no_cuda = no_cuda,
+            use_cpu = use_cpu,
+            use_mps_device = use_mps_device,
+            seed = seed,
+            data_seed = data_seed,
+            jit_mode_eval = jit_mode_eval,
+            use_ipex = use_ipex,
+            bf16 = bf16,
+            fp16 = fp16,
+            fp16_opt_level = fp16_opt_level,
+            half_precision_backend = half_precision_backend,
+            bf16_full_eval = bf16_full_eval,
+            fp16_full_eval = fp16_full_eval,
+            tf32 = tf32,
+            local_rank = local_rank,
+            ddp_backend = ddp_backend,
+            tpu_num_cores = tpu_num_cores,
+            tpu_metrics_debug = tpu_metrics_debug,
+            debug = debug,
+            dataloader_drop_last = dataloader_drop_last,
+            eval_steps = eval_steps,
+            dataloader_num_workers = dataloader_num_workers,
+            dataloader_prefetch_factor = dataloader_prefetch_factor,
+            past_index = past_index,
+            run_name = run_name,
+            disable_tqdm = disable_tqdm,
+            remove_unused_columns = remove_unused_columns,
+            label_names = label_names,
+            load_best_model_at_end = load_best_model_at_end,
+            metric_for_best_model = metric_for_best_model,
+            greater_is_better = greater_is_better,
+            ignore_data_skip = ignore_data_skip,
+            fsdp = fsdp,
+            fsdp_min_num_params = fsdp_min_num_params,
+            fsdp_config = fsdp_config,
+            fsdp_transformer_layer_cls_to_wrap = fsdp_transformer_layer_cls_to_wrap,
+            accelerator_config = accelerator_config,
+            deepspeed = deepspeed,
+            label_smoothing_factor = label_smoothing_factor,
+            optim = optim,
+            optim_args = optim_args,
+            adafactor = adafactor,
+            group_by_length = group_by_length,
+            length_column_name = length_column_name,
+            report_to = report_to,
+            ddp_find_unused_parameters = ddp_find_unused_parameters,
+            ddp_bucket_cap_mb = ddp_bucket_cap_mb,
+            ddp_broadcast_buffers = ddp_broadcast_buffers,
+            dataloader_pin_memory = dataloader_pin_memory,
+            dataloader_persistent_workers = dataloader_persistent_workers,
+            skip_memory_metrics = skip_memory_metrics,
+            use_legacy_prediction_loop = use_legacy_prediction_loop,
+            push_to_hub = push_to_hub,
+            resume_from_checkpoint = resume_from_checkpoint,
+            hub_model_id = hub_model_id,
+            hub_strategy = hub_strategy,
+            hub_token = hub_token,
+            hub_private_repo = hub_private_repo,
+            hub_always_push = hub_always_push,
+            hub_revision = hub_revision,
+            gradient_checkpointing = gradient_checkpointing,
+            gradient_checkpointing_kwargs = gradient_checkpointing_kwargs,
+            include_inputs_for_metrics = include_inputs_for_metrics,
+            eval_do_concat_batches = eval_do_concat_batches,
+            fp16_backend = fp16_backend,
+            push_to_hub_model_id = push_to_hub_model_id,
+            push_to_hub_organization = push_to_hub_organization,
+            push_to_hub_token = push_to_hub_token,
+            mp_parameters = mp_parameters,
+            auto_find_batch_size = auto_find_batch_size,
+            full_determinism = full_determinism,
+            torchdynamo = torchdynamo,
+            ray_scope = ray_scope,
+            ddp_timeout = ddp_timeout,
+            torch_compile = torch_compile,
+            torch_compile_backend = torch_compile_backend,
+            torch_compile_mode = torch_compile_mode,
+            include_tokens_per_second = include_tokens_per_second,
+            include_num_input_tokens_seen = include_num_input_tokens_seen,
+            neftune_noise_alpha = neftune_noise_alpha,
+            optim_target_modules = optim_target_modules,
+            batch_eval_metrics = batch_eval_metrics,
+            eval_on_start = eval_on_start,
+            use_liger_kernel = use_liger_kernel,
+            liger_kernel_config = liger_kernel_config,
+            eval_use_gather_object = eval_use_gather_object,
+            average_tokens_across_devices = average_tokens_across_devices,
+            model_init_kwargs = model_init_kwargs,
+            chat_template_path = chat_template_path,
+            dataset_text_field = dataset_text_field,
+            dataset_kwargs = dataset_kwargs,
+            dataset_num_proc = dataset_num_proc,
+            eos_token = eos_token,
+            pad_token = pad_token,
+            max_length = max_length,
+            packing = packing,
+            packing_strategy = packing_strategy,
+            padding_free = padding_free,
+            pad_to_multiple_of = pad_to_multiple_of,
+            eval_packing = eval_packing,
+            completion_only_loss = completion_only_loss,
+            assistant_only_loss = assistant_only_loss,
+            activation_offloading = activation_offloading,
+            temperature = temperature,
+            lmbda = lmbda,
+            beta = beta,
+            max_new_tokens = max_new_tokens,
+            teacher_model_name_or_path = teacher_model_name_or_path,
+            teacher_model_init_kwargs = teacher_model_init_kwargs,
+            disable_dropout = disable_dropout,
+            seq_kd = seq_kd,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        self.max_seq_length = max_seq_length
+pass
+
+class _UnslothGKDTrainer(SFTTrainer):
+    _tag_names = ["trl", "gkd"]
+
+    def __init__(
+        self,
+        model: Optional[Union[PreTrainedModel, nn.Module, str]] = None,
+        teacher_model: Union[PreTrainedModel, nn.Module, str] = None,
+        args: Optional[GKDConfig] = None,
+        data_collator: Optional[DataCollator] = None,  # type: ignore
+        train_dataset: Optional[Dataset] = None,
+        eval_dataset: Optional[Union[Dataset, dict[str, Dataset]]] = None,
+        processing_class: Optional[
+            Union[PreTrainedTokenizerBase, BaseImageProcessor, FeatureExtractionMixin, ProcessorMixin]
+        ] = None,
+        compute_metrics: Optional[Callable[[EvalPrediction], dict]] = None,
+        callbacks: Optional[list[TrainerCallback]] = None,
+        optimizers: tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR] = (None, None),
+        preprocess_logits_for_metrics: Optional[Callable[[torch.Tensor, torch.Tensor], torch.Tensor]] = None,
+        peft_config: Optional["PeftConfig"] = None,
+        formatting_func: Optional[Callable] = None,
+    ):
+        # add remove_unused_columns=False to the dataclass args
+        args.remove_unused_columns = False
+        data_collator = DataCollatorForChatML(tokenizer=processing_class, max_length=args.max_length)
+
+        super().__init__(
+            model,
+            args=args,
+            data_collator=data_collator,
+            train_dataset=train_dataset,
+            eval_dataset=eval_dataset,
+            processing_class=processing_class,
+            compute_metrics=compute_metrics,
+            callbacks=callbacks,
+            optimizers=optimizers,
+            preprocess_logits_for_metrics=preprocess_logits_for_metrics,
+            peft_config=peft_config,
+            formatting_func=formatting_func,
+        )
+
+        if args.teacher_model_init_kwargs is None:
+            teacher_model_init_kwargs = {}
+        elif not isinstance(teacher_model, str):
+            raise ValueError(
+                "You passed teacher_model_init_kwargs to the GKDConfig, but your teacher_model is already instantiated."
+            )
+        else:
+            teacher_model_init_kwargs = args.teacher_model_init_kwargs
+            teacher_model_init_kwargs["torch_dtype"] = (
+                teacher_model_init_kwargs["torch_dtype"]
+                if teacher_model_init_kwargs["torch_dtype"] in ["auto", None]
+                else getattr(torch, teacher_model_init_kwargs["torch_dtype"])
+            )
+
+        if isinstance(teacher_model, str):
+            teacher_model = AutoModelForCausalLM.from_pretrained(teacher_model, **teacher_model_init_kwargs)
+
+        # Disable dropout in the model
+        if args.disable_dropout:
+            disable_dropout_in_model(self.model)
+
+        if self.is_deepspeed_enabled:
+            self.teacher_model = prepare_deepspeed(teacher_model, self.accelerator)
+        else:
+            self.teacher_model = self.accelerator.prepare_model(teacher_model, evaluation_mode=True)
+
+        self.lmbda = args.lmbda
+        self.beta = args.beta
+        self.temperature = args.temperature
+        self.seq_kd = args.seq_kd
+
+        self.generation_config = GenerationConfig(
+            max_new_tokens=args.max_new_tokens,
+            temperature=args.temperature,
+            do_sample=True,
+            top_k=0,
+            use_cache=False if args.gradient_checkpointing else True,
+            pad_token_id=self.processing_class.pad_token_id,
+        )
+        # Set custom EOS tokens if they are specified by the model's generation
+        # config. This is important for models with the Llama 3 chat template,
+        # which use special tokens <|eot_id|> and <|eom_id|> to mark the end of
+        # turns or messages.
+        if (
+            hasattr(self.model.generation_config, "eos_token_id")
+            and self.model.generation_config.eos_token_id is not None
+        ):
+            self.generation_config.eos_token_id = self.model.generation_config.eos_token_id
+
+    @staticmethod
+    def generalized_jsd_loss(
+        student_logits, teacher_logits, labels=None, beta=0.5, temperature=1.0, reduction="batchmean"
+    ):
+        """
+        Compute the generalized Jensen-Shannon Divergence loss for knowledge distillation using F.kl_div. See Eq. (1)
+        of https://huggingface.co/papers/2306.13649 for the definition.
+
+        Args:
+            student_logits:
+                Tensor of shape (batch_size, sequence_length, vocab_size)
+            teacher_logits:
+                Tensor of shape (batch_size, sequence_length, vocab_size)
+            labels:
+                Tensor of shape (batch_size, sequence_length) with -100 for padding tokens to ignore when computing
+                loss
+            beta:
+                Interpolation coefficient between 0 and 1 (default: 0.5)
+            temperature:
+                Softmax temperature (default: 1.0)
+            reduction:
+                Specifies the reduction to apply to the output (default: 'batchmean')
+
+        Returns:
+            loss: Scalar tensor with the generalized JSD loss
+        """
+
+        # Apply temperature scaling
+        student_logits = student_logits / temperature
+        teacher_logits = teacher_logits / temperature
+
+        # Compute log probabilities for student and probabilities for teacher
+        student_log_probs = F.log_softmax(student_logits, dim=-1)
+        teacher_log_probs = F.log_softmax(teacher_logits, dim=-1)
+
+        if beta == 0:
+            jsd = F.kl_div(student_log_probs, teacher_log_probs, reduction="none", log_target=True)
+        elif beta == 1:
+            jsd = F.kl_div(teacher_log_probs, student_log_probs, reduction="none", log_target=True)
+        else:
+            # Compute the log of the mixture distribution
+            # log(a + b) = log(exp(log(a)) + exp(log(b))) -> for mixture
+            beta = torch.tensor(beta, dtype=student_log_probs.dtype)
+            mixture_log_probs = torch.logsumexp(
+                torch.stack([student_log_probs + torch.log(1 - beta), teacher_log_probs + torch.log(beta)]),
+                dim=0,
+            )
+
+            # Compute KL divergences using F.kl_div
+            # PyTorch differs from the standard mathematical definition, so the order of the probability distributions is swapped compared to that defined in the paper.
+            kl_teacher = F.kl_div(mixture_log_probs, teacher_log_probs, reduction="none", log_target=True)
+            kl_student = F.kl_div(mixture_log_probs, student_log_probs, reduction="none", log_target=True)
+
+            # Compute the Generalized Jensen-Shannon Divergence
+            jsd = beta * kl_teacher + (1 - beta) * kl_student
+
+        # Masking
+        if labels is not None:
+            mask = labels != -100
+            jsd = jsd[mask]
+
+        # Apply reduction
+        if reduction == "batchmean":
+            return jsd.sum() / mask.sum() if labels is not None else jsd.sum() / (jsd.size(0) * jsd.size(1))
+        elif reduction == "sum":
+            return jsd.sum()
+        elif reduction == "mean":
+            return jsd.mean()
+        else:
+            return jsd
+
+    def compute_loss(self, model, inputs, return_outputs=False, num_items_in_batch=None):
+        # compute student output
+        outputs_student = model(
+            input_ids=inputs["input_ids"],
+            attention_mask=inputs["attention_mask"],
+        )
+
+        # compute teacher output in eval mode
+        self.teacher_model.eval()
+        with torch.no_grad():
+            outputs_teacher = self.teacher_model(
+                input_ids=inputs["input_ids"],
+                attention_mask=inputs["attention_mask"],
+            )
+
+        # slice the logits for the generated tokens using the inputs["prompts"] lengths
+        prompt_lengths = inputs["prompts"].shape[1]
+        shifted_student_logits = outputs_student.logits[:, prompt_lengths - 1 : -1, :]
+        shifted_teacher_logits = outputs_teacher.logits[:, prompt_lengths - 1 : -1, :]
+        shifted_labels = inputs["labels"][:, prompt_lengths:]
+
+        # compute loss
+        loss = self.generalized_jsd_loss(
+            student_logits=shifted_student_logits,
+            teacher_logits=shifted_teacher_logits,
+            labels=shifted_labels,
+            beta=self.beta,
+        )
+
+        # empty cache
+        empty_cache()
+
+        # Return loss
+        return (loss, outputs_student) if return_outputs else loss
+
+    @staticmethod
+    def generate_on_policy_outputs(model, inputs, generation_config, pad_token_id=None):
+        # Generate output with respect to the prompt-only
+        generated_outputs = model.generate(
+            input_ids=inputs["prompts"],
+            attention_mask=inputs.get("prompt_attention_mask", None),
+            generation_config=generation_config,
+            return_dict_in_generate=True,
+        )
+
+        # Get the generated token IDs
+        generated_tokens = generated_outputs.sequences
+        # Calculate new attention mask
+        new_attention_mask = torch.ones_like(generated_tokens)
+        new_labels = generated_tokens.clone()
+
+        # If there's pad_token_id, set attention mask to 0 for padding tokens
+        if pad_token_id is not None:
+            new_labels[new_labels == pad_token_id] = -100
+            new_attention_mask[generated_tokens == pad_token_id] = 0
+
+        return generated_tokens, new_attention_mask, new_labels
+
+    def training_step(
+        self, model: nn.Module, inputs: dict[str, Union[torch.Tensor, Any]], num_items_in_batch: Optional[int] = None
+    ) -> torch.Tensor:
+        """
+        Perform a training step for the Generalized Knowledge Distillation (GKD) model.
+
+        This method implements the on-policy learning approach described in the GKD paper. With probability
+        `self.lmbda`, it generates new responses using the student model, which are then used for training instead of
+        the original inputs.
+        """
+        if self.seq_kd:
+            with unwrap_model_for_generation(self.teacher_model, self.accelerator) as unwrapped_model:
+                new_input_ids, new_attention_mask, new_labels = self.generate_on_policy_outputs(
+                    unwrapped_model, inputs, self.generation_config, self.processing_class.pad_token_id
+                )
+            inputs["input_ids"] = new_input_ids
+            inputs["attention_mask"] = new_attention_mask
+            inputs["labels"] = new_labels
+        if random.random() <= self.lmbda:
+            with unwrap_model_for_generation(model, self.accelerator) as unwrapped_model:
+                new_input_ids, new_attention_mask, new_labels = self.generate_on_policy_outputs(
+                    unwrapped_model, inputs, self.generation_config, self.processing_class.pad_token_id
+                )
+            inputs["input_ids"] = new_input_ids
+            inputs["attention_mask"] = new_attention_mask
+            inputs["labels"] = new_labels
+
+        loss = super().training_step(model, inputs, num_items_in_batch)
+        return loss
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        citation = textwrap.dedent("""\
+        @inproceedings{agarwal2024on-policy,
+            title        = {{On-Policy Distillation of Language Models: Learning from Self-Generated Mistakes}},
+            author       = {Rishabh Agarwal and Nino Vieillard and Yongchao Zhou and Piotr Stanczyk and Sabela Ramos Garea and Matthieu Geist and Olivier Bachem},
+            year         = 2024,
+            booktitle    = {The Twelfth International Conference on Learning Representations, {ICLR} 2024, Vienna, Austria, May 7-11, 2024},
+            publisher    = {OpenReview.net},
+            url          = {https://openreview.net/forum?id=3zKtaqxLhW},
+        }""")
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="GKD",
+            trainer_citation=citation,
+            paper_title="On-Policy Distillation of Language Models: Learning from Self-Generated Mistakes",
+            paper_id="2306.13649",
+        )
+
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothGKDTrainer(_UnslothGKDTrainer):
+    """
+    
+    """
+    def __init__(
+        self,
+        model = None,
+        teacher_model = None,
+        args = None,
+        data_collator = None,
+        train_dataset = None,
+        eval_dataset = None,
+        processing_class = None,
+        compute_metrics = None,
+        callbacks = None,
+        preprocess_logits_for_metrics = None,
+        peft_config = None,
+        formatting_func = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothGKDConfig()
+        use_bf16 = getattr(args, 'bf16', False)
+        if type(use_bf16) is not bool: use_bf16 = False
+        use_fp16 = getattr(args, 'fp16', False)
+        if type(use_fp16) is not bool: use_fp16 = False
+        force_float32 = False
+        if os.environ.get('UNSLOTH_FORCE_FLOAT32', '0') == '1':
+            print('Unsloth: Switching to float32 training since model cannot work with float16')
+            force_float32 = True
+        mixed_precision_dtype = os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32')
+        dtype = getattr(model.config, 'torch_dtype', None)
+        if dtype is None: dtype = model.get_input_embeddings().dtype
+        from unsloth_zoo.utils import _get_dtype
+        dtype = _get_dtype(dtype)
+        float16 = dtype == torch.float16
+        if not force_float32 and (float16 and use_bf16): raise TypeError('Unsloth: Model is in float16 precision but you want to use bfloat16 precision. Set fp16 to `True` and bf16 to `False`')
+        if not force_float32 and (not float16 and use_fp16): raise TypeError('Unsloth: Model is in bfloat16 precision but you want to use float16 precision. Set fp16 to `False` and bf16 to `True`')
+        if force_float32:
+            args.fp16 = False
+            args.bf16 = False
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'no'
+        elif (not use_bf16 and not use_fp16) and mixed_precision_dtype == 'float32':
+            args.fp16 = float16
+            args.bf16 = not float16
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'fp16' if float16 else 'bf16'
+        if getattr(args, 'eval_dataset', None) is not None and getattr(args, 'eval_strategy', 'no') == 'no':
+            args.eval_strategy = 'steps'
+            if getattr(args, 'eval_steps', None) is None: args.eval_steps = 0.1
+        ga_steps = getattr(args, 'gradient_accumulation_steps', None)
+        if ga_steps is not None and ga_steps > 1:
+            from transformers import __version__ as transformers_version
+            if Version(transformers_version) <= Version('4.45.2'):
+                print('**** Unsloth: Please use our fixed gradient_accumulation_steps by updating transformers, TRL and Unsloth!\n'
+                      '`pip install --upgrade --no-cache-dir --force-reinstall --no-deps unsloth transformers trl unsloth_zoo`')
+        if getattr(args, 'eval_strategy', 'no') != 'no':
+            eval_bsz = getattr(args, 'per_device_eval_batch_size', 8)
+            if eval_bsz == 8 and args.per_device_train_batch_size < eval_bsz: args.per_device_eval_batch_size = args.per_device_train_batch_size
+            if getattr(args, 'eval_accumulation_steps', None) is None and ga_steps is not None: args.eval_accumulation_steps = ga_steps
+        fp16_full_eval = getattr(args, 'fp16_full_eval', False)
+        if type(fp16_full_eval) is not bool: fp16_full_eval = False
+        bf16_full_eval = getattr(args, 'bf16_full_eval', False)
+        if type(bf16_full_eval) is not bool: bf16_full_eval = False
+        if args.fp16 and bf16_full_eval: args.bf16_full_eval = False; args.fp16_full_eval = True
+        if args.bf16 and fp16_full_eval: args.bf16_full_eval = True; args.fp16_full_eval = False
+        if force_float32:
+            args.bf16_full_eval = False
+            args.fp16_full_eval = False
+        elif os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32') == 'bfloat16':
+            args.bf16_full_eval = True
+            args.fp16_full_eval = False
+        elif not bf16_full_eval and not fp16_full_eval:
+            args.bf16_full_eval = args.bf16
+            args.fp16_full_eval = args.fp16
+        _output_logits = False
+        if locals().get('compute_metrics', None) is not None: _output_logits = True
+        if locals().get('preprocess_logits_for_metrics', None) is not None: _output_logits = True
+        if _output_logits:
+            os.environ['UNSLOTH_RETURN_LOGITS'] = '1'
+        if 'max_seq_length' not in locals() and not hasattr(args, 'max_seq_length'):
+            pass
+        else:
+            model_max_seq_length = getattr(model, 'max_seq_length', None)
+            args_max_seq_length  = getattr(args,  'max_seq_length', None)
+            if args_max_seq_length is None and model_max_seq_length is not None:
+                max_seq_length = model.max_seq_length
+                if hasattr(args, 'max_seq_length'): args.max_seq_length = max_seq_length
+        if model is not None and hasattr(model, 'for_training'):
+            model.for_training()
+        if 'tokenizer' in locals() and hasattr(tokenizer, 'padding_side'): tokenizer.padding_side = 'right'
+        if 'processing_class' in locals():
+            if hasattr(processing_class, 'padding_side'): processing_class.padding_side = 'right'
+            if hasattr(processing_class, 'tokenizer') and hasattr(processing_class.tokenizer, 'padding_side'): processing_class.tokenizer.padding_side = 'right'
+        __tokenizer = processing_class if 'processing_class' in locals() else tokenizer
+        from unsloth_zoo.vision_utils import UnslothVisionDataCollator
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if isinstance(data_collator, DataCollatorForSeq2Seq) and 'labels' not in train_dataset.column_names:
+                data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False, mlm_probability = 0.0)
+            elif isinstance(data_collator, TransformersDataCollatorForLanguageModeling) and 'labels' in train_dataset.column_names:
+                data_collator = DataCollatorForSeq2Seq(__tokenizer)
+        else:
+            if hasattr(args, 'remove_unused_columns'): args.remove_unused_columns = False
+            if hasattr(args, 'dataset_text_field'): args.dataset_text_field = ''
+            if hasattr(args, 'dataset_kwargs'): args.dataset_kwargs = {'skip_prepare_dataset': True}
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if not hasattr(__tokenizer, 'pad') and hasattr(__tokenizer, 'tokenizer'):
+                if isinstance(data_collator, DataCollatorForSeq2Seq):
+                    data_collator = DataCollatorForSeq2Seq(__tokenizer.tokenizer)
+                else:
+                    data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False, mlm_probability = 0.0)
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('gkd_trainer', other_metrics)
+        
+        super().__init__(
+            model = model,
+            teacher_model = teacher_model,
+            args = args,
+            data_collator = data_collator,
+            train_dataset = train_dataset,
+            eval_dataset = eval_dataset,
+            processing_class = processing_class,
+            compute_metrics = compute_metrics,
+            callbacks = callbacks,
+            preprocess_logits_for_metrics = preprocess_logits_for_metrics,
+            peft_config = peft_config,
+            formatting_func = formatting_func,**kwargs)
+        if hasattr(self, 'neftune_hook_handle'):
+            self.neftune_hook_handle.remove()
+            if hasattr(self, 'neftune_hook_handle'): del self.neftune_hook_handle
+        if getattr(args, 'neftune_noise_alpha', None) is not None:
+            model.get_input_embeddings().neftune_noise_alpha = self.neftune_noise_alpha
+        pass
+        if hasattr(self, 'accelerator'):
+            scaler = self.accelerator.scaler
+            current_model = model
+            while hasattr(current_model, 'model'):
+                current_model.accelerator_scaler = scaler
+                current_model = current_model.model
+            current_model.accelerator_scaler = scaler
+        pass
+        
+pass

unsloth_compiled_cache/UnslothIterativeSFTTrainer.py

@@ -0,0 +1,924 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.iterative_sft_trainer import (AutoModelForCausalLM, AutoTokenizer, BaseImageProcessor, Callable, DataCollator, DataCollatorForLanguageModeling, DataCollatorForSeq2Seq, DataLoader, Dataset, EvalLoopOutput, FeatureExtractionMixin, IterativeSFTConfig, IterativeSFTTrainer, Optional, PPODecorators, Path, PeftModel, PreTrainedModel, PreTrainedTokenizerBase, ProcessorMixin, Trainer, TrainingArguments, Union, generate_model_card, get_comet_experiment_url, is_peft_available, is_wandb_available, os, torch, wandb, warnings, Optional, PeftModel, PreTrainedModel, Trainer, is_peft_available, os, torch)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothIterativeSFTConfig(IterativeSFTConfig):
+    """
+    
+    Configuration class for the [`IterativeSFTTrainer`].
+
+    This class includes only the parameters that are specific to Iterative SFT training. For a full list of training
+    arguments, please refer to the [`~transformers.TrainingArguments`] documentation. Note that default values in this
+    class may differ from those in [`~transformers.TrainingArguments`].
+
+    Using [`~transformers.HfArgumentParser`] we can turn this class into
+    [argparse](https://docs.python.org/3/library/argparse#module-argparse) arguments that can be specified on the
+    command line.
+
+    Parameters:
+        > Parameters that control the model
+
+        model_init_kwargs (`dict[str, Any]` or `None`, *optional*, defaults to `None`):
+            Keyword arguments for [`~transformers.AutoModelForCausalLM.from_pretrained`], used when the `model`
+            argument of the [`IterativeSFTTrainer`] is provided as a string.
+
+        > Parameters that control the data preprocessing
+
+        max_length (`int` or `None`, *optional*, defaults to `None`):
+            Maximum length of the tokenized sequence. Sequences longer than `max_length` are truncated.
+        truncation_mode (`str`, *optional*, defaults to `"keep_end"`):
+            The truncation mode to use, either `"keep_end"` or `"keep_start"`.
+        optimize_device_cache (`bool`, *optional*, defaults to `False`):
+            Whether to optimize accelerator cache for slightly more memory-efficient training.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    max_seq_length : Optional[int] = field(
+        default = None,
+        metadata = {'help': 'Maximum sequence length to truncate to.'},
+    )
+    def __init__(
+        self,
+        output_dir = None,
+        overwrite_output_dir = None,
+        do_train = False,
+        do_eval = False,
+        do_predict = False,
+        eval_strategy = 'no',
+        prediction_loss_only = False,
+        per_device_train_batch_size = 4,
+        per_device_eval_batch_size = 4,
+        per_gpu_train_batch_size = None,
+        per_gpu_eval_batch_size = None,
+        gradient_accumulation_steps = 2,
+        eval_accumulation_steps = 2,
+        eval_delay = 0,
+        torch_empty_cache_steps = 250,
+        learning_rate = 5e-05,
+        weight_decay = 0.01,
+        adam_beta1 = 0.9,
+        adam_beta2 = 0.999,
+        adam_epsilon = 1e-08,
+        max_grad_norm = 1.0,
+        num_train_epochs = 3.0,
+        max_steps = -1,
+        lr_scheduler_type = 'linear',
+        warmup_ratio = 0.1,
+        warmup_steps = 0,
+        log_level = 'passive',
+        log_level_replica = 'warning',
+        log_on_each_node = True,
+        logging_dir = None,
+        logging_strategy = 'steps',
+        logging_first_step = False,
+        logging_steps = 1,
+        logging_nan_inf_filter = False,
+        save_strategy = 'steps',
+        save_steps = 500,
+        save_total_limit = None,
+        save_safetensors = True,
+        save_on_each_node = False,
+        save_only_model = False,
+        restore_callback_states_from_checkpoint = False,
+        no_cuda = False,
+        use_cpu = False,
+        use_mps_device = False,
+        seed = 3407,
+        data_seed = 3407,
+        jit_mode_eval = False,
+        use_ipex = False,
+        bf16 = False,
+        fp16 = False,
+        fp16_opt_level = 'O1',
+        half_precision_backend = 'auto',
+        bf16_full_eval = False,
+        fp16_full_eval = False,
+        tf32 = None,
+        local_rank = -1,
+        ddp_backend = None,
+        tpu_num_cores = None,
+        tpu_metrics_debug = False,
+        debug = '',
+        dataloader_drop_last = False,
+        eval_steps = None,
+        dataloader_num_workers = 0,
+        dataloader_prefetch_factor = None,
+        past_index = -1,
+        run_name = None,
+        disable_tqdm = None,
+        remove_unused_columns = True,
+        label_names = None,
+        load_best_model_at_end = False,
+        metric_for_best_model = None,
+        greater_is_better = None,
+        ignore_data_skip = False,
+        fsdp = '',
+        fsdp_min_num_params = 0,
+        fsdp_config = None,
+        fsdp_transformer_layer_cls_to_wrap = None,
+        accelerator_config = None,
+        deepspeed = None,
+        label_smoothing_factor = 0.0,
+        optim = 'adamw_8bit',
+        optim_args = None,
+        adafactor = False,
+        group_by_length = False,
+        length_column_name = 'length',
+        report_to = None,
+        ddp_find_unused_parameters = None,
+        ddp_bucket_cap_mb = None,
+        ddp_broadcast_buffers = None,
+        dataloader_pin_memory = True,
+        dataloader_persistent_workers = False,
+        skip_memory_metrics = True,
+        use_legacy_prediction_loop = False,
+        push_to_hub = False,
+        resume_from_checkpoint = None,
+        hub_model_id = None,
+        hub_strategy = 'every_save',
+        hub_token = None,
+        hub_private_repo = None,
+        hub_always_push = False,
+        hub_revision = None,
+        gradient_checkpointing = False,
+        gradient_checkpointing_kwargs = None,
+        include_inputs_for_metrics = False,
+        eval_do_concat_batches = True,
+        fp16_backend = 'auto',
+        push_to_hub_model_id = None,
+        push_to_hub_organization = None,
+        push_to_hub_token = None,
+        mp_parameters = '',
+        auto_find_batch_size = True,
+        full_determinism = False,
+        torchdynamo = None,
+        ray_scope = 'last',
+        ddp_timeout = 1800,
+        torch_compile = False,
+        torch_compile_backend = None,
+        torch_compile_mode = None,
+        include_tokens_per_second = False,
+        include_num_input_tokens_seen = False,
+        neftune_noise_alpha = None,
+        optim_target_modules = None,
+        batch_eval_metrics = False,
+        eval_on_start = False,
+        use_liger_kernel = False,
+        liger_kernel_config = None,
+        eval_use_gather_object = False,
+        average_tokens_across_devices = True,
+        model_init_kwargs = None,
+        max_length = None,
+        truncation_mode = 'keep_end',
+        optimize_device_cache = False,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        max_seq_length = None,
+        **kwargs,
+    ):
+        if learning_rate < 1e-7: raise FloatingPointError(f'Unsloth: Your learning rate of `{learning_rate}` is too small and less than 1e-7! Consider increasing it, otherwise gradient updates will be close to 0!')
+        if learning_rate > 1: raise OverflowError(f'Unsloth: Your learning rate of `{learning_rate}` is way too larger > 1! Consider decreasing it to 1e-1, otherwise gradient updates will explode!')
+        if output_dir is None and save_strategy == 'steps' and save_steps == 500:
+            output_dir = 'unsloth_training_checkpoints'
+            save_strategy = 'no'
+        
+        super().__init__(
+            output_dir = output_dir,
+            overwrite_output_dir = overwrite_output_dir,
+            do_train = do_train,
+            do_eval = do_eval,
+            do_predict = do_predict,
+            eval_strategy = eval_strategy,
+            prediction_loss_only = prediction_loss_only,
+            per_device_train_batch_size = per_device_train_batch_size,
+            per_device_eval_batch_size = per_device_eval_batch_size,
+            per_gpu_train_batch_size = per_gpu_train_batch_size,
+            per_gpu_eval_batch_size = per_gpu_eval_batch_size,
+            gradient_accumulation_steps = gradient_accumulation_steps,
+            eval_accumulation_steps = eval_accumulation_steps,
+            eval_delay = eval_delay,
+            torch_empty_cache_steps = torch_empty_cache_steps,
+            learning_rate = learning_rate,
+            weight_decay = weight_decay,
+            adam_beta1 = adam_beta1,
+            adam_beta2 = adam_beta2,
+            adam_epsilon = adam_epsilon,
+            max_grad_norm = max_grad_norm,
+            num_train_epochs = num_train_epochs,
+            max_steps = max_steps,
+            lr_scheduler_type = lr_scheduler_type,
+            warmup_ratio = warmup_ratio,
+            warmup_steps = warmup_steps,
+            log_level = log_level,
+            log_level_replica = log_level_replica,
+            log_on_each_node = log_on_each_node,
+            logging_dir = logging_dir,
+            logging_strategy = logging_strategy,
+            logging_first_step = logging_first_step,
+            logging_steps = logging_steps,
+            logging_nan_inf_filter = logging_nan_inf_filter,
+            save_strategy = save_strategy,
+            save_steps = save_steps,
+            save_total_limit = save_total_limit,
+            save_safetensors = save_safetensors,
+            save_on_each_node = save_on_each_node,
+            save_only_model = save_only_model,
+            restore_callback_states_from_checkpoint = restore_callback_states_from_checkpoint,
+            no_cuda = no_cuda,
+            use_cpu = use_cpu,
+            use_mps_device = use_mps_device,
+            seed = seed,
+            data_seed = data_seed,
+            jit_mode_eval = jit_mode_eval,
+            use_ipex = use_ipex,
+            bf16 = bf16,
+            fp16 = fp16,
+            fp16_opt_level = fp16_opt_level,
+            half_precision_backend = half_precision_backend,
+            bf16_full_eval = bf16_full_eval,
+            fp16_full_eval = fp16_full_eval,
+            tf32 = tf32,
+            local_rank = local_rank,
+            ddp_backend = ddp_backend,
+            tpu_num_cores = tpu_num_cores,
+            tpu_metrics_debug = tpu_metrics_debug,
+            debug = debug,
+            dataloader_drop_last = dataloader_drop_last,
+            eval_steps = eval_steps,
+            dataloader_num_workers = dataloader_num_workers,
+            dataloader_prefetch_factor = dataloader_prefetch_factor,
+            past_index = past_index,
+            run_name = run_name,
+            disable_tqdm = disable_tqdm,
+            remove_unused_columns = remove_unused_columns,
+            label_names = label_names,
+            load_best_model_at_end = load_best_model_at_end,
+            metric_for_best_model = metric_for_best_model,
+            greater_is_better = greater_is_better,
+            ignore_data_skip = ignore_data_skip,
+            fsdp = fsdp,
+            fsdp_min_num_params = fsdp_min_num_params,
+            fsdp_config = fsdp_config,
+            fsdp_transformer_layer_cls_to_wrap = fsdp_transformer_layer_cls_to_wrap,
+            accelerator_config = accelerator_config,
+            deepspeed = deepspeed,
+            label_smoothing_factor = label_smoothing_factor,
+            optim = optim,
+            optim_args = optim_args,
+            adafactor = adafactor,
+            group_by_length = group_by_length,
+            length_column_name = length_column_name,
+            report_to = report_to,
+            ddp_find_unused_parameters = ddp_find_unused_parameters,
+            ddp_bucket_cap_mb = ddp_bucket_cap_mb,
+            ddp_broadcast_buffers = ddp_broadcast_buffers,
+            dataloader_pin_memory = dataloader_pin_memory,
+            dataloader_persistent_workers = dataloader_persistent_workers,
+            skip_memory_metrics = skip_memory_metrics,
+            use_legacy_prediction_loop = use_legacy_prediction_loop,
+            push_to_hub = push_to_hub,
+            resume_from_checkpoint = resume_from_checkpoint,
+            hub_model_id = hub_model_id,
+            hub_strategy = hub_strategy,
+            hub_token = hub_token,
+            hub_private_repo = hub_private_repo,
+            hub_always_push = hub_always_push,
+            hub_revision = hub_revision,
+            gradient_checkpointing = gradient_checkpointing,
+            gradient_checkpointing_kwargs = gradient_checkpointing_kwargs,
+            include_inputs_for_metrics = include_inputs_for_metrics,
+            eval_do_concat_batches = eval_do_concat_batches,
+            fp16_backend = fp16_backend,
+            push_to_hub_model_id = push_to_hub_model_id,
+            push_to_hub_organization = push_to_hub_organization,
+            push_to_hub_token = push_to_hub_token,
+            mp_parameters = mp_parameters,
+            auto_find_batch_size = auto_find_batch_size,
+            full_determinism = full_determinism,
+            torchdynamo = torchdynamo,
+            ray_scope = ray_scope,
+            ddp_timeout = ddp_timeout,
+            torch_compile = torch_compile,
+            torch_compile_backend = torch_compile_backend,
+            torch_compile_mode = torch_compile_mode,
+            include_tokens_per_second = include_tokens_per_second,
+            include_num_input_tokens_seen = include_num_input_tokens_seen,
+            neftune_noise_alpha = neftune_noise_alpha,
+            optim_target_modules = optim_target_modules,
+            batch_eval_metrics = batch_eval_metrics,
+            eval_on_start = eval_on_start,
+            use_liger_kernel = use_liger_kernel,
+            liger_kernel_config = liger_kernel_config,
+            eval_use_gather_object = eval_use_gather_object,
+            average_tokens_across_devices = average_tokens_across_devices,
+            model_init_kwargs = model_init_kwargs,
+            max_length = max_length,
+            truncation_mode = truncation_mode,
+            optimize_device_cache = optimize_device_cache,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        self.max_seq_length = max_seq_length
+pass
+
+class _UnslothIterativeSFTTrainer(Trainer):
+    """"""
+
+    _tag_names = ["trl", "iterative-sft"]
+
+    def __init__(
+        self,
+        model: Union[str, PreTrainedModel],
+        args: Optional[Union[IterativeSFTConfig, TrainingArguments]] = None,
+        data_collator: Optional[DataCollator] = None,
+        eval_dataset: Optional[Union[Dataset, dict[str, Dataset]]] = None,
+        processing_class: Optional[
+            Union[PreTrainedTokenizerBase, BaseImageProcessor, FeatureExtractionMixin, ProcessorMixin]
+        ] = None,
+        optimizers: tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR] = (
+            None,
+            None,
+        ),
+        preprocess_logits_for_metrics: Optional[Callable[[torch.Tensor, torch.Tensor], torch.Tensor]] = None,
+        compute_metrics: Optional[Callable[[EvalLoopOutput], dict]] = None,
+    ):
+        # Args
+        model_id = model if isinstance(model, str) else model.config._name_or_path
+        if args is None:
+            model_name = model_id.split("/")[-1]
+            args = IterativeSFTConfig(f"{model_name}-IterativeSFT")
+        elif isinstance(args, TrainingArguments) and not isinstance(args, IterativeSFTConfig):
+            dict_args = args.to_dict()
+            dict_args["hub_token"] = args.hub_token  # to_dict hides the hub_token
+            dict_args.pop("push_to_hub_token")
+            args = IterativeSFTConfig(**dict_args)
+
+        # Handle the tokenizer
+        if processing_class is None:
+            processing_class = AutoTokenizer.from_pretrained(model_id)
+
+        # Model
+        if args.model_init_kwargs is not None and not isinstance(model, str):
+            warnings.warn(
+                "You passed model_init_kwargs to the `IterativeSFTConfig`, but your model is already instantiated. "
+                "The `model_init_kwargs` will be ignored."
+            )
+        if isinstance(model, str):
+            model = self._create_model_from_path(model, args)
+
+        # PEFT configuration and model wrapping
+        if is_peft_available() and isinstance(model, PeftModel):
+            self.is_peft_model = True
+        else:
+            self.is_peft_model = False
+
+        self.processing_class = processing_class
+        self.is_encoder_decoder = getattr(model.config, "is_encoder_decoder", False)
+
+        if data_collator is None:
+            if self.is_encoder_decoder:
+                self.data_collator = DataCollatorForSeq2Seq(
+                    processing_class, label_pad_token_id=-100, pad_to_multiple_of=8
+                )
+            else:
+                self.data_collator = DataCollatorForLanguageModeling(self.processing_class, mlm=False)
+        else:
+            self.data_collator = data_collator
+
+        self.max_length = args.max_length
+        self.truncation_mode = args.truncation_mode
+        self.optimize_device_cache = args.optimize_device_cache
+
+        super().__init__(
+            model=model,
+            args=args,
+            data_collator=self.data_collator,
+            eval_dataset=eval_dataset,
+            processing_class=processing_class,
+            compute_metrics=compute_metrics,
+            optimizers=optimizers,
+            preprocess_logits_for_metrics=preprocess_logits_for_metrics,
+        )
+
+        # Add tags for models that have been loaded with the correct transformers version
+        if hasattr(self.model, "add_model_tags"):
+            self.model.add_model_tags(self._tag_names)
+
+        self.create_optimizer_and_scheduler(self.args.max_steps)
+
+        # prepare model, optimizer and lr_scheduler
+        self.model, self.optimizer, self.lr_scheduler = self.accelerator.prepare(
+            self.model, self.optimizer, self.lr_scheduler
+        )
+
+        self.processing_class.truncation_side = "left" if self.truncation_mode == "keep_end" else "right"
+
+        if not hasattr(self, "accelerator"):
+            raise AttributeError(
+                "Your `Trainer` does not have an `accelerator` object. Consider upgrading `transformers`."
+            )
+
+        PPODecorators.optimize_device_cache = self.optimize_device_cache
+
+    def _create_model_from_path(self, model_path: str, args: IterativeSFTConfig) -> PreTrainedModel:
+        """Creates a model from a path or model identifier."""
+        model_init_kwargs = args.model_init_kwargs or {}
+        return AutoModelForCausalLM.from_pretrained(model_path, **model_init_kwargs)
+
+    def prepare_model_inputs(self, input_ids: torch.Tensor, attention_mask: torch.Tensor, labels: torch.Tensor):
+        if attention_mask is None:
+            attention_mask = [torch.ones_like(ids) for ids in input_ids]
+
+        if self.is_encoder_decoder:
+            input_data = self.data_collator(
+                [
+                    {"input_ids": ids, "attention_mask": att, "labels": lab}
+                    for ids, att, lab in zip(input_ids, attention_mask, labels)
+                ]
+            ).to(self.model.device)
+
+            input_data.pop("decoder_input_ids", None)  # This is directly computed inside the model
+
+            input_data["labels"][input_data["labels"] == self.processing_class.pad_token_id] = -100
+
+        else:
+            input_data = self.data_collator(
+                [{"input_ids": ids, "attention_mask": att} for ids, att in zip(input_ids, attention_mask)]
+            ).to(self.model.device)
+
+        # truncate in case the user has provided input_ids, attention_mask and labels
+        if self.max_length is not None:
+            if self.truncation_mode == "keep_start":
+                input_data = {k: v[: self.max_length] for k, v in input_data.items()}
+            elif self.truncation_mode == "keep_end":
+                input_data = {k: v[-self.max_length :] for k, v in input_data.items()}
+            else:
+                raise ValueError(f"Unknown truncation mode: {self.truncation_mode}")
+
+        return input_data
+
+    @staticmethod
+    def _step_safety_checker(
+        input_ids: list[torch.LongTensor],
+        attention_mask: list[torch.LongTensor],
+        labels: list[torch.LongTensor],
+        texts: list[str],
+        texts_labels: list[str],
+    ):
+        """
+        Check if the input data is valid for training.
+
+        Args:
+            input_ids (list[`torch.LongTensor`]):
+                List of tensors containing the input_ids
+            attention_mask (list[`torch.LongTensor`]):
+                List of tensors containing the attention_mask
+            labels (list[`torch.FloatTensor`]):
+                List of tensors containing the labels
+            texts (list[`str`]):
+                List of string containing the text input.
+            texts_labels (list[`str`]):
+                List of string containing the text labels.
+
+        Returns:
+            `tuple`: The input data.
+        """
+        if texts is None:
+            if attention_mask is None:
+                for name, tensor_list in zip(["input_ids", "labels"], [input_ids, labels]):
+                    if not isinstance(tensor_list, list):
+                        raise ValueError(f"{name} must be a list of tensors - got {type(tensor_list)}")
+                    if not isinstance(tensor_list[0], torch.Tensor):
+                        raise ValueError(f"Elements in {name} must be tensors - got {type(tensor_list[0])}")
+            else:
+                for name, tensor_list in zip(
+                    ["input_ids", "attention_mask", "labels"], [input_ids, attention_mask, labels]
+                ):
+                    if not isinstance(tensor_list, list):
+                        raise ValueError(f"{name} must be a list of tensors - got {type(tensor_list)}")
+                    if not isinstance(tensor_list[0], torch.Tensor):
+                        raise ValueError(f"Elements in {name} must be tensors - got {type(tensor_list[0])}")
+        else:
+            if not isinstance(texts, list):
+                raise ValueError(f"'text' must be a list of strings - got {type(texts)}")
+            if not isinstance(texts[0], str):
+                raise ValueError(f"Elements in 'text' must be strings - got {type(texts[0])}")
+            if texts_labels is not None:
+                if not isinstance(texts_labels, list):
+                    raise ValueError(f"'text_labels' must be a list of strings - got {type(texts_labels)}")
+                if not isinstance(texts_labels[0], str):
+                    raise ValueError(f"Elements in 'text_labels' must be strings - got {type(texts_labels[0])}")
+
+        return input_ids, attention_mask, labels, texts, texts_labels
+
+    @PPODecorators.empty_device_cache()
+    def step(
+        self,
+        input_ids: Optional[list[torch.LongTensor]] = None,
+        attention_mask: Optional[list[torch.LongTensor]] = None,
+        labels: Optional[list[torch.LongTensor]] = None,
+        texts: Optional[list[str]] = None,
+        texts_labels: Optional[list[str]] = None,
+    ):
+        """
+        Run an optimisation step given a list of input_ids, attention_mask, and labels or a list of text and
+        text_labels.
+
+        Args:
+            input_ids (list[`torch.LongTensor`]):
+                List of tensors containing the input_ids (if not provided, text will be used)
+            attention_mask (list[`torch.LongTensor`], , *optional*):
+                List of tensors containing the attention_mask
+            labels (list[`torch.FloatTensor`], *optional*):
+                List of tensors containing the labels (if set to None, will default to input_ids)
+            texts (list[`str`], *optional*):
+                List of strings containing the text input (if not provided, input_ids will directly be used)
+            texts_labels (list[`str`], *optional*):
+                List of strings containing the text labels (if set to None, will default to text)
+
+        Returns:
+            `dict[str, Any]`: A summary of the training statistics
+        """
+        self.model.train()
+
+        if self.state.global_step == 0:
+            self.tr_loss = torch.tensor(0.0).to(self.args.device)
+            self._globalstep_last_logged = self.state.global_step
+
+        if input_ids is None and texts is None:
+            raise ValueError("Step should include `input_ids` or `texts` as keyword arguments.")
+        elif input_ids is not None and texts is not None:
+            warnings.warn(
+                "Both `input_ids` and `texts` argument are provided. `input_ids` will be ignored. "
+                "Please provide only one of the two.",
+                UserWarning,
+            )
+
+        if labels is None and texts_labels is None and self.is_encoder_decoder:
+            raise ValueError(
+                "No 'labels' or 'text_labels' are provided. When using an encoder-decoder architecture, 'labels' or 'text_labels' must be passed."
+            )
+
+        # Convert Column to list if not already
+        input_ids = input_ids[:] if input_ids is not None else None
+        attention_mask = attention_mask[:] if attention_mask is not None else None
+        labels = labels[:] if labels is not None else None
+        texts = texts[:] if texts is not None else None
+        texts_labels = texts_labels[:] if texts_labels is not None else None
+
+        input_ids, attention_mask, labels, texts, texts_labels = self._step_safety_checker(
+            input_ids, attention_mask, labels, texts, texts_labels
+        )
+
+        if texts is not None:
+            model_inputs = self.processing_class(
+                texts, max_length=self.max_length, truncation=True, padding=True, return_tensors="pt"
+            )
+
+            input_ids, attention_mask = model_inputs["input_ids"], model_inputs["attention_mask"]
+
+        if texts_labels is not None:
+            labels = self.processing_class(
+                texts, max_length=self.max_length, truncation=True, padding=True, return_tensors="pt"
+            )["input_ids"]
+
+        if labels is None:
+            labels = input_ids
+
+        model_inputs = self.prepare_model_inputs(input_ids, attention_mask, labels)
+
+        model_inputs_names = list(model_inputs.keys())
+
+        batch_dict = {}
+        batch_dict.update(model_inputs)
+
+        def collator(data):
+            return_dict = dict()
+            for key in data[0]:
+                if key in ["input_ids", "attention_mask", "labels"]:
+                    return_dict[key] = torch.stack([d[key] for d in data]).to(self.model.device)
+            return return_dict
+
+        batch_data = Dataset.from_dict(batch_dict)
+        batch_data.set_format("torch")
+
+        step_dataloader = DataLoader(
+            batch_data,
+            batch_size=self.args.per_device_train_batch_size,
+            shuffle=True,
+            collate_fn=collator,
+        )
+
+        for _, batch in enumerate(step_dataloader):
+            with self.accelerator.accumulate(self.model):
+                model_inputs = {k: batch[k] for k in model_inputs_names}
+                loss = self.compute_loss(self.model, model_inputs)
+
+                if self.args.n_gpu > 1:
+                    loss = loss.mean()
+
+                tr_loss_step = loss.detach()
+
+                self.accelerator.backward(loss)
+
+                if self.accelerator.sync_gradients and self.args.max_grad_norm is not None:
+                    self.accelerator.clip_grad_norm_(
+                        self.model.parameters(),
+                        self.args.max_grad_norm,
+                    )
+
+                self.optimizer.step()
+                self.optimizer.zero_grad()
+                if self.lr_scheduler is not None:
+                    self.lr_scheduler.step()
+
+                self.state.global_step += 1
+
+                # update stats etc
+                self.tr_loss += tr_loss_step
+
+                self._maybe_log_save_evaluate()
+
+    def _maybe_log_save_evaluate(self):
+        # check if eval is required
+        if self.args.eval_steps is not None:
+            if self.state.global_step % self.args.eval_steps == 0 and self.state.global_step != 0:
+                self.evaluate(self.eval_dataset)
+
+        # check if logging is required
+        if self.args.logging_steps is not None:
+            if self.state.global_step % self.args.logging_steps == 0 and self.state.global_step != 0:
+                logs: dict[str, float] = {}
+
+                tr_loss_scalar = self._nested_gather(self.tr_loss).mean().item()
+
+                # reset tr_loss to zero
+                self.tr_loss -= self.tr_loss
+
+                logs["loss"] = round(tr_loss_scalar / (self.state.global_step - self._globalstep_last_logged), 4)
+                logs["learning_rate"] = self._get_learning_rate()
+
+                self._globalstep_last_logged = self.state.global_step
+
+                self.log(logs)
+
+    # Ensure the model card is saved along with the checkpoint
+    def _save_checkpoint(self, model, trial):
+        if self.args.hub_model_id is None:
+            model_name = Path(self.args.output_dir).name
+        else:
+            model_name = self.args.hub_model_id.split("/")[-1]
+        self.create_model_card(model_name=model_name)
+        super()._save_checkpoint(model, trial)
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="Iterative SFT",
+        )
+
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothIterativeSFTTrainer(_UnslothIterativeSFTTrainer):
+    """
+    
+    The IterativeSFTTrainer can be used to finetune models with methods that requires some steps between optimization.
+
+    Args:
+        model (`Union[str, PreTrainedModel]`):
+            Model to be trained. Can be either:
+
+            - A string, being the *model id* of a pretrained model hosted inside a model repo on huggingface.co, or a
+              path to a *directory* containing model weights saved using
+              [`~transformers.PreTrainedModel.save_pretrained`], e.g., `'./my_model_directory/'`. The model is loaded
+              using [`~transformers.AutoModelForCausalLM.from_pretrained`] with the keyword arguments in
+              `args.model_init_kwargs`.
+            - A [`~transformers.PreTrainedModel`] object. Only causal language models are supported.
+        args ([`IterativeSFTConfig`], *optional*, defaults to `None`):
+            Configuration for this trainer. If `None`, a default configuration is used.
+        data_collator (`DataCollator`, *optional*):
+            Function to use to form a batch from a list of elements of the processed `train_dataset` or `eval_dataset`.
+            Will default to [`~transformers.default_data_collator`] if no `processing_class` is provided, an instance
+            of [`~transformers.DataCollatorWithPadding`] otherwise if the processing_class is a feature extractor or
+            tokenizer.
+        eval_dataset (`datasets.Dataset`):
+            The dataset to use for evaluation.
+        processing_class ([`~transformers.PreTrainedTokenizerBase`], [`~transformers.BaseImageProcessor`], [`~transformers.FeatureExtractionMixin`] or [`~transformers.ProcessorMixin`], *optional*, defaults to `None`):
+            Processing class used to process the data. If `None`, the processing class is loaded from the model's name
+            with [`~transformers.AutoTokenizer.from_pretrained`].
+        optimizers (`tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR]`):
+            The optimizer and scheduler to use for training.
+        preprocess_logits_for_metrics (`Callable[[torch.Tensor, torch.Tensor], torch.Tensor]`):
+            The function to use to preprocess the logits before computing the metrics.
+        compute_metrics (`Callable[[EvalPrediction], dict]`, *optional*):
+            The function to use to compute the metrics. Must take a `EvalPrediction` and return a dictionary string to
+            metric values.
+    
+    """
+    def __init__(
+        self,
+        model,
+        args = None,
+        data_collator = None,
+        eval_dataset = None,
+        processing_class = None,
+        preprocess_logits_for_metrics = None,
+        compute_metrics = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothIterativeSFTConfig()
+        use_bf16 = getattr(args, 'bf16', False)
+        if type(use_bf16) is not bool: use_bf16 = False
+        use_fp16 = getattr(args, 'fp16', False)
+        if type(use_fp16) is not bool: use_fp16 = False
+        force_float32 = False
+        if os.environ.get('UNSLOTH_FORCE_FLOAT32', '0') == '1':
+            print('Unsloth: Switching to float32 training since model cannot work with float16')
+            force_float32 = True
+        mixed_precision_dtype = os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32')
+        dtype = getattr(model.config, 'torch_dtype', None)
+        if dtype is None: dtype = model.get_input_embeddings().dtype
+        from unsloth_zoo.utils import _get_dtype
+        dtype = _get_dtype(dtype)
+        float16 = dtype == torch.float16
+        if not force_float32 and (float16 and use_bf16): raise TypeError('Unsloth: Model is in float16 precision but you want to use bfloat16 precision. Set fp16 to `True` and bf16 to `False`')
+        if not force_float32 and (not float16 and use_fp16): raise TypeError('Unsloth: Model is in bfloat16 precision but you want to use float16 precision. Set fp16 to `False` and bf16 to `True`')
+        if force_float32:
+            args.fp16 = False
+            args.bf16 = False
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'no'
+        elif (not use_bf16 and not use_fp16) and mixed_precision_dtype == 'float32':
+            args.fp16 = float16
+            args.bf16 = not float16
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'fp16' if float16 else 'bf16'
+        if getattr(args, 'eval_dataset', None) is not None and getattr(args, 'eval_strategy', 'no') == 'no':
+            args.eval_strategy = 'steps'
+            if getattr(args, 'eval_steps', None) is None: args.eval_steps = 0.1
+        ga_steps = getattr(args, 'gradient_accumulation_steps', None)
+        if ga_steps is not None and ga_steps > 1:
+            from transformers import __version__ as transformers_version
+            if Version(transformers_version) <= Version('4.45.2'):
+                print('**** Unsloth: Please use our fixed gradient_accumulation_steps by updating transformers, TRL and Unsloth!\n'
+                      '`pip install --upgrade --no-cache-dir --force-reinstall --no-deps unsloth transformers trl unsloth_zoo`')
+        if getattr(args, 'eval_strategy', 'no') != 'no':
+            eval_bsz = getattr(args, 'per_device_eval_batch_size', 8)
+            if eval_bsz == 8 and args.per_device_train_batch_size < eval_bsz: args.per_device_eval_batch_size = args.per_device_train_batch_size
+            if getattr(args, 'eval_accumulation_steps', None) is None and ga_steps is not None: args.eval_accumulation_steps = ga_steps
+        fp16_full_eval = getattr(args, 'fp16_full_eval', False)
+        if type(fp16_full_eval) is not bool: fp16_full_eval = False
+        bf16_full_eval = getattr(args, 'bf16_full_eval', False)
+        if type(bf16_full_eval) is not bool: bf16_full_eval = False
+        if args.fp16 and bf16_full_eval: args.bf16_full_eval = False; args.fp16_full_eval = True
+        if args.bf16 and fp16_full_eval: args.bf16_full_eval = True; args.fp16_full_eval = False
+        if force_float32:
+            args.bf16_full_eval = False
+            args.fp16_full_eval = False
+        elif os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32') == 'bfloat16':
+            args.bf16_full_eval = True
+            args.fp16_full_eval = False
+        elif not bf16_full_eval and not fp16_full_eval:
+            args.bf16_full_eval = args.bf16
+            args.fp16_full_eval = args.fp16
+        _output_logits = False
+        if locals().get('compute_metrics', None) is not None: _output_logits = True
+        if locals().get('preprocess_logits_for_metrics', None) is not None: _output_logits = True
+        if _output_logits:
+            os.environ['UNSLOTH_RETURN_LOGITS'] = '1'
+        if 'max_seq_length' not in locals() and not hasattr(args, 'max_seq_length'):
+            pass
+        else:
+            model_max_seq_length = getattr(model, 'max_seq_length', None)
+            args_max_seq_length  = getattr(args,  'max_seq_length', None)
+            if args_max_seq_length is None and model_max_seq_length is not None:
+                max_seq_length = model.max_seq_length
+                if hasattr(args, 'max_seq_length'): args.max_seq_length = max_seq_length
+        if model is not None and hasattr(model, 'for_training'):
+            model.for_training()
+        if 'tokenizer' in locals() and hasattr(tokenizer, 'padding_side'): tokenizer.padding_side = 'right'
+        if 'processing_class' in locals():
+            if hasattr(processing_class, 'padding_side'): processing_class.padding_side = 'right'
+            if hasattr(processing_class, 'tokenizer') and hasattr(processing_class.tokenizer, 'padding_side'): processing_class.tokenizer.padding_side = 'right'
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('iterative_sft_trainer', other_metrics)
+        
+        super().__init__(
+            model = model,
+            args = args,
+            data_collator = data_collator,
+            eval_dataset = eval_dataset,
+            processing_class = processing_class,
+            preprocess_logits_for_metrics = preprocess_logits_for_metrics,
+            compute_metrics = compute_metrics,**kwargs)
+        if hasattr(self, 'neftune_hook_handle'):
+            self.neftune_hook_handle.remove()
+            if hasattr(self, 'neftune_hook_handle'): del self.neftune_hook_handle
+        if getattr(args, 'neftune_noise_alpha', None) is not None:
+            model.get_input_embeddings().neftune_noise_alpha = self.neftune_noise_alpha
+        pass
+        if hasattr(self, 'accelerator'):
+            scaler = self.accelerator.scaler
+            current_model = model
+            while hasattr(current_model, 'model'):
+                current_model.accelerator_scaler = scaler
+                current_model = current_model.model
+            current_model.accelerator_scaler = scaler
+        pass
+        
+pass

unsloth_compiled_cache/UnslothNashMDTrainer.py

@@ -0,0 +1,1019 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.nash_md_trainer import (Any, BaseImageProcessor, BasePairwiseJudge, Callable, Dataset, EvalPrediction, F, FeatureExtractionMixin, GeometricMixtureWrapper, IterableDataset, NashMDConfig, NashMDTrainer, OnlineDPOTrainer, OptimizerNames, Optional, PeftModel, PreTrainedModel, PreTrainedTokenizerBase, ProcessorMixin, SIMPLE_CHAT_TEMPLATE, TrainerCallback, Union, empty_cache, generate_model_card, get_comet_experiment_url, get_reward, is_conversational, is_peft_available, is_wandb_available, jinja2, maybe_apply_chat_template, nn, os, selective_log_softmax, textwrap, torch, truncate_right, unwrap_model_for_generation, wandb)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothNashMDConfig(NashMDConfig):
+    """
+    
+    Configuration class for the [`NashMDTrainer`].
+
+    Subclass of [`OnlineDPOConfig`] we can use all its arguments and add the following:
+
+    Parameters:
+        mixture_coef (`float` or `list[float]`, *optional*, defaults to `0.5`):
+            Logit mixture coefficient for the model and reference model. If a list of floats is provided then the
+            mixture coefficient is selected for each new epoch and the last coefficient is used for the rest of the
+            epochs.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    max_seq_length : Optional[int] = field(
+        default = None,
+        metadata = {'help': 'Maximum sequence length to truncate to.'},
+    )
+    def __init__(
+        self,
+        output_dir = None,
+        overwrite_output_dir = None,
+        do_train = False,
+        do_eval = False,
+        do_predict = False,
+        eval_strategy = 'no',
+        prediction_loss_only = False,
+        per_device_train_batch_size = 4,
+        per_device_eval_batch_size = 4,
+        per_gpu_train_batch_size = None,
+        per_gpu_eval_batch_size = None,
+        gradient_accumulation_steps = 2,
+        eval_accumulation_steps = 2,
+        eval_delay = 0,
+        torch_empty_cache_steps = 250,
+        learning_rate = 5e-05,
+        weight_decay = 0.01,
+        adam_beta1 = 0.9,
+        adam_beta2 = 0.999,
+        adam_epsilon = 1e-08,
+        max_grad_norm = 1.0,
+        num_train_epochs = 3.0,
+        max_steps = -1,
+        lr_scheduler_type = 'linear',
+        warmup_ratio = 0.1,
+        warmup_steps = 0,
+        log_level = 'passive',
+        log_level_replica = 'warning',
+        log_on_each_node = True,
+        logging_dir = None,
+        logging_strategy = 'steps',
+        logging_first_step = False,
+        logging_steps = 1,
+        logging_nan_inf_filter = False,
+        save_strategy = 'steps',
+        save_steps = 500,
+        save_total_limit = None,
+        save_safetensors = True,
+        save_on_each_node = False,
+        save_only_model = False,
+        restore_callback_states_from_checkpoint = False,
+        no_cuda = False,
+        use_cpu = False,
+        use_mps_device = False,
+        seed = 3407,
+        data_seed = 3407,
+        jit_mode_eval = False,
+        use_ipex = False,
+        bf16 = False,
+        fp16 = False,
+        fp16_opt_level = 'O1',
+        half_precision_backend = 'auto',
+        bf16_full_eval = False,
+        fp16_full_eval = False,
+        tf32 = None,
+        local_rank = -1,
+        ddp_backend = None,
+        tpu_num_cores = None,
+        tpu_metrics_debug = False,
+        debug = '',
+        dataloader_drop_last = False,
+        eval_steps = None,
+        dataloader_num_workers = 0,
+        dataloader_prefetch_factor = None,
+        past_index = -1,
+        run_name = None,
+        disable_tqdm = None,
+        remove_unused_columns = True,
+        label_names = None,
+        load_best_model_at_end = False,
+        metric_for_best_model = None,
+        greater_is_better = None,
+        ignore_data_skip = False,
+        fsdp = '',
+        fsdp_min_num_params = 0,
+        fsdp_config = None,
+        fsdp_transformer_layer_cls_to_wrap = None,
+        accelerator_config = None,
+        deepspeed = None,
+        label_smoothing_factor = 0.0,
+        optim = 'adamw_8bit',
+        optim_args = None,
+        adafactor = False,
+        group_by_length = False,
+        length_column_name = 'length',
+        report_to = None,
+        ddp_find_unused_parameters = None,
+        ddp_bucket_cap_mb = None,
+        ddp_broadcast_buffers = None,
+        dataloader_pin_memory = True,
+        dataloader_persistent_workers = False,
+        skip_memory_metrics = True,
+        use_legacy_prediction_loop = False,
+        push_to_hub = False,
+        resume_from_checkpoint = None,
+        hub_model_id = None,
+        hub_strategy = 'every_save',
+        hub_token = None,
+        hub_private_repo = None,
+        hub_always_push = False,
+        hub_revision = None,
+        gradient_checkpointing = False,
+        gradient_checkpointing_kwargs = None,
+        include_inputs_for_metrics = False,
+        eval_do_concat_batches = True,
+        fp16_backend = 'auto',
+        push_to_hub_model_id = None,
+        push_to_hub_organization = None,
+        push_to_hub_token = None,
+        mp_parameters = '',
+        auto_find_batch_size = True,
+        full_determinism = False,
+        torchdynamo = None,
+        ray_scope = 'last',
+        ddp_timeout = 1800,
+        torch_compile = False,
+        torch_compile_backend = None,
+        torch_compile_mode = None,
+        include_tokens_per_second = False,
+        include_num_input_tokens_seen = False,
+        neftune_noise_alpha = None,
+        optim_target_modules = None,
+        batch_eval_metrics = False,
+        eval_on_start = False,
+        use_liger_kernel = False,
+        liger_kernel_config = None,
+        eval_use_gather_object = False,
+        average_tokens_across_devices = True,
+        reward_model_path = None,
+        judge = None,
+        max_new_tokens = 64,
+        max_length = 512,
+        temperature = 0.9,
+        missing_eos_penalty = None,
+        loss_type = 'sigmoid',
+        dataset_num_proc = None,
+        disable_dropout = True,
+        use_vllm = False,
+        vllm_model_impl = 'vllm',
+        gpu_memory_utilization = 0.55,
+        ds3_gather_for_generation = True,
+        model_init_kwargs = None,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        max_seq_length = None,
+        **kwargs,
+    ):
+        if learning_rate < 1e-7: raise FloatingPointError(f'Unsloth: Your learning rate of `{learning_rate}` is too small and less than 1e-7! Consider increasing it, otherwise gradient updates will be close to 0!')
+        if learning_rate > 1: raise OverflowError(f'Unsloth: Your learning rate of `{learning_rate}` is way too larger > 1! Consider decreasing it to 1e-1, otherwise gradient updates will explode!')
+        if output_dir is None and save_strategy == 'steps' and save_steps == 500:
+            output_dir = 'unsloth_training_checkpoints'
+            save_strategy = 'no'
+        if dataset_num_proc is None:
+            from multiprocessing import cpu_count
+            dataset_num_proc = min(cpu_count()*2, 2)
+        if temperature <= 0:
+            raise MathError('Unsloth: Please set a positive non-zero temperature since your results will be wrong.')
+        elif temperature >= 10:
+            raise MathError('Unsloth: Please set a positive non-zero temperature less than 10, since sampling will be quite erratic.')
+        
+        
+        super().__init__(
+            output_dir = output_dir,
+            overwrite_output_dir = overwrite_output_dir,
+            do_train = do_train,
+            do_eval = do_eval,
+            do_predict = do_predict,
+            eval_strategy = eval_strategy,
+            prediction_loss_only = prediction_loss_only,
+            per_device_train_batch_size = per_device_train_batch_size,
+            per_device_eval_batch_size = per_device_eval_batch_size,
+            per_gpu_train_batch_size = per_gpu_train_batch_size,
+            per_gpu_eval_batch_size = per_gpu_eval_batch_size,
+            gradient_accumulation_steps = gradient_accumulation_steps,
+            eval_accumulation_steps = eval_accumulation_steps,
+            eval_delay = eval_delay,
+            torch_empty_cache_steps = torch_empty_cache_steps,
+            learning_rate = learning_rate,
+            weight_decay = weight_decay,
+            adam_beta1 = adam_beta1,
+            adam_beta2 = adam_beta2,
+            adam_epsilon = adam_epsilon,
+            max_grad_norm = max_grad_norm,
+            num_train_epochs = num_train_epochs,
+            max_steps = max_steps,
+            lr_scheduler_type = lr_scheduler_type,
+            warmup_ratio = warmup_ratio,
+            warmup_steps = warmup_steps,
+            log_level = log_level,
+            log_level_replica = log_level_replica,
+            log_on_each_node = log_on_each_node,
+            logging_dir = logging_dir,
+            logging_strategy = logging_strategy,
+            logging_first_step = logging_first_step,
+            logging_steps = logging_steps,
+            logging_nan_inf_filter = logging_nan_inf_filter,
+            save_strategy = save_strategy,
+            save_steps = save_steps,
+            save_total_limit = save_total_limit,
+            save_safetensors = save_safetensors,
+            save_on_each_node = save_on_each_node,
+            save_only_model = save_only_model,
+            restore_callback_states_from_checkpoint = restore_callback_states_from_checkpoint,
+            no_cuda = no_cuda,
+            use_cpu = use_cpu,
+            use_mps_device = use_mps_device,
+            seed = seed,
+            data_seed = data_seed,
+            jit_mode_eval = jit_mode_eval,
+            use_ipex = use_ipex,
+            bf16 = bf16,
+            fp16 = fp16,
+            fp16_opt_level = fp16_opt_level,
+            half_precision_backend = half_precision_backend,
+            bf16_full_eval = bf16_full_eval,
+            fp16_full_eval = fp16_full_eval,
+            tf32 = tf32,
+            local_rank = local_rank,
+            ddp_backend = ddp_backend,
+            tpu_num_cores = tpu_num_cores,
+            tpu_metrics_debug = tpu_metrics_debug,
+            debug = debug,
+            dataloader_drop_last = dataloader_drop_last,
+            eval_steps = eval_steps,
+            dataloader_num_workers = dataloader_num_workers,
+            dataloader_prefetch_factor = dataloader_prefetch_factor,
+            past_index = past_index,
+            run_name = run_name,
+            disable_tqdm = disable_tqdm,
+            remove_unused_columns = remove_unused_columns,
+            label_names = label_names,
+            load_best_model_at_end = load_best_model_at_end,
+            metric_for_best_model = metric_for_best_model,
+            greater_is_better = greater_is_better,
+            ignore_data_skip = ignore_data_skip,
+            fsdp = fsdp,
+            fsdp_min_num_params = fsdp_min_num_params,
+            fsdp_config = fsdp_config,
+            fsdp_transformer_layer_cls_to_wrap = fsdp_transformer_layer_cls_to_wrap,
+            accelerator_config = accelerator_config,
+            deepspeed = deepspeed,
+            label_smoothing_factor = label_smoothing_factor,
+            optim = optim,
+            optim_args = optim_args,
+            adafactor = adafactor,
+            group_by_length = group_by_length,
+            length_column_name = length_column_name,
+            report_to = report_to,
+            ddp_find_unused_parameters = ddp_find_unused_parameters,
+            ddp_bucket_cap_mb = ddp_bucket_cap_mb,
+            ddp_broadcast_buffers = ddp_broadcast_buffers,
+            dataloader_pin_memory = dataloader_pin_memory,
+            dataloader_persistent_workers = dataloader_persistent_workers,
+            skip_memory_metrics = skip_memory_metrics,
+            use_legacy_prediction_loop = use_legacy_prediction_loop,
+            push_to_hub = push_to_hub,
+            resume_from_checkpoint = resume_from_checkpoint,
+            hub_model_id = hub_model_id,
+            hub_strategy = hub_strategy,
+            hub_token = hub_token,
+            hub_private_repo = hub_private_repo,
+            hub_always_push = hub_always_push,
+            hub_revision = hub_revision,
+            gradient_checkpointing = gradient_checkpointing,
+            gradient_checkpointing_kwargs = gradient_checkpointing_kwargs,
+            include_inputs_for_metrics = include_inputs_for_metrics,
+            eval_do_concat_batches = eval_do_concat_batches,
+            fp16_backend = fp16_backend,
+            push_to_hub_model_id = push_to_hub_model_id,
+            push_to_hub_organization = push_to_hub_organization,
+            push_to_hub_token = push_to_hub_token,
+            mp_parameters = mp_parameters,
+            auto_find_batch_size = auto_find_batch_size,
+            full_determinism = full_determinism,
+            torchdynamo = torchdynamo,
+            ray_scope = ray_scope,
+            ddp_timeout = ddp_timeout,
+            torch_compile = torch_compile,
+            torch_compile_backend = torch_compile_backend,
+            torch_compile_mode = torch_compile_mode,
+            include_tokens_per_second = include_tokens_per_second,
+            include_num_input_tokens_seen = include_num_input_tokens_seen,
+            neftune_noise_alpha = neftune_noise_alpha,
+            optim_target_modules = optim_target_modules,
+            batch_eval_metrics = batch_eval_metrics,
+            eval_on_start = eval_on_start,
+            use_liger_kernel = use_liger_kernel,
+            liger_kernel_config = liger_kernel_config,
+            eval_use_gather_object = eval_use_gather_object,
+            average_tokens_across_devices = average_tokens_across_devices,
+            reward_model_path = reward_model_path,
+            judge = judge,
+            max_new_tokens = max_new_tokens,
+            max_length = max_length,
+            temperature = temperature,
+            missing_eos_penalty = missing_eos_penalty,
+            loss_type = loss_type,
+            dataset_num_proc = dataset_num_proc,
+            disable_dropout = disable_dropout,
+            use_vllm = use_vllm,
+            vllm_model_impl = vllm_model_impl,
+            gpu_memory_utilization = gpu_memory_utilization,
+            ds3_gather_for_generation = ds3_gather_for_generation,
+            model_init_kwargs = model_init_kwargs,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        self.max_seq_length = max_seq_length
+pass
+
+class _UnslothNashMDTrainer(OnlineDPOTrainer):
+    r""""""
+
+    _tag_names = ["trl", "nash-md"]
+
+    def __init__(
+        self,
+        model: Union[PreTrainedModel, nn.Module] = None,
+        ref_model: Union[PreTrainedModel, nn.Module] = None,
+        reward_model: Union[PreTrainedModel, nn.Module, None] = None,
+        judge: Optional[BasePairwiseJudge] = None,
+        args: Optional[NashMDConfig] = None,
+        data_collator: Optional[Callable] = None,
+        train_dataset: Optional[Union[Dataset, IterableDataset]] = None,
+        eval_dataset: Optional[Union[Dataset, dict[str, Dataset]]] = None,
+        processing_class: Optional[
+            Union[PreTrainedTokenizerBase, BaseImageProcessor, FeatureExtractionMixin, ProcessorMixin]
+        ] = None,
+        peft_config: Optional[dict] = None,
+        compute_metrics: Optional[Callable[[EvalPrediction], dict]] = None,
+        callbacks: Optional[list[TrainerCallback]] = None,
+        optimizers: tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR] = (None, None),
+        preprocess_logits_for_metrics: Optional[Callable[[torch.Tensor, torch.Tensor], torch.Tensor]] = None,
+    ) -> None:
+        super().__init__(
+            model=model,
+            ref_model=ref_model,
+            reward_model=reward_model,
+            judge=judge,
+            args=args,
+            data_collator=data_collator,
+            train_dataset=train_dataset,
+            eval_dataset=eval_dataset,
+            processing_class=processing_class,
+            reward_processing_class=processing_class,  # for now, NashMDTrainer can't use any reward model
+            peft_config=peft_config,
+            compute_metrics=compute_metrics,
+            callbacks=callbacks,
+            optimizers=optimizers,
+            preprocess_logits_for_metrics=preprocess_logits_for_metrics,
+        )
+
+        self._mixture_coef = self.args.mixture_coef
+
+        # Overwrite the stats dictionary to include NashMD specific statistics
+        self.stats = {
+            # Remove "non_score_reward", "rlhf_reward", "scores_margin"
+            # Add "mixture_coef"
+            "loss/kl": [],
+            "objective/entropy": [],
+            "loss/score": [],
+            "rewards/probabilities": [],
+            "rewards/accuracies": [],
+            "rewards/margins": [],
+            "logps/chosen": [],
+            "logps/rejected": [],
+            "val/model_contain_eos_token": [],
+            "val/ref_contain_eos_token": [],
+            "beta": [],
+            "mixture_coef": [],
+        }
+        if self.reward_model is not None:
+            self.stats["rewards/chosen"] = []
+            self.stats["rewards/rejected"] = []
+
+    @property
+    def mixture_coef(self):
+        if isinstance(self._mixture_coef, list):
+            epoch = self.state.epoch
+            return self._mixture_coef[epoch] if epoch < len(self._mixture_coef) else self._mixture_coef[-1]
+        else:
+            return self._mixture_coef
+
+    def _generate_completions(self, model, prompts):
+        # Generate completions from the policy model.
+        with unwrap_model_for_generation(model, self.accelerator) as unwrapped_policy_for_gen_ctx:
+            model_output = unwrapped_policy_for_gen_ctx.generate(
+                input_ids=prompts["input_ids"],
+                attention_mask=prompts["attention_mask"],
+                generation_config=self.generation_config,
+            )
+
+        # Get the DDP/FSDP unwrapped version of the main model.
+        # This will be the policy model for GeometricMixtureWrapper (PEFT adapters active if PEFT is used).
+        policy_model_for_gmw = self.accelerator.unwrap_model(model)
+
+        # Determine the correct reference model for GeometricMixtureWrapper.
+        # This also needs to be DDP/FSDP unwrapped.
+        ref_model_for_gmw: torch.nn.Module
+        if self.ref_model is None:
+            # No explicit ref_model is provided.
+            # Use the base of the main `model` if it's a PEFT model.
+            # policy_model_for_gmw is already DDP-unwrapped.
+            if is_peft_available() and isinstance(policy_model_for_gmw, PeftModel):
+                ref_model_for_gmw = policy_model_for_gmw.get_base_model()
+            else:
+                # Not a PEFT model (or PEFT not available), or already a base model.
+                # Use the DDP-unwrapped policy model itself as the reference.
+                ref_model_for_gmw = policy_model_for_gmw
+        else:
+            # An explicit ref_model is provided. Unwrap it for DDP/FSDP.
+            ref_model_for_gmw = self.accelerator.unwrap_model(self.ref_model)
+
+        # Both models given to GeometricMixtureWrapper (policy_model_for_gmw and ref_model_for_gmw) are DDP-unwrapped.
+        with torch.no_grad():  # Ensure no_grad context for mixture model generation
+            mixture_model = GeometricMixtureWrapper(
+                model=policy_model_for_gmw,
+                ref_model=ref_model_for_gmw,
+                generation_config=self.generation_config,
+                mixture_coef=self.mixture_coef,
+                device=self.accelerator.device,
+            )
+
+            mixture_output = mixture_model.generate(
+                input_ids=prompts["input_ids"],
+                attention_mask=prompts["attention_mask"],
+                generation_config=self.generation_config,
+            )
+
+        return model_output, mixture_output
+
+    def _process_completions(self, model_output, mixture_output, prompts):
+        context_length = prompts["input_ids"].shape[1]
+
+        # Process model completions
+        model_completion_ids = model_output[:, context_length:]
+        model_completion_ids, model_completion_mask = truncate_right(
+            model_completion_ids, self.processing_class.eos_token_id, self.processing_class.pad_token_id
+        )
+        model_data = {
+            "input_ids": torch.cat((prompts["input_ids"], model_completion_ids), dim=1),
+            "attention_mask": torch.cat((prompts["attention_mask"], model_completion_mask), dim=1),
+            "raw": prompts["raw"],
+        }
+
+        # Process reference model completions
+        mixture_completion_ids = mixture_output[:, context_length:]
+        mixture_completion_ids, mixture_completion_mask = truncate_right(
+            mixture_completion_ids, self.processing_class.eos_token_id, self.processing_class.pad_token_id
+        )
+        mixture_data = {
+            "input_ids": torch.cat((prompts["input_ids"], mixture_completion_ids), dim=1),
+            "attention_mask": torch.cat((prompts["attention_mask"], mixture_completion_mask), dim=1),
+            "raw": prompts["raw"],
+        }
+
+        return model_data, mixture_data
+
+    def _compute_rewards(self, model_data, mixture_data, context_length):
+        with torch.no_grad():
+            _, model_scores, _ = get_reward(
+                self.reward_model, model_data["input_ids"], self.processing_class.pad_token_id, context_length
+            )
+            _, mixture_scores, _ = get_reward(
+                self.reward_model, mixture_data["input_ids"], self.processing_class.pad_token_id, context_length
+            )
+
+        # Apply EOS penalty if needed
+        if self.args.missing_eos_penalty is not None:
+            model_contain_eos = torch.any(model_data["input_ids"] == self.processing_class.eos_token_id, dim=-1)
+            mixture_contain_eos = torch.any(mixture_data["input_ids"] == self.processing_class.eos_token_id, dim=-1)
+            model_scores[~model_contain_eos] -= self.args.missing_eos_penalty
+            mixture_scores[~mixture_contain_eos] -= self.args.missing_eos_penalty
+
+        return model_scores, mixture_scores
+
+    def _compute_judge(self, model_data, mixture_data, context_length):
+        prompts = model_data["raw"]
+        model_data_completions = self.processing_class.batch_decode(
+            model_data["input_ids"][:, context_length:], skip_special_tokens=True
+        )
+        model_data_completions = [completion.strip() for completion in model_data_completions]
+
+        mixture_data_completions = self.processing_class.batch_decode(
+            mixture_data["input_ids"][:, context_length:], skip_special_tokens=True
+        )
+        mixture_data_completions = [completion.strip() for completion in mixture_data_completions]
+        if is_conversational({"prompt": prompts[0]}):
+            model_data_completions = [
+                [{"role": "assistant", "content": completion}] for completion in model_data_completions
+            ]
+            environment = jinja2.Environment()
+            template = environment.from_string(SIMPLE_CHAT_TEMPLATE)
+            prompts = [template.render(messages=message) for message in prompts]
+            model_data_completions = [template.render(messages=completion) for completion in model_data_completions]
+
+            mixture_data_completions = [
+                [{"role": "assistant", "content": completion}] for completion in mixture_data_completions
+            ]
+            mixture_data_completions = [
+                template.render(messages=completion) for completion in mixture_data_completions
+            ]
+
+        probability = self.judge.judge(
+            prompts,
+            list(zip(model_data_completions, mixture_data_completions)),
+            return_scores=True,
+        )
+        return torch.tensor(probability, device=model_data["input_ids"].device)
+
+    def _compute_logprobs(self, model, model_data, context_length):
+        def compute_logprobs_for_data(m, data):
+            output = m(data["input_ids"], attention_mask=data["attention_mask"])
+            logits = output.logits[:, context_length - 1 : -1]
+            token_logprobs = selective_log_softmax(logits, data["input_ids"][:, context_length:])
+            return token_logprobs
+
+        # Compute logprobs for model completions under the model
+        model_logprobs_model_data = compute_logprobs_for_data(model, model_data)
+
+        # Compute logprobs of model completions under the reference model
+        with torch.no_grad():
+            if self.ref_model is None:
+                with model.disable_adapter():
+                    ref_logprobs_model_data = compute_logprobs_for_data(model, model_data)
+            else:
+                ref_logprobs_model_data = compute_logprobs_for_data(self.ref_model, model_data)
+
+        # Mask padding tokens
+        model_padding_mask = model_data["attention_mask"][:, context_length:] == 0
+        model_logprobs_model_data = model_logprobs_model_data.masked_fill(model_padding_mask, 0.0)
+        ref_logprobs_model_data = ref_logprobs_model_data.masked_fill(model_padding_mask, 0.0)
+
+        return (model_logprobs_model_data, ref_logprobs_model_data)
+
+    def _compute_losses(
+        self,
+        model_logprobs_model_data,
+        ref_logprobs_model_data,
+        probability,
+    ):
+        # reinforce score where 0.5 is a control variate
+        score = (probability - 0.5) * model_logprobs_model_data.sum(1)
+
+        # kl divergence via reinforce
+        with torch.no_grad():
+            log_ratio = model_logprobs_model_data - ref_logprobs_model_data
+            kl_div_log = log_ratio.sum(1)
+        kl_div_loss = (log_ratio * model_logprobs_model_data).sum(1)
+
+        # final loss
+        loss = self.beta * kl_div_loss - score
+
+        return loss.mean(), score, kl_div_log
+
+    def _log_statistics(
+        self,
+        model_data,
+        mixture_data,
+        model_logprobs_model_data,
+        ref_logprobs_model_data,
+        probability,
+        score,
+        kl_div,
+        context_length,
+        model_scores=None,
+        mixture_scores=None,
+    ):
+        # Helper function to gather and compute mean
+        def gather_mean(tensor):
+            return self.accelerator.gather_for_metrics(tensor).mean().item()
+
+        # Log score
+        self.stats["loss/score"].append(gather_mean(score))
+        # Log KL divergence
+        self.stats["loss/kl"].append(gather_mean(kl_div))
+
+        # Log logprobs
+        model_logprobs_model_data_sum = model_logprobs_model_data.sum(1)
+        ref_logprobs_model_data_sum = ref_logprobs_model_data.sum(1)
+
+        self.stats["logps/chosen"].append(gather_mean(model_logprobs_model_data_sum))
+        self.stats["logps/rejected"].append(gather_mean(ref_logprobs_model_data_sum))
+
+        # Log rewards
+        if self.reward_model is not None:
+            self.stats["rewards/chosen"].append(gather_mean(model_scores))
+            self.stats["rewards/rejected"].append(gather_mean(mixture_scores))
+
+        # Log probabilities
+        self.stats["rewards/probabilities"].append(gather_mean(probability))
+
+        # Calculate entropy for model data
+        entropy_model_data = -model_logprobs_model_data.sum(1)
+        self.stats["objective/entropy"].append(gather_mean(entropy_model_data))
+
+        # Calculate margins
+        margin = model_logprobs_model_data_sum - ref_logprobs_model_data_sum
+        self.stats["rewards/margins"].append(gather_mean(margin))
+
+        # Calculate accuracy
+        accuracy = (margin > 0).float()
+        self.stats["rewards/accuracies"].append(gather_mean(accuracy))
+
+        # Log EOS token statistics
+        model_eos = (model_data["input_ids"][:, context_length:] == self.processing_class.eos_token_id).any(dim=1)
+        mixture_eos = (mixture_data["input_ids"][:, context_length:] == self.processing_class.eos_token_id).any(dim=1)
+        self.stats["val/model_contain_eos_token"].append(gather_mean(model_eos.float()))
+        self.stats["val/ref_contain_eos_token"].append(gather_mean(mixture_eos.float()))
+
+        # Log beta and mixture coef
+        self.stats["beta"].append(self.beta)
+        self.stats["mixture_coef"].append(self.mixture_coef)
+
+    def training_step(
+        self, model: nn.Module, inputs: dict[str, Union[torch.Tensor, Any]], num_items_in_batch: Optional[int] = None
+    ) -> torch.Tensor:
+        model.train()
+
+        # Apply chat template and tokenize the input
+        batch_size = len(next(iter(inputs.values())))
+        prompts = inputs["prompt"]
+        inputs = [{k: v[i] for k, v in inputs.items()} for i in range(batch_size)]
+        inputs = [maybe_apply_chat_template(x, self.processing_class) for x in inputs]
+        inputs = [self.tokenize_row(x, self.model.config.is_encoder_decoder, self.processing_class) for x in inputs]
+        inputs = self.data_collator(inputs)
+
+        # need the prompt_ only
+        inputs = self._prepare_inputs(inputs)
+        context_length = inputs["prompt_input_ids"].shape[1]
+        prompts = {
+            "input_ids": inputs["prompt_input_ids"],
+            "attention_mask": inputs["prompt_attention_mask"],
+            "raw": prompts,
+        }
+        del inputs
+
+        # Sample completions from both the model and the reference model
+        model_output, mixture_output = self._generate_completions(model, prompts)
+
+        # Process model completions
+        model_data, mixture_data = self._process_completions(model_output, mixture_output, prompts)
+
+        # Compute rewards
+        if self.reward_model is not None:
+            model_scores, mixture_scores = self._compute_rewards(model_data, mixture_data, context_length)
+            # probability of the model data vs the mixture data
+            probability = F.sigmoid(model_scores - mixture_scores)
+        else:
+            model_scores, mixture_scores = None, None
+            probability = self._compute_judge(model_data, mixture_data, context_length)
+
+        # Compute logprobs
+        model_logprobs_model_data, ref_logprobs_model_data = self._compute_logprobs(model, model_data, context_length)
+
+        # Compute loss
+        loss, score, kl_div = self._compute_losses(model_logprobs_model_data, ref_logprobs_model_data, probability)
+
+        # Log everything
+        self._log_statistics(
+            model_data,
+            mixture_data,
+            model_logprobs_model_data.detach(),
+            ref_logprobs_model_data,
+            probability,
+            score.detach(),
+            kl_div.detach(),
+            context_length,
+            model_scores,
+            mixture_scores,
+        )
+
+        if (
+            self.args.torch_empty_cache_steps is not None
+            and self.state.global_step % self.args.torch_empty_cache_steps == 0
+        ):
+            empty_cache()
+
+        kwargs = {}
+        # For LOMO optimizers you need to explicitly use the learning rate
+        if self.args.optim in [OptimizerNames.LOMO, OptimizerNames.ADALOMO]:
+            kwargs["learning_rate"] = self._get_learning_rate()
+
+        if self.args.n_gpu > 1:
+            loss = loss.mean()  # mean() to average on multi-gpu parallel training
+
+        if self.use_apex:
+            with amp.scale_loss(loss, self.optimizer) as scaled_loss:
+                scaled_loss.backward()
+        else:
+            self.accelerator.backward(loss, **kwargs)
+
+        return loss.detach() / self.args.gradient_accumulation_steps
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        citation = textwrap.dedent("""\
+        @inproceedings{munos2024nash,
+            title        = {{Nash Learning from Human Feedback}},
+            author       = {R{\'{e}}mi Munos and Michal Valko and Daniele Calandriello and Mohammad Gheshlaghi Azar and Mark Rowland and Zhaohan Daniel Guo and Yunhao Tang and Matthieu Geist and Thomas Mesnard and C{\\^{o}}me Fiegel and Andrea Michi and Marco Selvi and Sertan Girgin and Nikola Momchev and Olivier Bachem and Daniel J. Mankowitz and Doina Precup and Bilal Piot},
+            year         = 2024,
+            booktitle    = {Forty-first International Conference on Machine Learning, {ICML} 2024, Vienna, Austria, July 21-27, 2024},
+            publisher    = {OpenReview.net},
+            url          = {https://openreview.net/forum?id=Y5AmNYiyCQ}
+        }""")
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="Nash-MD",
+            trainer_citation=citation,
+            paper_title="Nash Learning from Human Feedback",
+            paper_id="2312.00886",
+        )
+
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothNashMDTrainer(_UnslothNashMDTrainer):
+    """
+    
+    Initialize NashMDTrainer as a subclass of [`OnlineDPOConfig`].
+
+    Args:
+        model (`transformers.PreTrainedModel`):
+            The model to train, preferably an `AutoModelForCausalLM`.
+        ref_model (`PreTrainedModelWrapper`):
+            Hugging Face transformer model with a casual language modelling head. Used for implicit reward computation
+            and loss. If no reference model is provided, the trainer will create a reference model with the same
+            architecture as the model to be optimized.
+        reward_model (`transformers.PreTrainedModel`):
+            The reward model to score completions with, preferably an `AutoModelForSequenceClassification`.
+        judge (`BasePairwiseJudge`):
+            The judge to use for pairwise comparison of model completions.
+        args (`NashMDConfig`):
+            The NashMD config arguments to use for training.
+        data_collator (`transformers.DataCollator`):
+            The data collator to use for training. If None is specified, the default data collator
+            (`DPODataCollatorWithPadding`) will be used which will pad the sequences to the maximum length of the
+            sequences in the batch, given a dataset of paired sequences.
+        train_dataset (`datasets.Dataset`):
+            The dataset to use for training.
+        eval_dataset (`datasets.Dataset`):
+            The dataset to use for evaluation.
+        processing_class ([`~transformers.PreTrainedTokenizerBase`], [`~transformers.BaseImageProcessor`], [`~transformers.FeatureExtractionMixin`] or [`~transformers.ProcessorMixin`], *optional*, defaults to `None`):
+            Processing class used to process the data. If provided, will be used to automatically process the inputs
+            for the model, and it will be saved along the model to make it easier to rerun an interrupted training or
+            reuse the fine-tuned model.
+        peft_config (`dict`):
+            The peft config to use for training.
+        compute_metrics (`Callable[[EvalPrediction], dict]`, *optional*):
+            The function to use to compute the metrics. Must take a `EvalPrediction` and return a dictionary string to
+            metric values.
+        callbacks (`list[transformers.TrainerCallback]`):
+            The callbacks to use for training.
+        optimizers (`tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR]`):
+            The optimizer and scheduler to use for training.
+        preprocess_logits_for_metrics (`Callable[[torch.Tensor, torch.Tensor], torch.Tensor]`):
+            The function to use to preprocess the logits before computing the metrics.
+    
+    """
+    def __init__(
+        self,
+        model = None,
+        ref_model = None,
+        reward_model = None,
+        judge = None,
+        args = None,
+        data_collator = None,
+        train_dataset = None,
+        eval_dataset = None,
+        processing_class = None,
+        peft_config = None,
+        compute_metrics = None,
+        callbacks = None,
+        preprocess_logits_for_metrics = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothNashMDConfig()
+        use_bf16 = getattr(args, 'bf16', False)
+        if type(use_bf16) is not bool: use_bf16 = False
+        use_fp16 = getattr(args, 'fp16', False)
+        if type(use_fp16) is not bool: use_fp16 = False
+        force_float32 = False
+        if os.environ.get('UNSLOTH_FORCE_FLOAT32', '0') == '1':
+            print('Unsloth: Switching to float32 training since model cannot work with float16')
+            force_float32 = True
+        mixed_precision_dtype = os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32')
+        dtype = getattr(model.config, 'torch_dtype', None)
+        if dtype is None: dtype = model.get_input_embeddings().dtype
+        from unsloth_zoo.utils import _get_dtype
+        dtype = _get_dtype(dtype)
+        float16 = dtype == torch.float16
+        if not force_float32 and (float16 and use_bf16): raise TypeError('Unsloth: Model is in float16 precision but you want to use bfloat16 precision. Set fp16 to `True` and bf16 to `False`')
+        if not force_float32 and (not float16 and use_fp16): raise TypeError('Unsloth: Model is in bfloat16 precision but you want to use float16 precision. Set fp16 to `False` and bf16 to `True`')
+        if force_float32:
+            args.fp16 = False
+            args.bf16 = False
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'no'
+        elif (not use_bf16 and not use_fp16) and mixed_precision_dtype == 'float32':
+            args.fp16 = float16
+            args.bf16 = not float16
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'fp16' if float16 else 'bf16'
+        if getattr(args, 'eval_dataset', None) is not None and getattr(args, 'eval_strategy', 'no') == 'no':
+            args.eval_strategy = 'steps'
+            if getattr(args, 'eval_steps', None) is None: args.eval_steps = 0.1
+        ga_steps = getattr(args, 'gradient_accumulation_steps', None)
+        if ga_steps is not None and ga_steps > 1:
+            from transformers import __version__ as transformers_version
+            if Version(transformers_version) <= Version('4.45.2'):
+                print('**** Unsloth: Please use our fixed gradient_accumulation_steps by updating transformers, TRL and Unsloth!\n'
+                      '`pip install --upgrade --no-cache-dir --force-reinstall --no-deps unsloth transformers trl unsloth_zoo`')
+        if getattr(args, 'eval_strategy', 'no') != 'no':
+            eval_bsz = getattr(args, 'per_device_eval_batch_size', 8)
+            if eval_bsz == 8 and args.per_device_train_batch_size < eval_bsz: args.per_device_eval_batch_size = args.per_device_train_batch_size
+            if getattr(args, 'eval_accumulation_steps', None) is None and ga_steps is not None: args.eval_accumulation_steps = ga_steps
+        fp16_full_eval = getattr(args, 'fp16_full_eval', False)
+        if type(fp16_full_eval) is not bool: fp16_full_eval = False
+        bf16_full_eval = getattr(args, 'bf16_full_eval', False)
+        if type(bf16_full_eval) is not bool: bf16_full_eval = False
+        if args.fp16 and bf16_full_eval: args.bf16_full_eval = False; args.fp16_full_eval = True
+        if args.bf16 and fp16_full_eval: args.bf16_full_eval = True; args.fp16_full_eval = False
+        if force_float32:
+            args.bf16_full_eval = False
+            args.fp16_full_eval = False
+        elif os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32') == 'bfloat16':
+            args.bf16_full_eval = True
+            args.fp16_full_eval = False
+        elif not bf16_full_eval and not fp16_full_eval:
+            args.bf16_full_eval = args.bf16
+            args.fp16_full_eval = args.fp16
+        _output_logits = False
+        if locals().get('compute_metrics', None) is not None: _output_logits = True
+        if locals().get('preprocess_logits_for_metrics', None) is not None: _output_logits = True
+        if _output_logits:
+            os.environ['UNSLOTH_RETURN_LOGITS'] = '1'
+        if 'max_seq_length' not in locals() and not hasattr(args, 'max_seq_length'):
+            pass
+        else:
+            model_max_seq_length = getattr(model, 'max_seq_length', None)
+            args_max_seq_length  = getattr(args,  'max_seq_length', None)
+            if args_max_seq_length is None and model_max_seq_length is not None:
+                max_seq_length = model.max_seq_length
+                if hasattr(args, 'max_seq_length'): args.max_seq_length = max_seq_length
+        if model is not None and hasattr(model, 'for_training'):
+            model.for_training()
+        if 'tokenizer' in locals() and hasattr(tokenizer, 'padding_side'): tokenizer.padding_side = 'right'
+        if 'processing_class' in locals():
+            if hasattr(processing_class, 'padding_side'): processing_class.padding_side = 'right'
+            if hasattr(processing_class, 'tokenizer') and hasattr(processing_class.tokenizer, 'padding_side'): processing_class.tokenizer.padding_side = 'right'
+        __tokenizer = processing_class if 'processing_class' in locals() else tokenizer
+        from unsloth_zoo.vision_utils import UnslothVisionDataCollator
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if isinstance(data_collator, DataCollatorForSeq2Seq) and 'labels' not in train_dataset.column_names:
+                data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False, mlm_probability = 0.0)
+            elif isinstance(data_collator, TransformersDataCollatorForLanguageModeling) and 'labels' in train_dataset.column_names:
+                data_collator = DataCollatorForSeq2Seq(__tokenizer)
+        else:
+            if hasattr(args, 'remove_unused_columns'): args.remove_unused_columns = False
+            if hasattr(args, 'dataset_text_field'): args.dataset_text_field = ''
+            if hasattr(args, 'dataset_kwargs'): args.dataset_kwargs = {'skip_prepare_dataset': True}
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if not hasattr(__tokenizer, 'pad') and hasattr(__tokenizer, 'tokenizer'):
+                if isinstance(data_collator, DataCollatorForSeq2Seq):
+                    data_collator = DataCollatorForSeq2Seq(__tokenizer.tokenizer)
+                else:
+                    data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False, mlm_probability = 0.0)
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('nash_md_trainer', other_metrics)
+        
+        super().__init__(
+            model = model,
+            ref_model = ref_model,
+            reward_model = reward_model,
+            judge = judge,
+            args = args,
+            data_collator = data_collator,
+            train_dataset = train_dataset,
+            eval_dataset = eval_dataset,
+            processing_class = processing_class,
+            peft_config = peft_config,
+            compute_metrics = compute_metrics,
+            callbacks = callbacks,
+            preprocess_logits_for_metrics = preprocess_logits_for_metrics,**kwargs)
+        if hasattr(self, 'neftune_hook_handle'):
+            self.neftune_hook_handle.remove()
+            if hasattr(self, 'neftune_hook_handle'): del self.neftune_hook_handle
+        if getattr(args, 'neftune_noise_alpha', None) is not None:
+            model.get_input_embeddings().neftune_noise_alpha = self.neftune_noise_alpha
+        pass
+        if hasattr(self, 'accelerator'):
+            scaler = self.accelerator.scaler
+            current_model = model
+            while hasattr(current_model, 'model'):
+                current_model.accelerator_scaler = scaler
+                current_model = current_model.model
+            current_model.accelerator_scaler = scaler
+        pass
+        
+pass

unsloth_compiled_cache/UnslothORPOTrainer.py

@@ -0,0 +1,1574 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.orpo_trainer import (Any, AutoModelForCausalLM, BaseImageProcessor, Callable, DPODataCollatorWithPadding, DataCollator, DataLoader, Dataset, EvalLoopOutput, F, FeatureExtractionMixin, Literal, ORPOConfig, ORPOTrainer, Optional, PartialState, Path, PeftModel, PreTrainedModel, PreTrainedTokenizerBase, ProcessorMixin, Trainer, TrainerCallback, Union, add_bos_token_if_needed, add_eos_token_if_needed, autocast, defaultdict, disable_dropout_in_model, generate_model_card, get_comet_experiment_url, inspect, is_comet_available, is_peft_available, is_torch_fx_proxy, is_torch_xla_available, is_wandb_available, log_table_to_comet_experiment, maybe_apply_chat_template, maybe_extract_prompt, nn, np, nullcontext, os, pad_to_length, pd, peft_module_casting_to_bf16, prepare_model_for_kbit_training, random, selective_log_softmax, textwrap, torch, wandb, warnings, F, Optional, PeftModel, PreTrainedModel, Trainer, is_peft_available, os, torch)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothORPOConfig(ORPOConfig):
+    """
+    
+    Configuration class for the [`ORPOTrainer`].
+
+    This class includes only the parameters that are specific to ORPO training. For a full list of training arguments,
+    please refer to the [`~transformers.TrainingArguments`] documentation. Note that default values in this class may
+    differ from those in [`~transformers.TrainingArguments`].
+
+    Using [`~transformers.HfArgumentParser`] we can turn this class into
+    [argparse](https://docs.python.org/3/library/argparse#module-argparse) arguments that can be specified on the
+    command line.
+
+    Parameters:
+        max_length (`int` or `None`, *optional*, defaults to `1024`):
+            Maximum length of the sequences (prompt + completion) in the batch. This argument is required if you want
+            to use the default data collator.
+        max_prompt_length (`int` or `None`, *optional*, defaults to `512`):
+            Maximum length of the prompt. This argument is required if you want to use the default data collator.
+        max_completion_length (`int` or `None`, *optional*, defaults to `None`):
+            Maximum length of the completion. This argument is required if you want to use the default data collator
+            and your model is an encoder-decoder.
+        beta (`float`, *optional*, defaults to `0.1`):
+            Parameter controlling the relative ratio loss weight in the ORPO loss. In the
+            [paper](https://huggingface.co/papers/2403.07691), it is denoted by λ. In the
+            [code](https://github.com/xfactlab/orpo), it is denoted by `alpha`.
+        disable_dropout (`bool`, *optional*, defaults to `True`):
+            Whether to disable dropout in the model.
+        label_pad_token_id (`int`, *optional*, defaults to `-100`):
+            Label pad token id. This argument is required if you want to use the default data collator.
+        padding_value (`int` or `None`, *optional*, defaults to `None`):
+            Padding value to use. If `None`, the padding value of the tokenizer is used.
+        truncation_mode (`str`, *optional*, defaults to `"keep_end"`):
+            Truncation mode to use when the prompt is too long. Possible values are `"keep_end"` or `"keep_start"`.
+            This argument is required if you want to use the default data collator.
+        generate_during_eval (`bool`, *optional*, defaults to `False`):
+            If `True`, generates and logs completions from the model to W&B or Comet during evaluation.
+        is_encoder_decoder (`bool` or `None`, *optional*, defaults to `None`):
+            When using the `model_init` argument (callable) to instantiate the model instead of the `model` argument,
+            you need to specify if the model returned by the callable is an encoder-decoder model.
+        model_init_kwargs (`dict[str, Any]` or `None`, *optional*, defaults to `None`):
+            Keyword arguments to pass to `AutoModelForCausalLM.from_pretrained` when instantiating the model from a
+            string.
+        dataset_num_proc (`int` or `None`, *optional*, defaults to `None`):
+            Number of processes to use for processing the dataset.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    max_seq_length : Optional[int] = field(
+        default = None,
+        metadata = {'help': 'Maximum sequence length to truncate to.'},
+    )
+    def __init__(
+        self,
+        output_dir = None,
+        overwrite_output_dir = None,
+        do_train = False,
+        do_eval = False,
+        do_predict = False,
+        eval_strategy = 'no',
+        prediction_loss_only = False,
+        per_device_train_batch_size = 4,
+        per_device_eval_batch_size = 4,
+        per_gpu_train_batch_size = None,
+        per_gpu_eval_batch_size = None,
+        gradient_accumulation_steps = 2,
+        eval_accumulation_steps = 2,
+        eval_delay = 0,
+        torch_empty_cache_steps = 250,
+        learning_rate = 5e-05,
+        weight_decay = 0.01,
+        adam_beta1 = 0.9,
+        adam_beta2 = 0.999,
+        adam_epsilon = 1e-08,
+        max_grad_norm = 1.0,
+        num_train_epochs = 3.0,
+        max_steps = -1,
+        lr_scheduler_type = 'linear',
+        warmup_ratio = 0.1,
+        warmup_steps = 0,
+        log_level = 'passive',
+        log_level_replica = 'warning',
+        log_on_each_node = True,
+        logging_dir = None,
+        logging_strategy = 'steps',
+        logging_first_step = False,
+        logging_steps = 1,
+        logging_nan_inf_filter = False,
+        save_strategy = 'steps',
+        save_steps = 500,
+        save_total_limit = None,
+        save_safetensors = True,
+        save_on_each_node = False,
+        save_only_model = False,
+        restore_callback_states_from_checkpoint = False,
+        no_cuda = False,
+        use_cpu = False,
+        use_mps_device = False,
+        seed = 3407,
+        data_seed = 3407,
+        jit_mode_eval = False,
+        use_ipex = False,
+        bf16 = False,
+        fp16 = False,
+        fp16_opt_level = 'O1',
+        half_precision_backend = 'auto',
+        bf16_full_eval = False,
+        fp16_full_eval = False,
+        tf32 = None,
+        local_rank = -1,
+        ddp_backend = None,
+        tpu_num_cores = None,
+        tpu_metrics_debug = False,
+        debug = '',
+        dataloader_drop_last = False,
+        eval_steps = None,
+        dataloader_num_workers = 0,
+        dataloader_prefetch_factor = None,
+        past_index = -1,
+        run_name = None,
+        disable_tqdm = None,
+        remove_unused_columns = True,
+        label_names = None,
+        load_best_model_at_end = False,
+        metric_for_best_model = None,
+        greater_is_better = None,
+        ignore_data_skip = False,
+        fsdp = '',
+        fsdp_min_num_params = 0,
+        fsdp_config = None,
+        fsdp_transformer_layer_cls_to_wrap = None,
+        accelerator_config = None,
+        deepspeed = None,
+        label_smoothing_factor = 0.0,
+        optim = 'adamw_8bit',
+        optim_args = None,
+        adafactor = False,
+        group_by_length = False,
+        length_column_name = 'length',
+        report_to = None,
+        ddp_find_unused_parameters = None,
+        ddp_bucket_cap_mb = None,
+        ddp_broadcast_buffers = None,
+        dataloader_pin_memory = True,
+        dataloader_persistent_workers = False,
+        skip_memory_metrics = True,
+        use_legacy_prediction_loop = False,
+        push_to_hub = False,
+        resume_from_checkpoint = None,
+        hub_model_id = None,
+        hub_strategy = 'every_save',
+        hub_token = None,
+        hub_private_repo = None,
+        hub_always_push = False,
+        hub_revision = None,
+        gradient_checkpointing = False,
+        gradient_checkpointing_kwargs = None,
+        include_inputs_for_metrics = False,
+        eval_do_concat_batches = True,
+        fp16_backend = 'auto',
+        push_to_hub_model_id = None,
+        push_to_hub_organization = None,
+        push_to_hub_token = None,
+        mp_parameters = '',
+        auto_find_batch_size = True,
+        full_determinism = False,
+        torchdynamo = None,
+        ray_scope = 'last',
+        ddp_timeout = 1800,
+        torch_compile = False,
+        torch_compile_backend = None,
+        torch_compile_mode = None,
+        include_tokens_per_second = False,
+        include_num_input_tokens_seen = False,
+        neftune_noise_alpha = None,
+        optim_target_modules = None,
+        batch_eval_metrics = False,
+        eval_on_start = False,
+        use_liger_kernel = False,
+        liger_kernel_config = None,
+        eval_use_gather_object = False,
+        average_tokens_across_devices = True,
+        max_length = 1024,
+        max_prompt_length = 512,
+        max_completion_length = None,
+        beta = 0.1,
+        disable_dropout = True,
+        label_pad_token_id = -100,
+        padding_value = None,
+        truncation_mode = 'keep_end',
+        generate_during_eval = False,
+        is_encoder_decoder = None,
+        model_init_kwargs = None,
+        dataset_num_proc = None,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        max_seq_length = None,
+        **kwargs,
+    ):
+        if learning_rate < 1e-7: raise FloatingPointError(f'Unsloth: Your learning rate of `{learning_rate}` is too small and less than 1e-7! Consider increasing it, otherwise gradient updates will be close to 0!')
+        if learning_rate > 1: raise OverflowError(f'Unsloth: Your learning rate of `{learning_rate}` is way too larger > 1! Consider decreasing it to 1e-1, otherwise gradient updates will explode!')
+        if output_dir is None and save_strategy == 'steps' and save_steps == 500:
+            output_dir = 'unsloth_training_checkpoints'
+            save_strategy = 'no'
+        if dataset_num_proc is None:
+            from multiprocessing import cpu_count
+            dataset_num_proc = min(cpu_count()*2, 2)
+        
+        super().__init__(
+            output_dir = output_dir,
+            overwrite_output_dir = overwrite_output_dir,
+            do_train = do_train,
+            do_eval = do_eval,
+            do_predict = do_predict,
+            eval_strategy = eval_strategy,
+            prediction_loss_only = prediction_loss_only,
+            per_device_train_batch_size = per_device_train_batch_size,
+            per_device_eval_batch_size = per_device_eval_batch_size,
+            per_gpu_train_batch_size = per_gpu_train_batch_size,
+            per_gpu_eval_batch_size = per_gpu_eval_batch_size,
+            gradient_accumulation_steps = gradient_accumulation_steps,
+            eval_accumulation_steps = eval_accumulation_steps,
+            eval_delay = eval_delay,
+            torch_empty_cache_steps = torch_empty_cache_steps,
+            learning_rate = learning_rate,
+            weight_decay = weight_decay,
+            adam_beta1 = adam_beta1,
+            adam_beta2 = adam_beta2,
+            adam_epsilon = adam_epsilon,
+            max_grad_norm = max_grad_norm,
+            num_train_epochs = num_train_epochs,
+            max_steps = max_steps,
+            lr_scheduler_type = lr_scheduler_type,
+            warmup_ratio = warmup_ratio,
+            warmup_steps = warmup_steps,
+            log_level = log_level,
+            log_level_replica = log_level_replica,
+            log_on_each_node = log_on_each_node,
+            logging_dir = logging_dir,
+            logging_strategy = logging_strategy,
+            logging_first_step = logging_first_step,
+            logging_steps = logging_steps,
+            logging_nan_inf_filter = logging_nan_inf_filter,
+            save_strategy = save_strategy,
+            save_steps = save_steps,
+            save_total_limit = save_total_limit,
+            save_safetensors = save_safetensors,
+            save_on_each_node = save_on_each_node,
+            save_only_model = save_only_model,
+            restore_callback_states_from_checkpoint = restore_callback_states_from_checkpoint,
+            no_cuda = no_cuda,
+            use_cpu = use_cpu,
+            use_mps_device = use_mps_device,
+            seed = seed,
+            data_seed = data_seed,
+            jit_mode_eval = jit_mode_eval,
+            use_ipex = use_ipex,
+            bf16 = bf16,
+            fp16 = fp16,
+            fp16_opt_level = fp16_opt_level,
+            half_precision_backend = half_precision_backend,
+            bf16_full_eval = bf16_full_eval,
+            fp16_full_eval = fp16_full_eval,
+            tf32 = tf32,
+            local_rank = local_rank,
+            ddp_backend = ddp_backend,
+            tpu_num_cores = tpu_num_cores,
+            tpu_metrics_debug = tpu_metrics_debug,
+            debug = debug,
+            dataloader_drop_last = dataloader_drop_last,
+            eval_steps = eval_steps,
+            dataloader_num_workers = dataloader_num_workers,
+            dataloader_prefetch_factor = dataloader_prefetch_factor,
+            past_index = past_index,
+            run_name = run_name,
+            disable_tqdm = disable_tqdm,
+            remove_unused_columns = remove_unused_columns,
+            label_names = label_names,
+            load_best_model_at_end = load_best_model_at_end,
+            metric_for_best_model = metric_for_best_model,
+            greater_is_better = greater_is_better,
+            ignore_data_skip = ignore_data_skip,
+            fsdp = fsdp,
+            fsdp_min_num_params = fsdp_min_num_params,
+            fsdp_config = fsdp_config,
+            fsdp_transformer_layer_cls_to_wrap = fsdp_transformer_layer_cls_to_wrap,
+            accelerator_config = accelerator_config,
+            deepspeed = deepspeed,
+            label_smoothing_factor = label_smoothing_factor,
+            optim = optim,
+            optim_args = optim_args,
+            adafactor = adafactor,
+            group_by_length = group_by_length,
+            length_column_name = length_column_name,
+            report_to = report_to,
+            ddp_find_unused_parameters = ddp_find_unused_parameters,
+            ddp_bucket_cap_mb = ddp_bucket_cap_mb,
+            ddp_broadcast_buffers = ddp_broadcast_buffers,
+            dataloader_pin_memory = dataloader_pin_memory,
+            dataloader_persistent_workers = dataloader_persistent_workers,
+            skip_memory_metrics = skip_memory_metrics,
+            use_legacy_prediction_loop = use_legacy_prediction_loop,
+            push_to_hub = push_to_hub,
+            resume_from_checkpoint = resume_from_checkpoint,
+            hub_model_id = hub_model_id,
+            hub_strategy = hub_strategy,
+            hub_token = hub_token,
+            hub_private_repo = hub_private_repo,
+            hub_always_push = hub_always_push,
+            hub_revision = hub_revision,
+            gradient_checkpointing = gradient_checkpointing,
+            gradient_checkpointing_kwargs = gradient_checkpointing_kwargs,
+            include_inputs_for_metrics = include_inputs_for_metrics,
+            eval_do_concat_batches = eval_do_concat_batches,
+            fp16_backend = fp16_backend,
+            push_to_hub_model_id = push_to_hub_model_id,
+            push_to_hub_organization = push_to_hub_organization,
+            push_to_hub_token = push_to_hub_token,
+            mp_parameters = mp_parameters,
+            auto_find_batch_size = auto_find_batch_size,
+            full_determinism = full_determinism,
+            torchdynamo = torchdynamo,
+            ray_scope = ray_scope,
+            ddp_timeout = ddp_timeout,
+            torch_compile = torch_compile,
+            torch_compile_backend = torch_compile_backend,
+            torch_compile_mode = torch_compile_mode,
+            include_tokens_per_second = include_tokens_per_second,
+            include_num_input_tokens_seen = include_num_input_tokens_seen,
+            neftune_noise_alpha = neftune_noise_alpha,
+            optim_target_modules = optim_target_modules,
+            batch_eval_metrics = batch_eval_metrics,
+            eval_on_start = eval_on_start,
+            use_liger_kernel = use_liger_kernel,
+            liger_kernel_config = liger_kernel_config,
+            eval_use_gather_object = eval_use_gather_object,
+            average_tokens_across_devices = average_tokens_across_devices,
+            max_length = max_length,
+            max_prompt_length = max_prompt_length,
+            max_completion_length = max_completion_length,
+            beta = beta,
+            disable_dropout = disable_dropout,
+            label_pad_token_id = label_pad_token_id,
+            padding_value = padding_value,
+            truncation_mode = truncation_mode,
+            generate_during_eval = generate_during_eval,
+            is_encoder_decoder = is_encoder_decoder,
+            model_init_kwargs = model_init_kwargs,
+            dataset_num_proc = dataset_num_proc,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        self.max_seq_length = max_seq_length
+pass
+
+class _UnslothORPOTrainer(Trainer):
+    r""""""
+
+    _tag_names = ["trl", "orpo"]
+
+    def __init__(
+        self,
+        model: Optional[Union[PreTrainedModel, nn.Module, str]] = None,
+        args: Optional[ORPOConfig] = None,
+        data_collator: Optional[DataCollator] = None,
+        train_dataset: Optional[Dataset] = None,
+        eval_dataset: Optional[Union[Dataset, dict[str, Dataset]]] = None,
+        processing_class: Optional[
+            Union[PreTrainedTokenizerBase, BaseImageProcessor, FeatureExtractionMixin, ProcessorMixin]
+        ] = None,
+        model_init: Optional[Callable[[], PreTrainedModel]] = None,
+        callbacks: Optional[list[TrainerCallback]] = None,
+        optimizers: tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR] = (None, None),
+        preprocess_logits_for_metrics: Optional[Callable[[torch.Tensor, torch.Tensor], torch.Tensor]] = None,
+        peft_config: Optional[dict] = None,
+        compute_metrics: Optional[Callable[[EvalLoopOutput], dict]] = None,
+    ):
+        if args.model_init_kwargs is None:
+            model_init_kwargs = {}
+        elif not isinstance(model, str):
+            raise ValueError("You passed model_kwargs to the ORPOTrainer. But your model is already instantiated.")
+        else:
+            model_init_kwargs = args.model_init_kwargs
+            torch_dtype = model_init_kwargs.get("torch_dtype")
+            if torch_dtype is not None:
+                # Convert to `torch.dtype` if an str is passed
+                if isinstance(torch_dtype, str) and torch_dtype != "auto":
+                    torch_dtype = getattr(torch, torch_dtype)
+                if torch_dtype != "auto" and not isinstance(torch_dtype, torch.dtype):
+                    raise ValueError(
+                        f"Invalid `torch_dtype` passed to the ORPOConfig. Expected a string with either `torch.dtype` or 'auto', but got {torch_dtype}."
+                    )
+                model_init_kwargs["torch_dtype"] = torch_dtype
+
+        if isinstance(model, str):
+            model = AutoModelForCausalLM.from_pretrained(model, **model_init_kwargs)
+
+        # Initialize this variable to False. This helps tracking the case when `peft_module_casting_to_bf16`
+        # has been called in order to properly call autocast if needed.
+        self._peft_has_been_casted_to_bf16 = False
+
+        if not is_peft_available() and peft_config is not None:
+            raise ValueError(
+                "PEFT is not installed and you passed a `peft_config` in the trainer's kwargs, please install it to use the PEFT models"
+            )
+        elif is_peft_available() and peft_config is not None:
+            # if model is a peft model and we have a peft_config, we merge and unload it first
+            if isinstance(model, PeftModel):
+                model = model.merge_and_unload()
+
+            if getattr(model, "is_loaded_in_8bit", False) or getattr(model, "is_loaded_in_4bit", False):
+                _support_gc_kwargs = hasattr(
+                    args, "gradient_checkpointing_kwargs"
+                ) and "gradient_checkpointing_kwargs" in list(
+                    inspect.signature(prepare_model_for_kbit_training).parameters
+                )
+
+                prepare_model_kwargs = {"use_gradient_checkpointing": args.gradient_checkpointing}
+
+                if _support_gc_kwargs:
+                    prepare_model_kwargs["gradient_checkpointing_kwargs"] = args.gradient_checkpointing_kwargs
+
+                model = prepare_model_for_kbit_training(model, **prepare_model_kwargs)
+            elif args.gradient_checkpointing:
+                # For backward compatibility with older versions of transformers
+                if hasattr(model, "enable_input_require_grads"):
+                    model.enable_input_require_grads()
+                else:
+
+                    def make_inputs_require_grad(module, input, output):
+                        output.requires_grad_(True)
+
+                    model.get_input_embeddings().register_forward_hook(make_inputs_require_grad)
+
+            # get peft model with the given config
+            model = model
+            if args.bf16 and getattr(model, "is_loaded_in_4bit", False):
+                peft_module_casting_to_bf16(model)
+                # If args.bf16 we need to explicitly call `generate` with torch amp autocast context manager
+                self._peft_has_been_casted_to_bf16 = True
+
+        # For models that use gradient_checkpointing, we need to attach a hook that enables input
+        # to explicitly have `requires_grad=True`, otherwise training will either silently
+        # fail or completely fail.
+        elif args.gradient_checkpointing:
+            # For backward compatibility with older versions of transformers
+            if hasattr(model, "enable_input_require_grads"):
+                model.enable_input_require_grads()
+            else:
+
+                def make_inputs_require_grad(module, input, output):
+                    output.requires_grad_(True)
+
+                model.get_input_embeddings().register_forward_hook(make_inputs_require_grad)
+
+        if args.generate_during_eval and not (is_wandb_available() or is_comet_available()):
+            raise ValueError(
+                "`generate_during_eval=True` requires Weights and Biases or Comet to be installed."
+                " Please install `wandb` or `comet-ml` to resolve."
+            )
+
+        if model is not None:
+            self.is_encoder_decoder = model.config.is_encoder_decoder
+        elif args.is_encoder_decoder is None:
+            raise ValueError("When no model is provided, you need to pass the parameter is_encoder_decoder.")
+        else:
+            self.is_encoder_decoder = args.is_encoder_decoder
+
+        if self.is_encoder_decoder:
+            self.decoder_start_token_id = model.config.decoder_start_token_id
+            self.pad_token_id = model.config.pad_token_id
+
+        if processing_class is None:
+            raise ValueError("processing_class must be specified to tokenize a ORPO dataset.")
+        if args.max_length is None:
+            warnings.warn(
+                "`max_length` is not set in the ORPOConfig's init"
+                " it will default to `512` by default, but you should do it yourself in the future.",
+                UserWarning,
+            )
+            max_length = 512
+        else:
+            max_length = args.max_length
+        if args.max_prompt_length is None:
+            warnings.warn(
+                "`max_prompt_length` is not set in the ORPOConfig's init"
+                " it will default to `128` by default, but you should do it yourself in the future.",
+                UserWarning,
+            )
+            max_prompt_length = 128
+        else:
+            max_prompt_length = args.max_prompt_length
+
+        if args.max_completion_length is None and self.is_encoder_decoder:
+            warnings.warn(
+                "When using an encoder decoder architecture, you should set `max_completion_length` in the ORPOConfig's init"
+                " it will default to `128` by default, but you should do it yourself in the future.",
+                UserWarning,
+            )
+            self.max_completion_length = 128
+        else:
+            self.max_completion_length = args.max_completion_length
+
+        if data_collator is None:
+            data_collator = DPODataCollatorWithPadding(
+                pad_token_id=processing_class.pad_token_id,
+                label_pad_token_id=args.label_pad_token_id,
+                is_encoder_decoder=self.is_encoder_decoder,
+            )
+
+            if args.remove_unused_columns:
+                args.remove_unused_columns = False
+                # warn users
+                warnings.warn(
+                    "When using DPODataCollatorWithPadding, you should set `remove_unused_columns=False` in your TrainingArguments"
+                    " we have set it for you, but you should do it yourself in the future.",
+                    UserWarning,
+                )
+
+            self.use_dpo_data_collator = True
+        else:
+            self.use_dpo_data_collator = False
+
+        # Disable dropout in the model and reference model
+        if args.disable_dropout:
+            disable_dropout_in_model(model)
+
+        self.max_length = max_length
+        self.generate_during_eval = args.generate_during_eval
+        self.label_pad_token_id = args.label_pad_token_id
+        self.padding_value = args.padding_value if args.padding_value is not None else processing_class.pad_token_id
+        self.max_prompt_length = max_prompt_length
+        self.truncation_mode = args.truncation_mode
+        self.processing_class = processing_class
+
+        self.beta = args.beta
+        self.aux_loss_enabled = getattr(model.config, "output_router_logits", False)
+        self.aux_loss_coef = getattr(model.config, "router_aux_loss_coef", 0.0)
+        if self.aux_loss_enabled and self.aux_loss_coef == 0.0:
+            warnings.warn(
+                "You set `output_router_logits` to `True` in the model config, but `router_aux_loss_coef` is set to "
+                "`0.0`, meaning the auxiliary loss will not be used. Either set `router_aux_loss_coef` to a value "
+                "greater than `0.0`, or set `output_router_logits` to `False` if you don't want to use the auxiliary "
+                "loss.",
+                UserWarning,
+            )
+
+        self._stored_metrics = defaultdict(lambda: defaultdict(list))
+
+        # The trainer estimates the number of FLOPs [floating-point operations] using the number of elements in the
+        # input tensor associated with the key "input_ids". However, in ORPO, the sampled data does not include the
+        # "input_ids" key. Instead, the available keys are "prompt_input_ids", "chosen_input_ids", and
+        # "rejected_input_ids". As a result, the trainer issues the warning: "Could not estimate the number of tokens
+        # of the input, floating-point operations will not be computed." To suppress this warning, we set the
+        # "estimate_tokens" key in the model's "warnings_issued" dictionary to True. This acts as a flag to indicate
+        # that the warning has already been issued.
+        model.warnings_issued["estimate_tokens"] = True
+
+        # Compute that only on the main process for faster data processing.
+        # see: https://github.com/huggingface/trl/pull/1255
+        with PartialState().main_process_first():
+            # Extract the prompt if needed, and apply the chat template if needed
+            train_dataset = train_dataset.map(maybe_extract_prompt, num_proc=args.dataset_num_proc)
+            train_dataset = train_dataset.map(
+                maybe_apply_chat_template, fn_kwargs={"tokenizer": processing_class}, num_proc=args.dataset_num_proc
+            )
+            train_dataset = train_dataset.map(self.tokenize_row, num_proc=args.dataset_num_proc)
+            if eval_dataset is not None:
+                eval_dataset = eval_dataset.map(maybe_extract_prompt, num_proc=args.dataset_num_proc)
+                eval_dataset = eval_dataset.map(
+                    maybe_apply_chat_template,
+                    fn_kwargs={"tokenizer": processing_class},
+                    num_proc=args.dataset_num_proc,
+                )
+                eval_dataset = eval_dataset.map(self.tokenize_row, num_proc=args.dataset_num_proc)
+
+        super().__init__(
+            model=model,
+            args=args,
+            data_collator=data_collator,
+            train_dataset=train_dataset,
+            eval_dataset=eval_dataset,
+            processing_class=processing_class,
+            model_init=model_init,
+            compute_metrics=compute_metrics,
+            callbacks=callbacks,
+            optimizers=optimizers,
+            preprocess_logits_for_metrics=preprocess_logits_for_metrics,
+        )
+
+        # Gradient accumulation requires scaled loss. Normally, loss scaling in the parent class depends on whether the
+        # model accepts loss-related kwargs. Since we compute our own loss, this check is irrelevant. We set
+        # self.model_accepts_loss_kwargs to False to enable scaling.
+        self.model_accepts_loss_kwargs = False
+
+        # Add tags for models that have been loaded with the correct transformers version
+        if hasattr(self.model, "add_model_tags"):
+            self.model.add_model_tags(self._tag_names)
+
+        if not hasattr(self, "accelerator"):
+            raise AttributeError(
+                "Your `Trainer` does not have an `accelerator` object. Consider upgrading `transformers`."
+            )
+
+    def build_tokenized_answer(self, prompt, answer):
+        """
+        Llama tokenizer does satisfy `enc(a + b) = enc(a) + enc(b)`. It does ensure `enc(a + b) = enc(a) + enc(a +
+        b)[len(enc(a)):]`. Reference:
+            https://github.com/EleutherAI/lm-evaluation-harness/pull/531#issuecomment-1595586257
+        """
+
+        full_tokenized = self.processing_class(prompt + answer, add_special_tokens=False)
+        prompt_input_ids = self.processing_class(prompt, add_special_tokens=False)["input_ids"]
+
+        answer_input_ids = full_tokenized["input_ids"][len(prompt_input_ids) :]
+        answer_attention_mask = full_tokenized["attention_mask"][len(prompt_input_ids) :]
+
+        # Concat tokens to form `enc(a) + enc(a + b)[len(enc(a)):]`
+        full_concat_input_ids = np.concatenate([prompt_input_ids, answer_input_ids])
+
+        # Prepare input tokens for token by token comparison
+        full_input_ids = np.array(full_tokenized["input_ids"])
+
+        if len(full_input_ids) != len(full_concat_input_ids):
+            raise ValueError("Prompt input ids and answer input ids should have the same length.")
+
+        # On some tokenizers, like Llama-2 tokenizer, there are occasions where tokens
+        # can be merged together when tokenizing prompt+answer. This could result
+        # on the last token from the prompt being different when tokenized on its own
+        # vs when done as prompt+answer.
+        response_token_ids_start_idx = len(prompt_input_ids)
+
+        # If tokenized prompt is different than both prompt+answer, then it means the
+        # last token has changed due to merging.
+        if prompt_input_ids != full_tokenized["input_ids"][:response_token_ids_start_idx]:
+            response_token_ids_start_idx -= 1
+
+        prompt_input_ids = full_tokenized["input_ids"][:response_token_ids_start_idx]
+        prompt_attention_mask = full_tokenized["attention_mask"][:response_token_ids_start_idx]
+
+        if len(prompt_input_ids) != len(prompt_attention_mask):
+            raise ValueError("Prompt input ids and attention mask should have the same length.")
+
+        answer_input_ids = full_tokenized["input_ids"][response_token_ids_start_idx:]
+        answer_attention_mask = full_tokenized["attention_mask"][response_token_ids_start_idx:]
+
+        return dict(
+            prompt_input_ids=prompt_input_ids,
+            prompt_attention_mask=prompt_attention_mask,
+            input_ids=answer_input_ids,
+            attention_mask=answer_attention_mask,
+        )
+
+    def tokenize_row(self, feature, model: Optional[Union[PreTrainedModel, nn.Module]] = None) -> dict:
+        """Tokenize a single row from a ORPO specific dataset.
+
+        At this stage, we don't convert to PyTorch tensors yet; we just handle the truncation in case the prompt +
+        chosen or prompt + rejected responses is/are too long. First we truncate the prompt; if we're still too long,
+        we truncate the chosen/rejected.
+
+        We also create the labels for the chosen/rejected responses, which are of length equal to the sum of the length
+        of the prompt and the chosen/rejected response, with label_pad_token_id for the prompt tokens.
+        """
+        batch = {}
+        prompt = feature["prompt"]
+        chosen = feature["chosen"]
+        rejected = feature["rejected"]
+
+        if not self.is_encoder_decoder:
+            # Check issues below for more details
+            #  1. https://github.com/huggingface/trl/issues/907
+            #  2. https://github.com/EleutherAI/lm-evaluation-harness/pull/531#issuecomment-1595586257
+            #  3. https://github.com/LianjiaTech/BELLE/issues/337
+
+            if not isinstance(prompt, str):
+                raise ValueError(f"prompt should be an str but got {type(prompt)}")
+            prompt_tokens = self.processing_class(prompt, add_special_tokens=False)
+            prompt_tokens = {f"prompt_{k}": v for k, v in prompt_tokens.items()}
+
+            if not isinstance(chosen, str):
+                raise ValueError(f"chosen should be an str but got {type(chosen)}")
+            chosen_tokens = self.build_tokenized_answer(prompt, chosen)
+
+            if not isinstance(rejected, str):
+                raise ValueError(f"rejected should be an str but got {type(rejected)}")
+            rejected_tokens = self.build_tokenized_answer(prompt, rejected)
+
+            # Last prompt token might get merged by tokenizer and
+            # it should not be included for generation if that happens
+            prompt_len_input_ids = len(prompt_tokens["prompt_input_ids"])
+
+            chosen_prompt_len_input_ids = len(chosen_tokens["prompt_input_ids"])
+            rejected_prompt_len_input_ids = len(rejected_tokens["prompt_input_ids"])
+            prompt_len_input_ids = min(chosen_prompt_len_input_ids, rejected_prompt_len_input_ids)
+
+            for k, v in prompt_tokens.items():
+                prompt_tokens[k] = v[:prompt_len_input_ids]
+
+            # Make sure prompts only have one different token at most an
+            # and length only differs by 1 at most
+            num_diff_tokens = sum(
+                [a != b for a, b in zip(chosen_tokens["prompt_input_ids"], rejected_tokens["prompt_input_ids"])]
+            )
+            num_diff_len = abs(chosen_prompt_len_input_ids - rejected_prompt_len_input_ids)
+            if num_diff_tokens > 1 or num_diff_len > 1:
+                raise ValueError(
+                    "Chosen and rejected prompt_input_ids might only differ on the "
+                    "last token due to tokenizer merge ops."
+                )
+
+            # add BOS token to head of prompt. Avoid adding if it's already there
+            prompt_tokens, chosen_tokens, rejected_tokens = add_bos_token_if_needed(
+                self.processing_class.bos_token_id,
+                prompt_len_input_ids,
+                prompt_tokens,
+                chosen_prompt_len_input_ids,
+                chosen_tokens,
+                rejected_prompt_len_input_ids,
+                rejected_tokens,
+            )
+
+            # add EOS token to end of answer. Avoid adding if it's already there
+            chosen_tokens, rejected_tokens = add_eos_token_if_needed(
+                self.processing_class.eos_token_id, chosen_tokens, rejected_tokens
+            )
+
+            longer_response_length = max(len(chosen_tokens["input_ids"]), len(rejected_tokens["input_ids"]))
+
+            # if combined sequence is too long, truncate the prompt
+            for answer_tokens in [chosen_tokens, rejected_tokens, prompt_tokens]:
+                if len(answer_tokens["prompt_input_ids"]) + longer_response_length > self.max_length:
+                    if self.truncation_mode == "keep_start":
+                        for k in ["prompt_input_ids", "prompt_attention_mask"]:
+                            answer_tokens[k] = answer_tokens[k][: self.max_prompt_length]
+                    elif self.truncation_mode == "keep_end":
+                        for k in ["prompt_input_ids", "prompt_attention_mask"]:
+                            answer_tokens[k] = answer_tokens[k][-self.max_prompt_length :]
+                    else:
+                        raise ValueError(f"Unknown truncation mode: {self.truncation_mode}")
+
+            # if that's still too long, truncate the response
+            for answer_tokens in [chosen_tokens, rejected_tokens]:
+                if len(answer_tokens["prompt_input_ids"]) + longer_response_length > self.max_length:
+                    for k in ["input_ids", "attention_mask"]:
+                        answer_tokens[k] = answer_tokens[k][: self.max_length - self.max_prompt_length]
+
+            # Create labels
+            chosen_sequence_tokens = {
+                k: chosen_tokens[f"prompt_{k}"] + chosen_tokens[k] for k in ["input_ids", "attention_mask"]
+            }
+            rejected_sequence_tokens = {
+                k: rejected_tokens[f"prompt_{k}"] + rejected_tokens[k] for k in ["input_ids", "attention_mask"]
+            }
+            chosen_sequence_tokens["labels"] = chosen_sequence_tokens["input_ids"][:]
+            chosen_sequence_tokens["labels"][: len(chosen_tokens["prompt_input_ids"])] = [
+                self.label_pad_token_id
+            ] * len(chosen_tokens["prompt_input_ids"])
+            rejected_sequence_tokens["labels"] = rejected_sequence_tokens["input_ids"][:]
+            rejected_sequence_tokens["labels"][: len(rejected_tokens["prompt_input_ids"])] = [
+                self.label_pad_token_id
+            ] * len(rejected_tokens["prompt_input_ids"])
+
+            for k, toks in {
+                "chosen_": chosen_sequence_tokens,
+                "rejected_": rejected_sequence_tokens,
+                "": prompt_tokens,
+            }.items():
+                for type_key, tokens in toks.items():
+                    if type_key == "token_type_ids":
+                        continue
+                    batch[f"{k}{type_key}"] = tokens
+
+        else:
+            chosen_tokens = self.processing_class(
+                chosen, truncation=True, max_length=self.max_completion_length, add_special_tokens=True
+            )
+            rejected_tokens = self.processing_class(
+                rejected, truncation=True, max_length=self.max_completion_length, add_special_tokens=True
+            )
+            prompt_tokens = self.processing_class(
+                prompt, truncation=True, max_length=self.max_prompt_length, add_special_tokens=True
+            )
+
+            batch["chosen_labels"] = chosen_tokens["input_ids"]
+            batch["rejected_labels"] = rejected_tokens["input_ids"]
+            batch["prompt_input_ids"] = prompt_tokens["input_ids"]
+            batch["prompt_attention_mask"] = prompt_tokens["attention_mask"]
+
+            if model is not None and hasattr(model, "prepare_decoder_input_ids_from_labels"):
+                batch["rejected_decoder_input_ids"] = model.prepare_decoder_input_ids_from_labels(
+                    labels=torch.tensor(batch["rejected_labels"])
+                )
+                batch["chosen_decoder_input_ids"] = model.prepare_decoder_input_ids_from_labels(
+                    labels=torch.tensor(batch["chosen_labels"])
+                )
+
+        if is_torch_xla_available():
+            # Pad the sequences to global max_length to avoid TorchXLA recompilation
+            for k in batch:
+                if "labels" in k or self.is_encoder_decoder:
+                    pad_value = self.label_pad_token_id
+                elif k.endswith("_input_ids"):
+                    pad_value = self.padding_value
+                elif k.endswith("_attention_mask"):
+                    pad_value = 0
+                batch[k] = batch[k] + [pad_value] * (self.max_length - len(batch[k]))
+        return batch
+
+    @staticmethod
+    def concatenated_inputs(
+        batch: dict[str, Union[list, torch.LongTensor]],
+        is_encoder_decoder: bool = False,
+        label_pad_token_id: int = -100,
+        padding_value: int = 0,
+        device: Optional[torch.device] = None,
+    ) -> dict[str, torch.LongTensor]:
+        """Concatenate the chosen and rejected inputs into a single tensor.
+
+        Args:
+            batch:
+                A batch of data. Must contain the keys 'chosen_input_ids' and 'rejected_input_ids', which are tensors
+                of shape (batch_size, sequence_length).
+            is_encoder_decoder:
+                Whether the model is an encoder-decoder model.
+            label_pad_token_id:
+                The label pad token id.
+            padding_value:
+                The padding value to use for the concatenated inputs_ids.
+            device:
+                The device for the concatenated inputs.
+
+        Returns:
+            A dictionary containing the concatenated inputs under the key 'concatenated_input_ids'.
+        """
+        concatenated_batch = {}
+
+        if is_encoder_decoder:
+            max_length = max(batch["chosen_labels"].shape[1], batch["rejected_labels"].shape[1])
+        else:
+            max_length = max(batch["chosen_input_ids"].shape[1], batch["rejected_input_ids"].shape[1])
+
+        for k in batch:
+            if k.startswith("chosen") and isinstance(batch[k], torch.Tensor):
+                if "labels" in k or is_encoder_decoder:
+                    pad_value = label_pad_token_id
+                elif k.endswith("_input_ids"):
+                    pad_value = padding_value
+                elif k.endswith("_attention_mask"):
+                    pad_value = 0
+                concatenated_key = k.replace("chosen", "concatenated")
+                concatenated_batch[concatenated_key] = pad_to_length(batch[k], max_length, pad_value=pad_value)
+        for k in batch:
+            if k.startswith("rejected") and isinstance(batch[k], torch.Tensor):
+                if "labels" in k or is_encoder_decoder:
+                    pad_value = label_pad_token_id
+                elif k.endswith("_input_ids"):
+                    pad_value = padding_value
+                elif k.endswith("_attention_mask"):
+                    pad_value = 0
+                concatenated_key = k.replace("rejected", "concatenated")
+                concatenated_batch[concatenated_key] = torch.cat(
+                    (
+                        concatenated_batch[concatenated_key],
+                        pad_to_length(batch[k], max_length, pad_value=pad_value),
+                    ),
+                    dim=0,
+                ).to(device=device)
+
+        if is_encoder_decoder:
+            concatenated_batch["concatenated_input_ids"] = batch["prompt_input_ids"].repeat(2, 1).to(device=device)
+            concatenated_batch["concatenated_attention_mask"] = (
+                batch["prompt_attention_mask"].repeat(2, 1).to(device=device)
+            )
+
+        return concatenated_batch
+
+    def odds_ratio_loss(
+        self,
+        policy_chosen_logps: torch.FloatTensor,
+        policy_rejected_logps: torch.FloatTensor,
+    ) -> tuple[torch.FloatTensor, torch.FloatTensor, torch.FloatTensor, torch.FloatTensor, torch.FloatTensor]:
+        """Compute ORPO's odds ratio (OR) loss for a batch of policy and reference model log probabilities.
+
+        Args:
+            policy_chosen_logps:
+                Log probabilities of the policy model for the chosen responses. Shape: (batch_size,)
+            policy_rejected_logps:
+                Log probabilities of the policy model for the rejected responses. Shape: (batch_size,)
+
+        Returns:
+            A tuple of three tensors: (losses, chosen_rewards, rejected_rewards). The losses tensor contains the ORPO
+            loss for each example in the batch. The chosen_rewards and rejected_rewards tensors contain the rewards for
+            the chosen and rejected responses, respectively. The log odds ratio of the chosen responses over the
+            rejected responses ratio for logging purposes. The `log(sigmoid(log_odds_chosen))` for logging purposes.
+        """
+
+        # Derived from Eqs. (4) and (7) from https://huggingface.co/papers/2403.07691 by using log identities and exp(log(P(y|x)) = P(y|x)
+        log_odds = (policy_chosen_logps - policy_rejected_logps) - (
+            torch.log1p(-torch.exp(policy_chosen_logps)) - torch.log1p(-torch.exp(policy_rejected_logps))
+        )
+        ratio = F.logsigmoid(log_odds)
+        losses = self.beta * ratio
+
+        chosen_rewards = self.beta * (policy_chosen_logps.to(self.accelerator.device)).detach()
+        rejected_rewards = self.beta * (policy_rejected_logps.to(self.accelerator.device)).detach()
+
+        return losses, chosen_rewards, rejected_rewards, torch.mean(ratio), torch.mean(log_odds)
+
+    @staticmethod
+    def get_batch_logps(
+        logits: torch.FloatTensor,
+        labels: torch.LongTensor,
+        average_log_prob: bool = False,
+        label_pad_token_id: int = -100,
+        is_encoder_decoder: bool = False,
+    ) -> torch.FloatTensor:
+        """Compute the log probabilities of the given labels under the given logits.
+
+        Args:
+            logits: Logits of the model (unnormalized). Shape: (batch_size, sequence_length, vocab_size)
+            labels:
+                Labels for which to compute the log probabilities. Label tokens with a value of label_pad_token_id are
+                ignored. Shape: (batch_size, sequence_length)
+            average_log_prob:
+                If True, return the average log probability per (non-masked) token. Otherwise, return the sum of the
+                log probabilities of the (non-masked) tokens.
+            label_pad_token_id: The label pad token id.
+            is_encoder_decoder: Whether the model is an encoder-decoder model.
+
+        Returns:
+            A tensor of shape (batch_size,) containing the average/sum log probabilities of the given labels under the
+            given logits.
+        """
+        if logits.shape[:-1] != labels.shape:
+            raise ValueError("Logits (batch and sequence length dim) and labels must have the same shape.")
+
+        if not is_encoder_decoder:
+            labels = labels[:, 1:].clone()
+            logits = logits[:, :-1, :]
+        loss_mask = labels != label_pad_token_id
+
+        # dummy token; we'll ignore the losses on these tokens later
+        labels = torch.where(labels == label_pad_token_id, 0, labels)
+
+        per_token_logps = selective_log_softmax(logits, labels)
+
+        if average_log_prob:
+            return (per_token_logps * loss_mask).sum(-1) / loss_mask.sum(-1)
+        else:
+            return (per_token_logps * loss_mask).sum(-1)
+
+    def concatenated_forward(
+        self, model: nn.Module, batch: dict[str, Union[list, torch.LongTensor]]
+    ) -> tuple[torch.FloatTensor, torch.FloatTensor, torch.FloatTensor, torch.FloatTensor]:
+        """Run the given model on the given batch of inputs, concatenating the chosen and rejected inputs together.
+
+        We do this to avoid doing two forward passes, because it's faster for FSDP.
+        """
+        concatenated_batch = self.concatenated_inputs(
+            batch,
+            is_encoder_decoder=self.is_encoder_decoder,
+            label_pad_token_id=self.label_pad_token_id,
+            padding_value=self.padding_value,
+            device=self.accelerator.device,
+        )
+        len_chosen = batch["chosen_labels"].shape[0]
+
+        model_kwargs = (
+            {
+                "decoder_input_ids": self._shift_right(concatenated_batch["concatenated_labels"]),
+            }
+            if self.is_encoder_decoder
+            else {}
+        )
+
+        if self.aux_loss_enabled:
+            model_kwargs["output_router_logits"] = True
+
+        outputs = model(
+            concatenated_batch["concatenated_input_ids"],
+            attention_mask=concatenated_batch["concatenated_attention_mask"],
+            use_cache=False,
+            **model_kwargs,
+        )
+        all_logits = outputs.logits
+
+        def cross_entropy_loss(logits, labels):
+            if not self.is_encoder_decoder:
+                # Shift so that tokens < n predict n
+                logits = logits[..., :-1, :].contiguous()
+                labels = labels[..., 1:].contiguous()
+            # Flatten the tokens
+            loss_fct = nn.CrossEntropyLoss()
+            logits = logits.view(-1, logits.shape[-1])
+            labels = labels.view(-1)
+            # Enable model parallelism
+            labels = labels.to(logits.device)
+            loss = loss_fct(logits, labels)
+            return loss
+
+        if self.is_encoder_decoder:
+            labels = concatenated_batch["concatenated_labels"].clone()
+        else:
+            labels = concatenated_batch["concatenated_input_ids"].clone()
+            attention_mask = concatenated_batch["concatenated_attention_mask"]
+            labels = torch.where(attention_mask == 1, labels, self.label_pad_token_id)
+        # orpo chosen nll loss is computed over the full prompt and response
+        chosen_nll_loss = cross_entropy_loss(all_logits[:len_chosen], labels[:len_chosen])
+
+        all_logps = self.get_batch_logps(
+            all_logits,
+            concatenated_batch["concatenated_labels"],
+            average_log_prob=True,
+            is_encoder_decoder=self.is_encoder_decoder,
+            label_pad_token_id=self.label_pad_token_id,
+        )
+
+        chosen_logps = all_logps[:len_chosen]
+        rejected_logps = all_logps[len_chosen:]
+
+        if not self.is_encoder_decoder:
+            chosen_logits = all_logits[:len_chosen, :-1, :]
+            rejected_logits = all_logits[len_chosen:, :-1, :]
+        else:
+            chosen_logits = all_logits[:len_chosen]
+            rejected_logits = all_logits[len_chosen:]
+
+        if self.aux_loss_enabled:
+            return (chosen_logps, rejected_logps, chosen_logits, rejected_logits, chosen_nll_loss, outputs.aux_loss)
+
+        return (chosen_logps, rejected_logps, chosen_logits, rejected_logits, chosen_nll_loss)
+
+    def get_batch_loss_metrics(
+        self,
+        model,
+        batch: dict[str, Union[list, torch.LongTensor]],
+        train_eval: Literal["train", "eval"] = "train",
+    ):
+        """Compute the ORPO loss and other metrics for the given batch of inputs for train or test."""
+        metrics = {}
+
+        forward_output = self.concatenated_forward(model, batch)
+        (
+            policy_chosen_logps,
+            policy_rejected_logps,
+            policy_chosen_logits,
+            policy_rejected_logits,
+            policy_nll_loss,
+        ) = forward_output[:5]
+        if self.aux_loss_enabled:
+            aux_loss = forward_output[5]
+
+        losses, chosen_rewards, rejected_rewards, log_odds_ratio, log_odds_chosen = self.odds_ratio_loss(
+            policy_chosen_logps, policy_rejected_logps
+        )
+        # full ORPO loss
+        loss = policy_nll_loss - losses.mean()
+
+        reward_accuracies = (chosen_rewards > rejected_rewards).float()
+
+        prefix = "eval_" if train_eval == "eval" else ""
+        metrics[f"{prefix}rewards/chosen"] = self.accelerator.gather_for_metrics(chosen_rewards).mean()
+        metrics[f"{prefix}rewards/rejected"] = self.accelerator.gather_for_metrics(rejected_rewards).mean()
+        metrics[f"{prefix}rewards/accuracies"] = self.accelerator.gather_for_metrics(reward_accuracies).mean()
+        metrics[f"{prefix}rewards/margins"] = self.accelerator.gather_for_metrics(
+            chosen_rewards - rejected_rewards
+        ).mean()
+        metrics[f"{prefix}logps/rejected"] = self.accelerator.gather_for_metrics(policy_rejected_logps).detach().mean()
+        metrics[f"{prefix}logps/chosen"] = self.accelerator.gather_for_metrics(policy_chosen_logps).detach().mean()
+        metrics[f"{prefix}logits/rejected"] = self.accelerator.gather_for_metrics(
+            policy_rejected_logits.detach().mean()
+        ).mean()
+        metrics[f"{prefix}logits/chosen"] = self.accelerator.gather_for_metrics(
+            policy_chosen_logits.detach().mean()
+        ).mean()
+        metrics[f"{prefix}nll_loss"] = self.accelerator.gather_for_metrics(policy_nll_loss).detach().mean()
+        metrics[f"{prefix}log_odds_ratio"] = self.accelerator.gather_for_metrics(log_odds_ratio).detach().mean()
+        metrics[f"{prefix}log_odds_chosen"] = self.accelerator.gather_for_metrics(log_odds_chosen).detach().mean()
+        if is_torch_xla_available():
+            xm.mark_step()  # needed because .item() calls
+        for k, v in metrics.items():
+            metrics[k] = v.item()
+        if self.aux_loss_enabled:
+            loss += self.aux_loss_coef * aux_loss
+
+        return loss, metrics
+
+    def compute_loss(
+        self,
+        model: Union[PreTrainedModel, nn.Module],
+        inputs: dict[str, Union[torch.Tensor, Any]],
+        return_outputs=False,
+        num_items_in_batch=None,
+    ) -> Union[torch.Tensor, tuple[torch.Tensor, dict[str, torch.Tensor]]]:
+        compute_loss_context_manager = (
+            autocast(self.accelerator.device.type) if self._peft_has_been_casted_to_bf16 else nullcontext()
+        )
+
+        with compute_loss_context_manager:
+            loss, metrics = self.get_batch_loss_metrics(model, inputs, train_eval="train")
+
+        # Make sure to move the loss to the device the original accumulating loss is at back in the `Trainer` class:
+        loss = loss.to(self.args.device)
+
+        # force log the metrics
+        self.store_metrics(metrics, train_eval="train")
+
+        if return_outputs:
+            return (loss, metrics)
+        return loss
+
+    def generate_from_model(self, model, batch: dict[str, torch.LongTensor]) -> str:
+        """Generate samples from the model and reference model for the given batch of inputs."""
+
+        # If one uses `generate_during_eval` with peft + bf16, we need to explicitly call generate with
+        # the torch amp context manager as some hidden states are silently casted to full precision.
+        generate_context_manager = (
+            autocast(self.accelerator.device.type) if self._peft_has_been_casted_to_bf16 else nullcontext()
+        )
+
+        with generate_context_manager:
+            policy_output = model.generate(
+                input_ids=batch["prompt_input_ids"],
+                attention_mask=batch["prompt_attention_mask"],
+                max_length=self.max_length,
+                do_sample=True,
+                pad_token_id=self.processing_class.pad_token_id,
+            )
+
+        policy_output = pad_to_length(policy_output, self.max_length, self.processing_class.pad_token_id)
+        policy_output_decoded = self.processing_class.batch_decode(policy_output, skip_special_tokens=True)
+
+        return policy_output_decoded
+
+    def prediction_step(
+        self,
+        model: Union[PreTrainedModel, nn.Module],
+        inputs: dict[str, Union[torch.Tensor, Any]],
+        prediction_loss_only: bool,
+        ignore_keys: Optional[list[str]] = None,
+    ):
+        if not self.use_dpo_data_collator:
+            warnings.warn(
+                "prediction_step is only implemented for DPODataCollatorWithPadding, and you passed a datacollator that is different than "
+                "DPODataCollatorWithPadding - you might see unexpected behavior. Alternatively, you can implement your own prediction_step method if you are using a custom data collator"
+            )
+        if ignore_keys is None:
+            if hasattr(model, "config"):
+                ignore_keys = getattr(model.config, "keys_to_ignore_at_inference", [])
+            else:
+                ignore_keys = []
+
+        prediction_context_manager = (
+            autocast(self.accelerator.device.type) if self._peft_has_been_casted_to_bf16 else nullcontext()
+        )
+
+        with torch.no_grad(), prediction_context_manager:
+            loss, metrics = self.get_batch_loss_metrics(model, inputs, train_eval="eval")
+
+        # force log the metrics
+        self.store_metrics(metrics, train_eval="eval")
+
+        if prediction_loss_only:
+            return (loss.detach(), None, None)
+
+        # logits for the chosen and rejected samples from model
+        logits_dict = {
+            "eval_logits/chosen": metrics["eval_logits/chosen"],
+            "eval_logits/rejected": metrics["eval_logits/rejected"],
+        }
+        logits = [v for k, v in logits_dict.items() if k not in ignore_keys]
+        logits = torch.tensor(logits, device=self.accelerator.device)
+        labels = torch.zeros(logits.shape[0], device=self.accelerator.device)
+
+        return (loss.detach(), logits, labels)
+
+    def store_metrics(self, metrics: dict[str, float], train_eval: Literal["train", "eval"] = "train") -> None:
+        for key, value in metrics.items():
+            self._stored_metrics[train_eval][key].append(value)
+
+    def evaluation_loop(
+        self,
+        dataloader: DataLoader,
+        description: str,
+        prediction_loss_only: Optional[bool] = None,
+        ignore_keys: Optional[list[str]] = None,
+        metric_key_prefix: str = "eval",
+    ) -> EvalLoopOutput:
+        """
+        Overriding built-in evaluation loop to store metrics for each batch. Prediction/evaluation loop, shared by
+        `Trainer.evaluate()` and `Trainer.predict()`.
+
+        Works both with or without labels.
+        """
+
+        # Sample and save to game log if requested (for one batch to save time)
+        if self.generate_during_eval:
+            # Generate random indices within the range of the total number of samples
+            num_samples = len(dataloader.dataset)
+            random_indices = random.sample(range(num_samples), k=self.args.eval_batch_size)
+
+            # Use dataloader.dataset.select to get the random batch without iterating over the DataLoader
+            random_batch_dataset = dataloader.dataset.select(random_indices)
+            random_batch = self.data_collator(random_batch_dataset)
+            random_batch = self._prepare_inputs(random_batch)
+
+            policy_output_decoded = self.generate_from_model(self.model, random_batch)
+
+            table = pd.DataFrame(
+                columns=["Prompt", "Policy"],
+                data=[
+                    [prompt, pol[len(prompt) :]] for prompt, pol in zip(random_batch["prompt"], policy_output_decoded)
+                ],
+            )
+            if "wandb" in self.args.report_to:
+                wandb.log({"game_log": wandb.Table(data=table)})
+
+            if "comet_ml" in self.args.report_to:
+                log_table_to_comet_experiment(
+                    name="game_log.csv",
+                    table=table,
+                )
+
+        # Base evaluation
+        initial_output = super().evaluation_loop(
+            dataloader, description, prediction_loss_only, ignore_keys, metric_key_prefix
+        )
+
+        return initial_output
+
+    def log(self, logs: dict[str, float], start_time: Optional[float] = None) -> None:
+        """
+        Log `logs` on the various objects watching training, including stored metrics.
+
+        Args:
+            logs (`dict[str, float]`):
+                The values to log.
+            start_time (`float` or `None`, *optional*, defaults to `None`):
+                Start time of the training.
+        """
+        # logs either has 'loss' or 'eval_loss'
+        train_eval = "train" if "loss" in logs else "eval"
+        # Add averaged stored metrics to logs
+        for key, metrics in self._stored_metrics[train_eval].items():
+            logs[key] = torch.tensor(metrics).mean().item()
+        del self._stored_metrics[train_eval]
+        return super().log(logs, start_time)
+
+    def _shift_right(self, input_ids):
+        if self.decoder_start_token_id is None:
+            raise ValueError(
+                "model.config.decoder_start_token_id has to be defined. It is usually set to the pad_token_id."
+            )
+
+        # shift inputs to the right
+        if is_torch_fx_proxy(input_ids):
+            # Item assignment is not supported natively for proxies.
+            shifted_input_ids = torch.full(input_ids.shape[:-1] + (1,), self.decoder_start_token_id)
+            shifted_input_ids = torch.cat([shifted_input_ids, input_ids[..., :-1]], dim=-1)
+        else:
+            shifted_input_ids = input_ids.new_zeros(input_ids.shape)
+            shifted_input_ids[..., 1:] = input_ids[..., :-1].clone()
+            shifted_input_ids[..., 0] = self.decoder_start_token_id
+
+        if self.pad_token_id is None:
+            raise ValueError("model.config.pad_token_id has to be defined.")
+        # replace possible -100 values in labels by `pad_token_id`
+        shifted_input_ids.masked_fill_(shifted_input_ids == -100, self.pad_token_id)
+
+        return shifted_input_ids
+
+    # Ensure the model card is saved along with the checkpoint
+    def _save_checkpoint(self, model, trial):
+        if self.args.hub_model_id is None:
+            model_name = Path(self.args.output_dir).name
+        else:
+            model_name = self.args.hub_model_id.split("/")[-1]
+        self.create_model_card(model_name=model_name)
+        super()._save_checkpoint(model, trial)
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        citation = textwrap.dedent("""\
+        @article{hong2024orpo,
+            title        = {{ORPO: Monolithic Preference Optimization without Reference Model}},
+            author       = {Jiwoo Hong and Noah Lee and James Thorne},
+            year         = 2024,
+            eprint       = {arXiv:2403.07691}
+        }""")
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="ORPO",
+            trainer_citation=citation,
+            paper_title="ORPO: Monolithic Preference Optimization without Reference Model",
+            paper_id="2403.07691",
+        )
+
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothORPOTrainer(_UnslothORPOTrainer):
+    """
+    
+    Initialize ORPOTrainer.
+
+    Args:
+        model (`transformers.PreTrainedModel`):
+            The model to train, preferably an `AutoModelForSequenceClassification`.
+        args (`ORPOConfig`):
+            The ORPO config arguments to use for training.
+        data_collator (`transformers.DataCollator`):
+            The data collator to use for training. If None is specified, the default data collator
+            (`DPODataCollatorWithPadding`) will be used which will pad the sequences to the maximum length of the
+            sequences in the batch, given a dataset of paired sequences.
+        train_dataset (`datasets.Dataset`):
+            The dataset to use for training.
+        eval_dataset (`datasets.Dataset`):
+            The dataset to use for evaluation.
+        processing_class ([`~transformers.PreTrainedTokenizerBase`], [`~transformers.BaseImageProcessor`], [`~transformers.FeatureExtractionMixin`] or [`~transformers.ProcessorMixin`], *optional*, defaults to `None`):
+            Processing class used to process the data. If provided, will be used to automatically process the inputs
+            for the model, and it will be saved along the model to make it easier to rerun an interrupted training or
+            reuse the fine-tuned model.
+        model_init (`Callable[[], transformers.PreTrainedModel]`):
+            The model initializer to use for training. If None is specified, the default model initializer will be
+            used.
+        callbacks (`list[transformers.TrainerCallback]`):
+            The callbacks to use for training.
+        optimizers (`tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR]`):
+            The optimizer and scheduler to use for training.
+        preprocess_logits_for_metrics (`Callable[[torch.Tensor, torch.Tensor], torch.Tensor]`):
+            The function to use to preprocess the logits before computing the metrics.
+        peft_config (`dict`, defaults to `None`):
+            The PEFT configuration to use for training. If you pass a PEFT configuration, the model will be wrapped in
+            a PEFT model.
+        compute_metrics (`Callable[[EvalPrediction], dict]`, *optional*):
+            The function to use to compute the metrics. Must take a `EvalPrediction` and return a dictionary string to
+            metric values.
+    
+    """
+    def __init__(
+        self,
+        model = None,
+        args = None,
+        data_collator = None,
+        train_dataset = None,
+        eval_dataset = None,
+        processing_class = None,
+        model_init = None,
+        callbacks = None,
+        preprocess_logits_for_metrics = None,
+        peft_config = None,
+        compute_metrics = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothORPOConfig()
+        use_bf16 = getattr(args, 'bf16', False)
+        if type(use_bf16) is not bool: use_bf16 = False
+        use_fp16 = getattr(args, 'fp16', False)
+        if type(use_fp16) is not bool: use_fp16 = False
+        force_float32 = False
+        if os.environ.get('UNSLOTH_FORCE_FLOAT32', '0') == '1':
+            print('Unsloth: Switching to float32 training since model cannot work with float16')
+            force_float32 = True
+        mixed_precision_dtype = os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32')
+        dtype = getattr(model.config, 'torch_dtype', None)
+        if dtype is None: dtype = model.get_input_embeddings().dtype
+        from unsloth_zoo.utils import _get_dtype
+        dtype = _get_dtype(dtype)
+        float16 = dtype == torch.float16
+        if not force_float32 and (float16 and use_bf16): raise TypeError('Unsloth: Model is in float16 precision but you want to use bfloat16 precision. Set fp16 to `True` and bf16 to `False`')
+        if not force_float32 and (not float16 and use_fp16): raise TypeError('Unsloth: Model is in bfloat16 precision but you want to use float16 precision. Set fp16 to `False` and bf16 to `True`')
+        if force_float32:
+            args.fp16 = False
+            args.bf16 = False
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'no'
+        elif (not use_bf16 and not use_fp16) and mixed_precision_dtype == 'float32':
+            args.fp16 = float16
+            args.bf16 = not float16
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'fp16' if float16 else 'bf16'
+        if getattr(args, 'eval_dataset', None) is not None and getattr(args, 'eval_strategy', 'no') == 'no':
+            args.eval_strategy = 'steps'
+            if getattr(args, 'eval_steps', None) is None: args.eval_steps = 0.1
+        ga_steps = getattr(args, 'gradient_accumulation_steps', None)
+        if ga_steps is not None and ga_steps > 1:
+            from transformers import __version__ as transformers_version
+            if Version(transformers_version) <= Version('4.45.2'):
+                print('**** Unsloth: Please use our fixed gradient_accumulation_steps by updating transformers, TRL and Unsloth!\n'
+                      '`pip install --upgrade --no-cache-dir --force-reinstall --no-deps unsloth transformers trl unsloth_zoo`')
+        if getattr(args, 'eval_strategy', 'no') != 'no':
+            eval_bsz = getattr(args, 'per_device_eval_batch_size', 8)
+            if eval_bsz == 8 and args.per_device_train_batch_size < eval_bsz: args.per_device_eval_batch_size = args.per_device_train_batch_size
+            if getattr(args, 'eval_accumulation_steps', None) is None and ga_steps is not None: args.eval_accumulation_steps = ga_steps
+        fp16_full_eval = getattr(args, 'fp16_full_eval', False)
+        if type(fp16_full_eval) is not bool: fp16_full_eval = False
+        bf16_full_eval = getattr(args, 'bf16_full_eval', False)
+        if type(bf16_full_eval) is not bool: bf16_full_eval = False
+        if args.fp16 and bf16_full_eval: args.bf16_full_eval = False; args.fp16_full_eval = True
+        if args.bf16 and fp16_full_eval: args.bf16_full_eval = True; args.fp16_full_eval = False
+        if force_float32:
+            args.bf16_full_eval = False
+            args.fp16_full_eval = False
+        elif os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32') == 'bfloat16':
+            args.bf16_full_eval = True
+            args.fp16_full_eval = False
+        elif not bf16_full_eval and not fp16_full_eval:
+            args.bf16_full_eval = args.bf16
+            args.fp16_full_eval = args.fp16
+        _output_logits = False
+        if locals().get('compute_metrics', None) is not None: _output_logits = True
+        if locals().get('preprocess_logits_for_metrics', None) is not None: _output_logits = True
+        if _output_logits:
+            os.environ['UNSLOTH_RETURN_LOGITS'] = '1'
+        if 'max_seq_length' not in locals() and not hasattr(args, 'max_seq_length'):
+            pass
+        else:
+            model_max_seq_length = getattr(model, 'max_seq_length', None)
+            args_max_seq_length  = getattr(args,  'max_seq_length', None)
+            if args_max_seq_length is None and model_max_seq_length is not None:
+                max_seq_length = model.max_seq_length
+                if hasattr(args, 'max_seq_length'): args.max_seq_length = max_seq_length
+        if model is not None and hasattr(model, 'for_training'):
+            model.for_training()
+        if 'tokenizer' in locals() and hasattr(tokenizer, 'padding_side'): tokenizer.padding_side = 'right'
+        if 'processing_class' in locals():
+            if hasattr(processing_class, 'padding_side'): processing_class.padding_side = 'right'
+            if hasattr(processing_class, 'tokenizer') and hasattr(processing_class.tokenizer, 'padding_side'): processing_class.tokenizer.padding_side = 'right'
+        __tokenizer = processing_class if 'processing_class' in locals() else tokenizer
+        from unsloth_zoo.vision_utils import UnslothVisionDataCollator
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if isinstance(data_collator, DataCollatorForSeq2Seq) and 'labels' not in train_dataset.column_names:
+                data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False, mlm_probability = 0.0)
+            elif isinstance(data_collator, TransformersDataCollatorForLanguageModeling) and 'labels' in train_dataset.column_names:
+                data_collator = DataCollatorForSeq2Seq(__tokenizer)
+        else:
+            if hasattr(args, 'remove_unused_columns'): args.remove_unused_columns = False
+            if hasattr(args, 'dataset_text_field'): args.dataset_text_field = ''
+            if hasattr(args, 'dataset_kwargs'): args.dataset_kwargs = {'skip_prepare_dataset': True}
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if not hasattr(__tokenizer, 'pad') and hasattr(__tokenizer, 'tokenizer'):
+                if isinstance(data_collator, DataCollatorForSeq2Seq):
+                    data_collator = DataCollatorForSeq2Seq(__tokenizer.tokenizer)
+                else:
+                    data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False, mlm_probability = 0.0)
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('orpo_trainer', other_metrics)
+        
+        super().__init__(
+            model = model,
+            args = args,
+            data_collator = data_collator,
+            train_dataset = train_dataset,
+            eval_dataset = eval_dataset,
+            processing_class = processing_class,
+            model_init = model_init,
+            callbacks = callbacks,
+            preprocess_logits_for_metrics = preprocess_logits_for_metrics,
+            peft_config = peft_config,
+            compute_metrics = compute_metrics,**kwargs)
+        if hasattr(self, 'neftune_hook_handle'):
+            self.neftune_hook_handle.remove()
+            if hasattr(self, 'neftune_hook_handle'): del self.neftune_hook_handle
+        if getattr(args, 'neftune_noise_alpha', None) is not None:
+            model.get_input_embeddings().neftune_noise_alpha = self.neftune_noise_alpha
+        pass
+        if hasattr(self, 'accelerator'):
+            scaler = self.accelerator.scaler
+            current_model = model
+            while hasattr(current_model, 'model'):
+                current_model.accelerator_scaler = scaler
+                current_model = current_model.model
+            current_model.accelerator_scaler = scaler
+        pass
+        
+pass

unsloth_compiled_cache/UnslothOnlineDPOTrainer.py

@@ -0,0 +1,1327 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.online_dpo_trainer import (Any, AutoModelForCausalLM, BaseImageProcessor, BasePairwiseJudge, Callable, DPODataCollatorWithPadding, DataCollator, DataLoader, Dataset, EvalPrediction, F, FeatureExtractionMixin, GenerationConfig, IterableDataset, OnlineDPOConfig, OnlineDPOTrainer, OptimizerNames, Optional, Path, PeftModel, PreTrainedModel, PreTrainedTokenizerBase, ProcessorMixin, SIMPLE_CHAT_TEMPLATE, Trainer, TrainerCallback, Union, apply_chat_template, create_reference_model, datasets, disable_dropout_in_model, empty_cache, generate_model_card, get_comet_experiment_url, get_reward, is_conversational, is_peft_available, is_wandb_available, jinja2, logging, maybe_apply_chat_template, nn, os, prepare_deepspeed, seed_worker, textwrap, torch, truncate_right, unwrap_model_for_generation, version, wandb, warnings, wraps, F, is_conversational, os, torch, F, Optional, PeftModel, PreTrainedModel, Trainer, is_peft_available, os, torch)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+def vLLMSamplingParams(**kwargs):
+    from vllm import SamplingParams
+    sampling_params = SamplingParams(**kwargs)
+    sampling_params._set_kwargs = kwargs
+    return sampling_params
+@dataclass
+class UnslothOnlineDPOConfig(OnlineDPOConfig):
+    """
+    
+    Configuration class for the [`OnlineDPOTrainer`].
+
+    This class includes only the parameters that are specific to Online DPO training. For a full list of training
+    arguments, please refer to the [`~transformers.TrainingArguments`] documentation. Note that default values in this
+    class may differ from those in [`~transformers.TrainingArguments`].
+
+    Using [`~transformers.HfArgumentParser`] we can turn this class into
+    [argparse](https://docs.python.org/3/library/argparse#module-argparse) arguments that can be specified on the
+    command line.
+
+    Parameters:
+        reward_model_path (`str` or `None`, *optional*, defaults to `None`):
+            Path to the reward model. Either `judge` or `reward_model_path` must be set, but not both.
+        judge (`str` or `None`, *optional*, defaults to `None`):
+            Name of the judge to use. Either `judge` or `reward_model_path` must be set, but not both.
+        max_new_tokens (`int`, *optional*, defaults to `64`):
+            Maximum number of tokens to generate per completion.
+        max_length (`int`, *optional*, defaults to `256`):
+            Maximum total length of the sequence (prompt + completion) used to compute log probabilities. If the
+            sequence exceeds this limit, the leftmost tokens will be truncated to preserve as much of the completion as
+            possible.
+        temperature (`float`, *optional*, defaults to `0.9`):
+            Temperature for sampling. The higher the temperature, the more random the completions.
+        missing_eos_penalty (`float` or `None`, *optional*, defaults to `None`):
+            Penalty applied to the score when the model fails to generate an EOS token. This is useful to encourage to
+            generate completions shorter than the maximum length (`max_new_tokens`). The penalty must be a positive
+            value.
+        beta (`float` or `list[float]`, *optional*, defaults to `0.1`):
+            Parameter controlling the deviation from the reference model. Higher β means less deviation from the
+            reference model. For the IPO loss (`loss_type="ipo"`), β is the regularization parameter denoted by τ in
+            the [paper](https://huggingface.co/papers/2310.12036). If a list of floats is provided then the β is
+            selected for each new epoch and the last β is used for the rest of the epochs.
+        loss_type (`str`, *optional*, defaults to `"sigmoid"`):
+            Type of loss to use. Possible values are:
+
+                - `"sigmoid"`: sigmoid loss from the original [DPO](https://huggingface.co/papers/2305.18290) paper.
+                - `"ipo"`: IPO loss from the [IPO](https://huggingface.co/papers/2310.12036) paper.
+
+        dataset_num_proc (`int` or `None`, *optional*, defaults to `None`):
+            Number of processes to use for processing the dataset.
+        disable_dropout (`bool`, *optional*, defaults to `True`):
+            Whether to disable dropout in the model and reference model.
+        use_vllm (`bool`, *optional*, defaults to `False`):
+            Whether to use vLLM for generating completions. Requires vLLM to be installed (`pip install vllm`).
+        vllm_model_impl (`str`, *optional*, defaults to `"vllm"`):
+            Model implementation to use for vLLM. Must be one of `"transformers"` or `"vllm"`. `"transformers"`: Use
+            the `transformers` backend for model implementation. `"vllm"`: Use the `vllm` library for model
+            implementation.
+        gpu_memory_utilization (`float`, *optional*, defaults to `0.55`):
+            The vLLM memory utilization. The default value is 0.55.
+        ds3_gather_for_generation (`bool`, *optional*, defaults to `True`):
+            This setting applies to DeepSpeed ZeRO-3. If enabled, the policy model weights are gathered for generation,
+            improving generation speed. However, disabling this option allows training models that exceed the VRAM
+            capacity of a single GPU, albeit at the cost of slower generation.
+        model_init_kwargs (`dict[str, Any]` or `None`, *optional*, defaults to `None`):
+            Keyword arguments to pass to `AutoModelForCausalLM.from_pretrained` when instantiating the model from a
+            string.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    max_seq_length : Optional[int] = field(
+        default = None,
+        metadata = {'help': 'Maximum sequence length to truncate to.'},
+    )
+    def __init__(
+        self,
+        output_dir = None,
+        overwrite_output_dir = None,
+        do_train = False,
+        do_eval = False,
+        do_predict = False,
+        eval_strategy = 'no',
+        prediction_loss_only = False,
+        per_device_train_batch_size = 4,
+        per_device_eval_batch_size = 4,
+        per_gpu_train_batch_size = None,
+        per_gpu_eval_batch_size = None,
+        gradient_accumulation_steps = 2,
+        eval_accumulation_steps = 2,
+        eval_delay = 0,
+        torch_empty_cache_steps = 250,
+        learning_rate = 5e-05,
+        weight_decay = 0.01,
+        adam_beta1 = 0.9,
+        adam_beta2 = 0.999,
+        adam_epsilon = 1e-08,
+        max_grad_norm = 1.0,
+        num_train_epochs = 3.0,
+        max_steps = -1,
+        lr_scheduler_type = 'linear',
+        warmup_ratio = 0.1,
+        warmup_steps = 0,
+        log_level = 'passive',
+        log_level_replica = 'warning',
+        log_on_each_node = True,
+        logging_dir = None,
+        logging_strategy = 'steps',
+        logging_first_step = False,
+        logging_steps = 1,
+        logging_nan_inf_filter = False,
+        save_strategy = 'steps',
+        save_steps = 500,
+        save_total_limit = None,
+        save_safetensors = True,
+        save_on_each_node = False,
+        save_only_model = False,
+        restore_callback_states_from_checkpoint = False,
+        no_cuda = False,
+        use_cpu = False,
+        use_mps_device = False,
+        seed = 3407,
+        data_seed = 3407,
+        jit_mode_eval = False,
+        use_ipex = False,
+        bf16 = False,
+        fp16 = False,
+        fp16_opt_level = 'O1',
+        half_precision_backend = 'auto',
+        bf16_full_eval = False,
+        fp16_full_eval = False,
+        tf32 = None,
+        local_rank = -1,
+        ddp_backend = None,
+        tpu_num_cores = None,
+        tpu_metrics_debug = False,
+        debug = '',
+        dataloader_drop_last = False,
+        eval_steps = None,
+        dataloader_num_workers = 0,
+        dataloader_prefetch_factor = None,
+        past_index = -1,
+        run_name = None,
+        disable_tqdm = None,
+        remove_unused_columns = True,
+        label_names = None,
+        load_best_model_at_end = False,
+        metric_for_best_model = None,
+        greater_is_better = None,
+        ignore_data_skip = False,
+        fsdp = '',
+        fsdp_min_num_params = 0,
+        fsdp_config = None,
+        fsdp_transformer_layer_cls_to_wrap = None,
+        accelerator_config = None,
+        deepspeed = None,
+        label_smoothing_factor = 0.0,
+        optim = 'adamw_8bit',
+        optim_args = None,
+        adafactor = False,
+        group_by_length = False,
+        length_column_name = 'length',
+        report_to = None,
+        ddp_find_unused_parameters = None,
+        ddp_bucket_cap_mb = None,
+        ddp_broadcast_buffers = None,
+        dataloader_pin_memory = True,
+        dataloader_persistent_workers = False,
+        skip_memory_metrics = True,
+        use_legacy_prediction_loop = False,
+        push_to_hub = False,
+        resume_from_checkpoint = None,
+        hub_model_id = None,
+        hub_strategy = 'every_save',
+        hub_token = None,
+        hub_private_repo = None,
+        hub_always_push = False,
+        hub_revision = None,
+        gradient_checkpointing = False,
+        gradient_checkpointing_kwargs = None,
+        include_inputs_for_metrics = False,
+        eval_do_concat_batches = True,
+        fp16_backend = 'auto',
+        push_to_hub_model_id = None,
+        push_to_hub_organization = None,
+        push_to_hub_token = None,
+        mp_parameters = '',
+        auto_find_batch_size = True,
+        full_determinism = False,
+        torchdynamo = None,
+        ray_scope = 'last',
+        ddp_timeout = 1800,
+        torch_compile = False,
+        torch_compile_backend = None,
+        torch_compile_mode = None,
+        include_tokens_per_second = False,
+        include_num_input_tokens_seen = False,
+        neftune_noise_alpha = None,
+        optim_target_modules = None,
+        batch_eval_metrics = False,
+        eval_on_start = False,
+        use_liger_kernel = False,
+        liger_kernel_config = None,
+        eval_use_gather_object = False,
+        average_tokens_across_devices = True,
+        reward_model_path = None,
+        judge = None,
+        max_new_tokens = 64,
+        max_length = 512,
+        temperature = 0.9,
+        missing_eos_penalty = None,
+        loss_type = 'sigmoid',
+        dataset_num_proc = None,
+        disable_dropout = True,
+        use_vllm = False,
+        vllm_model_impl = 'vllm',
+        gpu_memory_utilization = 0.55,
+        ds3_gather_for_generation = True,
+        model_init_kwargs = None,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        max_seq_length = None,
+        **kwargs,
+    ):
+        if learning_rate < 1e-7: raise FloatingPointError(f'Unsloth: Your learning rate of `{learning_rate}` is too small and less than 1e-7! Consider increasing it, otherwise gradient updates will be close to 0!')
+        if learning_rate > 1: raise OverflowError(f'Unsloth: Your learning rate of `{learning_rate}` is way too larger > 1! Consider decreasing it to 1e-1, otherwise gradient updates will explode!')
+        if output_dir is None and save_strategy == 'steps' and save_steps == 500:
+            output_dir = 'unsloth_training_checkpoints'
+            save_strategy = 'no'
+        if dataset_num_proc is None:
+            from multiprocessing import cpu_count
+            dataset_num_proc = min(cpu_count()*2, 2)
+        if temperature <= 0:
+            raise MathError('Unsloth: Please set a positive non-zero temperature since your results will be wrong.')
+        elif temperature >= 10:
+            raise MathError('Unsloth: Please set a positive non-zero temperature less than 10, since sampling will be quite erratic.')
+        
+        
+        super().__init__(
+            output_dir = output_dir,
+            overwrite_output_dir = overwrite_output_dir,
+            do_train = do_train,
+            do_eval = do_eval,
+            do_predict = do_predict,
+            eval_strategy = eval_strategy,
+            prediction_loss_only = prediction_loss_only,
+            per_device_train_batch_size = per_device_train_batch_size,
+            per_device_eval_batch_size = per_device_eval_batch_size,
+            per_gpu_train_batch_size = per_gpu_train_batch_size,
+            per_gpu_eval_batch_size = per_gpu_eval_batch_size,
+            gradient_accumulation_steps = gradient_accumulation_steps,
+            eval_accumulation_steps = eval_accumulation_steps,
+            eval_delay = eval_delay,
+            torch_empty_cache_steps = torch_empty_cache_steps,
+            learning_rate = learning_rate,
+            weight_decay = weight_decay,
+            adam_beta1 = adam_beta1,
+            adam_beta2 = adam_beta2,
+            adam_epsilon = adam_epsilon,
+            max_grad_norm = max_grad_norm,
+            num_train_epochs = num_train_epochs,
+            max_steps = max_steps,
+            lr_scheduler_type = lr_scheduler_type,
+            warmup_ratio = warmup_ratio,
+            warmup_steps = warmup_steps,
+            log_level = log_level,
+            log_level_replica = log_level_replica,
+            log_on_each_node = log_on_each_node,
+            logging_dir = logging_dir,
+            logging_strategy = logging_strategy,
+            logging_first_step = logging_first_step,
+            logging_steps = logging_steps,
+            logging_nan_inf_filter = logging_nan_inf_filter,
+            save_strategy = save_strategy,
+            save_steps = save_steps,
+            save_total_limit = save_total_limit,
+            save_safetensors = save_safetensors,
+            save_on_each_node = save_on_each_node,
+            save_only_model = save_only_model,
+            restore_callback_states_from_checkpoint = restore_callback_states_from_checkpoint,
+            no_cuda = no_cuda,
+            use_cpu = use_cpu,
+            use_mps_device = use_mps_device,
+            seed = seed,
+            data_seed = data_seed,
+            jit_mode_eval = jit_mode_eval,
+            use_ipex = use_ipex,
+            bf16 = bf16,
+            fp16 = fp16,
+            fp16_opt_level = fp16_opt_level,
+            half_precision_backend = half_precision_backend,
+            bf16_full_eval = bf16_full_eval,
+            fp16_full_eval = fp16_full_eval,
+            tf32 = tf32,
+            local_rank = local_rank,
+            ddp_backend = ddp_backend,
+            tpu_num_cores = tpu_num_cores,
+            tpu_metrics_debug = tpu_metrics_debug,
+            debug = debug,
+            dataloader_drop_last = dataloader_drop_last,
+            eval_steps = eval_steps,
+            dataloader_num_workers = dataloader_num_workers,
+            dataloader_prefetch_factor = dataloader_prefetch_factor,
+            past_index = past_index,
+            run_name = run_name,
+            disable_tqdm = disable_tqdm,
+            remove_unused_columns = remove_unused_columns,
+            label_names = label_names,
+            load_best_model_at_end = load_best_model_at_end,
+            metric_for_best_model = metric_for_best_model,
+            greater_is_better = greater_is_better,
+            ignore_data_skip = ignore_data_skip,
+            fsdp = fsdp,
+            fsdp_min_num_params = fsdp_min_num_params,
+            fsdp_config = fsdp_config,
+            fsdp_transformer_layer_cls_to_wrap = fsdp_transformer_layer_cls_to_wrap,
+            accelerator_config = accelerator_config,
+            deepspeed = deepspeed,
+            label_smoothing_factor = label_smoothing_factor,
+            optim = optim,
+            optim_args = optim_args,
+            adafactor = adafactor,
+            group_by_length = group_by_length,
+            length_column_name = length_column_name,
+            report_to = report_to,
+            ddp_find_unused_parameters = ddp_find_unused_parameters,
+            ddp_bucket_cap_mb = ddp_bucket_cap_mb,
+            ddp_broadcast_buffers = ddp_broadcast_buffers,
+            dataloader_pin_memory = dataloader_pin_memory,
+            dataloader_persistent_workers = dataloader_persistent_workers,
+            skip_memory_metrics = skip_memory_metrics,
+            use_legacy_prediction_loop = use_legacy_prediction_loop,
+            push_to_hub = push_to_hub,
+            resume_from_checkpoint = resume_from_checkpoint,
+            hub_model_id = hub_model_id,
+            hub_strategy = hub_strategy,
+            hub_token = hub_token,
+            hub_private_repo = hub_private_repo,
+            hub_always_push = hub_always_push,
+            hub_revision = hub_revision,
+            gradient_checkpointing = gradient_checkpointing,
+            gradient_checkpointing_kwargs = gradient_checkpointing_kwargs,
+            include_inputs_for_metrics = include_inputs_for_metrics,
+            eval_do_concat_batches = eval_do_concat_batches,
+            fp16_backend = fp16_backend,
+            push_to_hub_model_id = push_to_hub_model_id,
+            push_to_hub_organization = push_to_hub_organization,
+            push_to_hub_token = push_to_hub_token,
+            mp_parameters = mp_parameters,
+            auto_find_batch_size = auto_find_batch_size,
+            full_determinism = full_determinism,
+            torchdynamo = torchdynamo,
+            ray_scope = ray_scope,
+            ddp_timeout = ddp_timeout,
+            torch_compile = torch_compile,
+            torch_compile_backend = torch_compile_backend,
+            torch_compile_mode = torch_compile_mode,
+            include_tokens_per_second = include_tokens_per_second,
+            include_num_input_tokens_seen = include_num_input_tokens_seen,
+            neftune_noise_alpha = neftune_noise_alpha,
+            optim_target_modules = optim_target_modules,
+            batch_eval_metrics = batch_eval_metrics,
+            eval_on_start = eval_on_start,
+            use_liger_kernel = use_liger_kernel,
+            liger_kernel_config = liger_kernel_config,
+            eval_use_gather_object = eval_use_gather_object,
+            average_tokens_across_devices = average_tokens_across_devices,
+            reward_model_path = reward_model_path,
+            judge = judge,
+            max_new_tokens = max_new_tokens,
+            max_length = max_length,
+            temperature = temperature,
+            missing_eos_penalty = missing_eos_penalty,
+            loss_type = loss_type,
+            dataset_num_proc = dataset_num_proc,
+            disable_dropout = disable_dropout,
+            use_vllm = use_vllm,
+            vllm_model_impl = vllm_model_impl,
+            gpu_memory_utilization = gpu_memory_utilization,
+            ds3_gather_for_generation = ds3_gather_for_generation,
+            model_init_kwargs = model_init_kwargs,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        self.max_seq_length = max_seq_length
+pass
+
+class _UnslothOnlineDPOTrainer(Trainer):
+    r""""""
+
+    _tag_names = ["trl", "online-dpo"]
+
+    def __init__(
+        self,
+        model: Union[PreTrainedModel, nn.Module, str],
+        ref_model: Union[PreTrainedModel, nn.Module, None] = None,
+        reward_model: Union[PreTrainedModel, nn.Module, None] = None,
+        judge: Optional[BasePairwiseJudge] = None,
+        args: Optional[OnlineDPOConfig] = None,
+        data_collator: Optional[DataCollator] = None,
+        train_dataset: Optional[Union[Dataset, IterableDataset, "datasets.Dataset"]] = None,
+        eval_dataset: Optional[Union[Dataset, dict[str, Dataset], "datasets.Dataset"]] = None,
+        processing_class: Optional[
+            Union[PreTrainedTokenizerBase, BaseImageProcessor, FeatureExtractionMixin, ProcessorMixin]
+        ] = None,
+        reward_processing_class: Optional[PreTrainedTokenizerBase] = None,
+        peft_config: Optional[dict] = None,
+        compute_metrics: Optional[Callable[[EvalPrediction], dict]] = None,
+        callbacks: Optional[list[TrainerCallback]] = None,
+        optimizers: tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR] = (None, None),
+        preprocess_logits_for_metrics: Optional[Callable[[torch.Tensor, torch.Tensor], torch.Tensor]] = None,
+    ) -> None:
+
+        if hasattr(model, 'vllm_engine') and hasattr(args, 'use_vllm'):
+            if (getattr(args, 'use_vllm', False) == False):
+                args.use_vllm = True
+        if ref_model is model:
+            raise ValueError(
+                "`model` and `ref_model` cannot be the same object. If you want `ref_model` to be the "
+                "same as `model`, either omit the `ref_model` argument or pass `None`."
+            )
+
+        self.ref_model = ref_model
+
+        if reward_model is not None and judge is not None:
+            warnings.warn(
+                "Both `reward_model` and `judge` are provided. Please choose provide only one of them. "
+                "Ignoring `judge` and using `reward_model`.",
+                UserWarning,
+            )
+            judge = None
+        elif reward_model is None and judge is None:
+            raise ValueError("Either `reward_model` or `judge` must be provided.")
+
+        self.reward_model = reward_model
+        self.reward_processing_class = reward_processing_class
+        self.judge = judge
+
+        if args.missing_eos_penalty is not None and judge is not None:
+            raise ValueError("`missing_eos_penalty` is not supported when `judge` is provided.")
+
+        if args is None:
+            raise ValueError("`args` must be provided.")
+
+        # Check that the processing_class is provided
+        if processing_class is None:
+            raise ValueError("`processing_class` must be provided.")
+
+        model_init_kwargs = args.model_init_kwargs or {}
+        if isinstance(model, str):
+            model_id = model
+
+            # Handle torch_dtype in model_init_kwargs
+            torch_dtype = model_init_kwargs.get("torch_dtype")
+            if isinstance(torch_dtype, torch.dtype) or torch_dtype == "auto" or torch_dtype is None:
+                pass
+            elif isinstance(torch_dtype, str):
+                torch_dtype = getattr(torch, torch_dtype)
+                model_init_kwargs["torch_dtype"] = torch_dtype
+            else:
+                raise ValueError(
+                    "Invalid `torch_dtype` passed to `OnlineDPOConfig`. Expected either 'auto' or a string "
+                    f"representing a `torch.dtype` (e.g., 'float32'), but got {torch_dtype}."
+                )
+
+            model = AutoModelForCausalLM.from_pretrained(model_id, **model_init_kwargs)
+        else:
+            if args.model_init_kwargs is not None:
+                raise ValueError(
+                    "You passed `model_init_kwargs` to the `OnlineDPOConfig`, but your model is already instantiated. "
+                    "This argument can only be used when the `model` argument is a string."
+                )
+        self.is_encoder_decoder = model.config.is_encoder_decoder
+
+        # Convert to PEFT model if peft_config is provided
+        if False:
+            # Check if PEFT is available
+            if not is_peft_available():
+                raise ImportError(
+                    "PEFT is not available and passed `peft_config`. Please install PEFT with "
+                    "`pip install peft` to use it."
+                )
+
+            # If the model is already a PeftModel, we need to merge and unload it.
+            # Further information here: https://huggingface.co/docs/trl/dpo_trainer#reference-model-considerations-with-peft
+            if isinstance(model, PeftModel):
+                model = model.merge_and_unload()
+
+            # Get peft model with the given config
+            model = model
+
+        # Disable dropout in the model and reference model
+        if args.disable_dropout:
+            disable_dropout_in_model(model)
+            if self.ref_model is not None:
+                disable_dropout_in_model(self.ref_model)
+
+        # Handle the ref_model
+        # Usually, the user wants the ref model to be the initial version of the model. When using PEFT, it's easy to
+        # get the ref model, as it's just the model with a disabled adapter. When not using PEFT, we need to create
+        # the ref model from the model by copying it and disable the gradients and set it in evaluation mode.
+        if ref_model is None:  # No ref model provided, the most common case
+            if False:
+                self.ref_model = create_reference_model(model)  # copy, disable gradients, set eval mode
+            else:
+                self.ref_model = None  # we don't need a ref model here, we can just disable the adapter.
+        else:  # rare case, the user provided a ref model
+            self.ref_model = ref_model
+            self.ref_model.eval()
+
+        # Disable the gradient and set the reward model in eval mode
+        if self.reward_model is not None:
+            self.reward_model.eval()
+
+        # Define the collator is not provided
+        if data_collator is None:
+            data_collator = DPODataCollatorWithPadding(pad_token_id=processing_class.pad_token_id)
+
+        self.max_length = args.max_length
+
+        self.stats = {
+            "objective/kl": [],
+            "objective/entropy": [],
+            "objective/non_score_reward": [],
+            "rewards/chosen": [],
+            "rewards/rejected": [],
+            "rewards/accuracies": [],
+            "rewards/margins": [],
+            "logps/chosen": [],
+            "logps/rejected": [],
+            "val/contain_eos_token": [],
+            "beta": [],
+        }
+        if self.reward_model is not None:
+            self.stats["objective/rlhf_reward"] = []
+            self.stats["objective/scores_margin"] = []
+            self.stats["objective/scores"] = []
+
+        if args.use_vllm:
+            self.llm = model.vllm_engine; self._last_loaded_step = 0; self.generation_config = SamplingParams(
+                n=2,
+                max_tokens=args.max_new_tokens,
+                temperature=args.temperature,
+                top_k=50,
+                top_p=1.0,
+                detokenize=False,
+                **getattr(getattr(args, 'vllm_sampling_params', vLLMSamplingParams()), '_set_kwargs', {}),
+            )
+        else:
+            self.generation_config = GenerationConfig(
+                max_new_tokens=args.max_new_tokens,
+                temperature=args.temperature,
+                top_k=50,
+                top_p=1.0,
+                do_sample=True,
+                use_cache=False if args.gradient_checkpointing else True,
+            )
+
+        # The trainer estimates the number of FLOPs [floating-point operations] using the number of elements in the
+        # input tensor associated with the key "input_ids". However, in Online DPO, the sampled data does not include
+        # the "input_ids" key. As a result, the trainer issues the warning: "Could not estimate the number of tokens
+        # of the input, floating-point operations will not be computed." To suppress this warning, we set the
+        # "estimate_tokens" key in the model's "warnings_issued" dictionary to True. This acts as a flag to indicate
+        # that the warning has already been issued.
+        model.warnings_issued["estimate_tokens"] = True
+
+        super().__init__(
+            model=model,
+            args=args,
+            data_collator=data_collator,
+            train_dataset=train_dataset,
+            eval_dataset=eval_dataset,
+            processing_class=processing_class,
+            compute_metrics=compute_metrics,
+            callbacks=callbacks,
+            optimizers=optimizers,
+            preprocess_logits_for_metrics=preprocess_logits_for_metrics,
+        )
+
+        # Add tags for models that have been loaded with the correct transformers version
+        if hasattr(self.model, "add_model_tags"):
+            self.model.add_model_tags(self._tag_names)
+
+        self._beta = args.beta
+
+        # Placed after the super[].__init__ because we need self.is_deepspeed_enabled and self.accelerator
+        if self.is_deepspeed_enabled:
+            if self.reward_model is not None:
+                self.reward_model = prepare_deepspeed(
+                    self.reward_model, args.per_device_train_batch_size, args.fp16, args.bf16
+                )
+            if self.ref_model is not None:
+                self.ref_model = prepare_deepspeed(
+                    self.ref_model, args.per_device_train_batch_size, args.fp16, args.bf16
+                )
+        else:
+            if self.ref_model is not None:
+                self.ref_model = self.ref_model.to(self.accelerator.device)
+            if self.reward_model is not None:
+                self.reward_model = self.reward_model.to(self.accelerator.device)
+
+    @property
+    def beta(self):
+        if isinstance(self._beta, list):
+            epoch = self.state.epoch
+            return self._beta[epoch] if epoch < len(self._beta) else self._beta[-1]
+        else:
+            return self._beta
+
+    @staticmethod
+    def tokenize_row(feature, is_encoder_decoder: bool, tokenizer: PreTrainedTokenizerBase) -> dict[str, Any]:
+        """Tokenize a single row from a DPO specific dataset."""
+        if not is_encoder_decoder:
+            batch = tokenizer(feature["prompt"], add_special_tokens=False)
+            # Add BOS token to head of prompt. Avoid adding if it's already there
+            if tokenizer.bos_token_id is not None:
+                prompt_len_input_ids = len(batch["input_ids"])
+                if prompt_len_input_ids == 0 or tokenizer.bos_token_id != batch["input_ids"][0]:
+                    batch["input_ids"] = [tokenizer.bos_token_id] + batch["input_ids"]
+                    batch["attention_mask"] = [1] + batch["attention_mask"]
+        else:
+            batch = tokenizer(feature["prompt"], add_special_tokens=True)
+        batch = {f"prompt_{key}": value for key, value in batch.items()}
+        return batch
+
+    # Same as Trainer.get_train_dataloader but skip the "remove_unused_columns".
+    @wraps(Trainer.get_train_dataloader)
+    def get_train_dataloader(self) -> DataLoader:
+        if self.train_dataset is None:
+            raise ValueError("Trainer: training requires a train_dataset.")
+
+        train_dataset = self.train_dataset
+        data_collator = self.data_collator
+        dataloader_params = {
+            "batch_size": self._train_batch_size,
+            "collate_fn": data_collator,
+            "num_workers": self.args.dataloader_num_workers,
+            "pin_memory": self.args.dataloader_pin_memory,
+            "persistent_workers": self.args.dataloader_persistent_workers,
+        }
+
+        if not isinstance(train_dataset, torch.utils.data.IterableDataset):
+            dataloader_params["sampler"] = self._get_train_sampler()
+            dataloader_params["drop_last"] = self.args.dataloader_drop_last
+            dataloader_params["worker_init_fn"] = seed_worker
+            dataloader_params["prefetch_factor"] = self.args.dataloader_prefetch_factor
+
+        return self.accelerator.prepare(DataLoader(train_dataset, **dataloader_params))
+
+    # Same as Trainer.get_eval_dataloader but skip the "remove_unused_columns".
+    @wraps(Trainer.get_eval_dataloader)
+    def get_eval_dataloader(self, eval_dataset: Optional[Union[str, Dataset]] = None) -> DataLoader:
+        if eval_dataset is None and self.eval_dataset is None:
+            raise ValueError("Trainer: evaluation requires an eval_dataset.")
+
+        # If we have persistent workers, don't do a fork bomb especially as eval datasets
+        # don't change during training
+        dataloader_key = eval_dataset if isinstance(eval_dataset, str) else "eval"
+        if (
+            hasattr(self, "_eval_dataloaders")
+            and dataloader_key in self._eval_dataloaders
+            and self.args.dataloader_persistent_workers
+        ):
+            return self.accelerator.prepare(self._eval_dataloaders[dataloader_key])
+
+        eval_dataset = (
+            self.eval_dataset[eval_dataset]
+            if isinstance(eval_dataset, str)
+            else eval_dataset
+            if eval_dataset is not None
+            else self.eval_dataset
+        )
+        data_collator = self.data_collator
+
+        dataloader_params = {
+            "batch_size": self.args.eval_batch_size,
+            "collate_fn": data_collator,
+            "num_workers": self.args.dataloader_num_workers,
+            "pin_memory": self.args.dataloader_pin_memory,
+            "persistent_workers": self.args.dataloader_persistent_workers,
+        }
+
+        if not isinstance(eval_dataset, torch.utils.data.IterableDataset):
+            dataloader_params["sampler"] = self._get_eval_sampler(eval_dataset)
+            dataloader_params["drop_last"] = self.args.dataloader_drop_last
+            dataloader_params["prefetch_factor"] = self.args.dataloader_prefetch_factor
+
+        # accelerator.free_memory() will destroy the references, so
+        # we need to store the non-prepared version
+        eval_dataloader = DataLoader(eval_dataset, **dataloader_params)
+        if self.args.dataloader_persistent_workers:
+            if hasattr(self, "_eval_dataloaders"):
+                self._eval_dataloaders[dataloader_key] = eval_dataloader
+            else:
+                self._eval_dataloaders = {dataloader_key: eval_dataloader}
+
+        return self.accelerator.prepare(eval_dataloader)
+
+    def _generate_vllm(self, model, prompts):
+        eos_token_id = self.processing_class.eos_token_id
+        pad_token_id = self.processing_class.pad_token_id
+
+        # Load the latest weights
+
+        pass
+
+        pass
+
+        if is_conversational({"prompt": prompts[0]}):
+            outputs = self.llm.chat(prompts, self.generation_config, use_tqdm=False, lora_request = self.model.load_lora('online_dpo_trainer_lora_model', load_tensors = True))
+        else:
+            outputs = self.llm.generate(prompts, self.generation_config, use_tqdm=False, lora_request = self.model.load_lora('online_dpo_trainer_lora_model', load_tensors = True))
+
+        completion_ids = [list(output.outputs[i].token_ids) for i in range(2) for output in outputs]
+        prompt_ids = [list(output.prompt_token_ids) for _ in range(2) for output in outputs]
+
+        # Create mask and pad the prompt and completion
+        max_prompt_length = max(len(ids) for ids in prompt_ids)
+        prompt_mask = [[0] * (max_prompt_length - len(ids)) + [1] * len(ids) for ids in prompt_ids]
+        prompt_ids = [[pad_token_id] * (max_prompt_length - len(ids)) + ids for ids in prompt_ids]
+        max_tokens = self.generation_config.max_tokens
+        completion_mask = [[1] * len(ids) + [0] * (max_tokens - len(ids)) for ids in completion_ids]
+        completion_ids = [
+            ids + [eos_token_id] if ids[-1] != eos_token_id and len(ids) < max_tokens else ids
+            for ids in completion_ids
+        ]
+        completion_ids = [ids + [pad_token_id] * (max_tokens - len(ids)) for ids in completion_ids]
+
+        # Convert to tensors
+        prompt_ids = torch.tensor(prompt_ids, device=self.accelerator.device)
+        prompt_mask = torch.tensor(prompt_mask, device=self.accelerator.device)
+        completion_ids = torch.tensor(completion_ids, device=self.accelerator.device)
+        completion_mask = torch.tensor(completion_mask, device=self.accelerator.device)
+
+        return prompt_ids, prompt_mask, completion_ids, completion_mask
+
+    def _generate(self, model, prompts):
+        eos_token_id = self.processing_class.eos_token_id
+        pad_token_id = self.processing_class.pad_token_id
+
+        # Apply chat template and tokenize the input. We do this on-the-fly to enable the use of reward models and
+        # policies with different tokenizers / chat templates.
+        inputs = [{"prompt": prompt} for prompt in prompts]
+        inputs = [maybe_apply_chat_template(x, self.processing_class) for x in inputs]
+        inputs = [self.tokenize_row(x, self.is_encoder_decoder, self.processing_class) for x in inputs]
+        inputs = self.data_collator(inputs)
+
+        # Sample 2 completions per prompt of size `max_new_tokens` from the model
+        inputs = self._prepare_inputs(inputs)
+        prompt_ids = inputs["prompt_input_ids"].repeat(2, 1)
+        prompt_mask = inputs["prompt_attention_mask"].repeat(2, 1)
+        with unwrap_model_for_generation(
+            model, self.accelerator, gather_deepspeed3_params=self.args.ds3_gather_for_generation
+        ) as unwrapped_model:
+            output = unwrapped_model.generate(
+                input_ids=prompt_ids,
+                attention_mask=prompt_mask,
+                generation_config=self.generation_config,
+            )
+
+        completion_ids = output[:, prompt_ids.size(1) :]
+        completion_ids, completion_mask = truncate_right(completion_ids, eos_token_id, pad_token_id)
+
+        return prompt_ids, prompt_mask, completion_ids, completion_mask
+
+    def _forward(self, model, prompt_ids, prompt_mask, completion_ids, completion_mask):
+        # Get the number of tokens to truncate from prompt
+        num_tokens_to_truncate = max(prompt_ids.size(1) + completion_ids.size(1) - self.max_length, 0)
+
+        # Truncate left to avoid oom
+        prompt_ids = prompt_ids[:, num_tokens_to_truncate:]
+        prompt_mask = prompt_mask[:, num_tokens_to_truncate:]
+
+        # Concat the prompt and completion
+        prompt_completion_ids = torch.cat((prompt_ids, completion_ids), dim=1)
+        prompt_completion_mask = torch.cat((prompt_mask, completion_mask), dim=1)
+
+        # Get the logprobs of the completions from the model
+        output = model(prompt_completion_ids, attention_mask=prompt_completion_mask)
+
+        # There is 1 offset, because the model predict the next token
+        prompt_len = prompt_ids.size(1)
+        start_idx = prompt_len - 1 if prompt_len > 0 else 0
+        logits = output.logits[:, start_idx:-1]
+
+        # Take the completion tokens logprob
+        logprobs = torch.take_along_dim(logits.log_softmax(dim=-1), completion_ids.unsqueeze(-1), dim=2).squeeze(-1)
+        return logprobs
+
+    def training_step(
+        self, model: nn.Module, inputs: dict[str, Union[torch.Tensor, Any]], num_items_in_batch: Optional[int] = None
+    ) -> torch.Tensor:
+        model.train()
+
+        prompts = inputs["prompt"]
+        batch_size = len(prompts)
+
+        if self.args.use_vllm:
+            prompt_ids, prompt_mask, completion_ids, completion_mask = self._generate_vllm(model, prompts)
+        else:
+            prompt_ids, prompt_mask, completion_ids, completion_mask = self._generate(model, prompts)
+
+        contain_eos_token = torch.any(completion_ids == self.processing_class.eos_token_id, dim=-1)
+
+        logprobs = self._forward(model, prompt_ids, prompt_mask, completion_ids, completion_mask)
+        with torch.no_grad():
+            if self.ref_model is not None:
+                ref_logprobs = self._forward(self.ref_model, prompt_ids, prompt_mask, completion_ids, completion_mask)
+            else:  # peft case: we just need to disable the adapter
+                with self.model.disable_adapter():
+                    ref_logprobs = self._forward(self.model, prompt_ids, prompt_mask, completion_ids, completion_mask)
+
+        # Decode the completions, and format them if the input is conversational
+        device = logprobs.device
+        completions = self.processing_class.batch_decode(completion_ids, skip_special_tokens=True)
+        if is_conversational({"prompt": prompts[0]}):
+            completions = [[{"role": "assistant", "content": completion}] for completion in completions]
+
+        # Get the reward from the reward model or judge
+        if self.judge is not None:
+            # Once formatted, conversational data may contain special tokens (such as <|im_start|>) that are not
+            # directly understandable by the judge and could alter its judgment. To avoid this and make the judge
+            # independent of the model's chat template, we use the raw conversation data, and apply our own chat
+            # template to it.
+            if is_conversational({"prompt": prompts[0]}):
+                environment = jinja2.Environment()
+                template = environment.from_string(SIMPLE_CHAT_TEMPLATE)
+                prompts = [template.render(messages=prompt) for prompt in prompts]
+                completions = [template.render(messages=completion) for completion in completions]
+
+            ranks_of_first_completion = self.judge.judge(
+                prompts, list(zip(completions[:batch_size], completions[batch_size:]))
+            )
+
+            # convert ranks to a True/False mask:
+            # when rank == 0, it means the first completion is the best
+            # when rank == 1, it means the second completion is the best
+            mask = torch.tensor([rank == 0 for rank in ranks_of_first_completion], device=device)
+        else:
+            # The reward model may not have the same chat template or tokenizer as the model, so we need to use the
+            # raw data (string), apply the chat template (if needed), and tokenize it with the reward processing class.
+            prompts = 2 * prompts  # repeat the prompt: [prompt0, prompt1] -> [prompt0, prompt1, prompt0, prompt1]
+            if is_conversational({"prompt": prompts[0]}):
+                examples = [{"prompt": p, "completion": c} for p, c in zip(prompts, completions)]
+                examples = [apply_chat_template(example, self.reward_processing_class) for example in examples]
+                prompts = [example["prompt"] for example in examples]
+                completions = [example["completion"] for example in examples]
+
+            # Tokenize the prompts
+            prompts_ids = self.reward_processing_class(
+                prompts, padding=True, return_tensors="pt", padding_side="left"
+            )["input_ids"].to(device)
+            context_length = prompts_ids.shape[1]
+
+            # Tokenize the completions
+            completions_ids = self.reward_processing_class(
+                completions, padding=True, return_tensors="pt", padding_side="right"
+            )["input_ids"].to(device)
+
+            # Concatenate the prompts and completions and get the reward
+            prompt_completion_ids = torch.cat((prompts_ids, completions_ids), dim=1)
+            with torch.inference_mode():
+                _, scores, _ = get_reward(
+                    self.reward_model, prompt_completion_ids, self.reward_processing_class.pad_token_id, context_length
+                )
+
+                # Filter completion. Ensure that the sample contains stop_token_id
+                # Completions not passing that filter will receive a lower score.
+                if self.args.missing_eos_penalty is not None:
+                    scores[~contain_eos_token] -= self.args.missing_eos_penalty
+
+            # Split the scores in 2 (the prompts of the first half are the same as the second half)
+            first_half, second_half = scores.split(batch_size)
+
+            # Get the indices of the chosen and rejected examples
+            mask = first_half >= second_half
+
+        batch_range = torch.arange(batch_size, device=device)
+        chosen_indices = batch_range + (~mask * batch_size)
+        rejected_indices = batch_range + (mask * batch_size)
+
+        # Build tensor so that the first half is the chosen examples and the second half the rejected examples
+        cr_indices = torch.cat((chosen_indices, rejected_indices), dim=0)  # cr = chosen and rejected
+        cr_logprobs = logprobs[cr_indices]
+        cr_ref_logprobs = ref_logprobs[cr_indices]
+
+        # mask out the padding tokens
+        padding_mask = ~completion_mask.bool()
+        cr_padding_mask = padding_mask[cr_indices]
+
+        cr_logprobs_sum = (cr_logprobs * ~cr_padding_mask).sum(1)
+        cr_ref_logprobs_sum = (cr_ref_logprobs * ~cr_padding_mask).sum(1)
+
+        # Split the chosen and rejected examples
+        chosen_logprobs_sum, rejected_logprobs_sum = torch.split(cr_logprobs_sum, batch_size)
+        chosen_ref_logprobs_sum, rejected_ref_logprobs_sum = torch.split(cr_ref_logprobs_sum, batch_size)
+        pi_logratios = chosen_logprobs_sum - rejected_logprobs_sum
+        ref_logratios = chosen_ref_logprobs_sum - rejected_ref_logprobs_sum
+
+        logits = pi_logratios - ref_logratios
+
+        if self.args.loss_type == "sigmoid":
+            losses = -F.logsigmoid(self.beta * logits)
+        elif self.args.loss_type == "ipo":
+            losses = (logits - 1 / (2 * self.beta)) ** 2
+        else:
+            raise NotImplementedError(f"invalid loss type {self.loss_type}")
+
+        loss = losses.mean()
+
+        # Log everything
+        if self.reward_model is not None:
+            scores_margin = scores[chosen_indices] - scores[rejected_indices]
+            self.stats["objective/scores_margin"].append(
+                self.accelerator.gather_for_metrics(scores_margin.mean()).mean().item()
+            )
+            self.stats["objective/scores"].append(self.accelerator.gather_for_metrics(scores.mean()).mean().item())
+        self.stats["val/contain_eos_token"].append(contain_eos_token.float().mean().item())
+        self.stats["logps/chosen"].append(self.accelerator.gather_for_metrics(chosen_logprobs_sum).mean().item())
+        self.stats["logps/rejected"].append(self.accelerator.gather_for_metrics(rejected_logprobs_sum).mean().item())
+
+        kl = logprobs - ref_logprobs
+        mean_kl = kl.sum(1).mean()
+        self.stats["objective/kl"].append(self.accelerator.gather_for_metrics(mean_kl).mean().item())
+        non_score_reward = (-self.beta * kl).sum(1)
+        mean_non_score_reward = non_score_reward.mean()
+        self.stats["objective/non_score_reward"].append(
+            self.accelerator.gather_for_metrics(mean_non_score_reward).mean().item()
+        )
+        if self.reward_model is not None:
+            rlhf_reward = scores + non_score_reward
+            self.stats["objective/rlhf_reward"].append(self.accelerator.gather_for_metrics(rlhf_reward).mean().item())
+        mean_entropy = -logprobs.sum(1).mean()
+        self.stats["objective/entropy"].append(self.accelerator.gather_for_metrics(mean_entropy).mean().item())
+        chosen_rewards = self.beta * (chosen_logprobs_sum - chosen_ref_logprobs_sum)
+        gathered_chosen_rewards = self.accelerator.gather_for_metrics(chosen_rewards)
+        self.stats["rewards/chosen"].append(gathered_chosen_rewards.mean().item())
+        rejected_rewards = self.beta * (rejected_logprobs_sum - rejected_ref_logprobs_sum)
+        gathered_rejected_rewards = self.accelerator.gather_for_metrics(rejected_rewards)
+        self.stats["rewards/rejected"].append(gathered_rejected_rewards.mean().item())
+        margin = gathered_chosen_rewards - gathered_rejected_rewards
+        self.stats["rewards/margins"].append(margin.mean().item())
+        accuracy = margin > 0
+        self.stats["rewards/accuracies"].append(accuracy.float().mean().item())
+        self.stats["beta"].append(self.beta)
+
+        if (
+            self.args.torch_empty_cache_steps is not None
+            and self.state.global_step % self.args.torch_empty_cache_steps == 0
+        ):
+            empty_cache()
+
+        kwargs = {}
+
+        # For LOMO optimizers you need to explicitly use the learning rate
+        if self.args.optim in [OptimizerNames.LOMO, OptimizerNames.ADALOMO]:
+            kwargs["learning_rate"] = self._get_learning_rate()
+
+        if self.args.n_gpu > 1:
+            loss = loss.mean()  # mean() to average on multi-gpu parallel training
+
+        if self.use_apex:
+            with amp.scale_loss(loss, self.optimizer) as scaled_loss:
+                scaled_loss.backward()
+        else:
+            self.accelerator.backward(loss, **kwargs)
+
+        return loss.detach() / self.args.gradient_accumulation_steps
+
+    # Same as Trainer._maybe_log_save_evaluate but log our metrics
+    def _maybe_log_save_evaluate(
+        self, tr_loss, grad_norm, model, trial, epoch, ignore_keys_for_eval, start_time, learning_rate=None
+    ):
+        if self.control.should_log and self.state.global_step > self._globalstep_last_logged:
+            logs: dict[str, float] = {}
+
+            # all_gather + mean() to get average loss over all processes
+            tr_loss_scalar = self._nested_gather(tr_loss).mean().item()
+
+            # reset tr_loss to zero
+            tr_loss -= tr_loss
+
+            logs["loss"] = round(tr_loss_scalar / (self.state.global_step - self._globalstep_last_logged), 4)
+            if grad_norm is not None:
+                logs["grad_norm"] = grad_norm.detach().item() if isinstance(grad_norm, torch.Tensor) else grad_norm
+            if learning_rate is not None:
+                logs["learning_rate"] = learning_rate
+            else:
+                logs["learning_rate"] = self._get_learning_rate()
+
+            # Add our metrics
+            for key, val in self.stats.items():
+                logs[key] = sum(val) / len(val)
+            self.stats = {key: [] for key in self.stats}  # reset stats
+
+            self._total_loss_scalar += tr_loss_scalar
+            self._globalstep_last_logged = self.state.global_step
+            self.store_flos()
+            self.log(logs, start_time)
+
+        metrics = None
+        if self.control.should_evaluate:
+            metrics = self._evaluate(trial, ignore_keys_for_eval)
+            is_new_best_metric = self._determine_best_metric(metrics=metrics, trial=trial)
+
+            if self.args.save_strategy == "best":
+                self.control.should_save = is_new_best_metric
+
+        if self.control.should_save:
+            self._save_checkpoint(model, trial)
+            self.control = self.callback_handler.on_save(self.args, self.state, self.control)
+
+    # Ensure the model card is saved along with the checkpoint
+    def _save_checkpoint(self, model, trial):
+        if self.args.hub_model_id is None:
+            model_name = Path(self.args.output_dir).name
+        else:
+            model_name = self.args.hub_model_id.split("/")[-1]
+        self.create_model_card(model_name=model_name)
+        super()._save_checkpoint(model, trial)
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        citation = textwrap.dedent("""\
+        @article{guo2024direct,
+            title        = {{Direct Language Model Alignment from Online AI Feedback}},
+            author       = {Shangmin Guo and Biao Zhang and Tianlin Liu and Tianqi Liu and Misha Khalman and Felipe Llinares and Alexandre Ram{\'{e}} and Thomas Mesnard and Yao Zhao and Bilal Piot and Johan Ferret and Mathieu Blondel},
+            year         = 2024,
+            eprint       = {arXiv:2402.04792}
+        }""")
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="Online DPO",
+            trainer_citation=citation,
+            paper_title="Direct Language Model Alignment from Online AI Feedback",
+            paper_id="2402.04792",
+        )
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothOnlineDPOTrainer(_UnslothOnlineDPOTrainer):
+    """
+    
+    Initialize OnlineDPOTrainer.
+
+    Args:
+        model (`Union[str, nn.Module, PreTrainedModel]`):
+            Model to be trained. Can be either:
+
+            - A string, being the *model id* of a pretrained model hosted inside a model repo on huggingface.co, or a
+              path to a *directory* containing model weights saved using
+              [`~transformers.PreTrainedModel.save_pretrained`], e.g., `'./my_model_directory/'`. The model is loaded
+              using [`~transformers.AutoModelForCausalLM.from_pretrained`] with the keyword arguments in
+              `args.model_init_kwargs`.
+            - A [`~transformers.PreTrainedModel`] object. Only causal language models are supported.
+        ref_model (`transformers.PreTrainedModel` or `torch.nn.Module` or `None`):
+            The reference model to use for training. If None is specified, the reference model will be created from the
+            model.
+        reward_model (`transformers.PreTrainedModel` or `torch.nn.Module` or `None`):
+            The reward model to score completions with, preferably an `AutoModelForSequenceClassification`.
+        judge (`BasePairwiseJudge`):
+            The judge to use for pairwise comparison of model completions.
+        args (`OnlineDPOConfig`):
+            The online DPO config arguments to use for training.
+        data_collator (`transformers.DataCollator`):
+            The data collator to use for training. If None is specified, the default data collator
+            (`DPODataCollatorWithPadding`) will be used which will pad the sequences to the maximum length of the
+            sequences in the batch, given a dataset of paired sequences.
+        train_dataset (`datasets.Dataset`):
+            The dataset to use for training.
+        eval_dataset (`datasets.Dataset`):
+            The dataset to use for evaluation.
+        processing_class ([`~transformers.PreTrainedTokenizerBase`], [`~transformers.BaseImageProcessor`], [`~transformers.FeatureExtractionMixin`] or [`~transformers.ProcessorMixin`], *optional*, defaults to `None`):
+            Processing class used to process the data. If provided, will be used to automatically process the inputs
+            for the model, and it will be saved along the model to make it easier to rerun an interrupted training or
+            reuse the fine-tuned model.
+        peft_config (`dict`):
+            The peft config to use for training.
+        compute_metrics (`Callable[[EvalPrediction], dict]`, *optional*):
+            The function to use to compute the metrics. Must take a `EvalPrediction` and return a dictionary string to
+            metric values.
+        callbacks (`list[transformers.TrainerCallback]`):
+            The callbacks to use for training.
+        optimizers (`tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR]`):
+            The optimizer and scheduler to use for training.
+        preprocess_logits_for_metrics (`Callable[[torch.Tensor, torch.Tensor], torch.Tensor]`):
+            The function to use to preprocess the logits before computing the metrics.
+    
+    """
+    def __init__(
+        self,
+        model,
+        ref_model = None,
+        reward_model = None,
+        judge = None,
+        args = None,
+        data_collator = None,
+        train_dataset = None,
+        eval_dataset = None,
+        processing_class = None,
+        reward_processing_class = None,
+        peft_config = None,
+        compute_metrics = None,
+        callbacks = None,
+        preprocess_logits_for_metrics = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothOnlineDPOConfig()
+        use_bf16 = getattr(args, 'bf16', False)
+        if type(use_bf16) is not bool: use_bf16 = False
+        use_fp16 = getattr(args, 'fp16', False)
+        if type(use_fp16) is not bool: use_fp16 = False
+        force_float32 = False
+        if os.environ.get('UNSLOTH_FORCE_FLOAT32', '0') == '1':
+            print('Unsloth: Switching to float32 training since model cannot work with float16')
+            force_float32 = True
+        mixed_precision_dtype = os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32')
+        dtype = getattr(model.config, 'torch_dtype', None)
+        if dtype is None: dtype = model.get_input_embeddings().dtype
+        from unsloth_zoo.utils import _get_dtype
+        dtype = _get_dtype(dtype)
+        float16 = dtype == torch.float16
+        if not force_float32 and (float16 and use_bf16): raise TypeError('Unsloth: Model is in float16 precision but you want to use bfloat16 precision. Set fp16 to `True` and bf16 to `False`')
+        if not force_float32 and (not float16 and use_fp16): raise TypeError('Unsloth: Model is in bfloat16 precision but you want to use float16 precision. Set fp16 to `False` and bf16 to `True`')
+        if force_float32:
+            args.fp16 = False
+            args.bf16 = False
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'no'
+        elif (not use_bf16 and not use_fp16) and mixed_precision_dtype == 'float32':
+            args.fp16 = float16
+            args.bf16 = not float16
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'fp16' if float16 else 'bf16'
+        if getattr(args, 'eval_dataset', None) is not None and getattr(args, 'eval_strategy', 'no') == 'no':
+            args.eval_strategy = 'steps'
+            if getattr(args, 'eval_steps', None) is None: args.eval_steps = 0.1
+        ga_steps = getattr(args, 'gradient_accumulation_steps', None)
+        if ga_steps is not None and ga_steps > 1:
+            from transformers import __version__ as transformers_version
+            if Version(transformers_version) <= Version('4.45.2'):
+                print('**** Unsloth: Please use our fixed gradient_accumulation_steps by updating transformers, TRL and Unsloth!\n'
+                      '`pip install --upgrade --no-cache-dir --force-reinstall --no-deps unsloth transformers trl unsloth_zoo`')
+        if getattr(args, 'eval_strategy', 'no') != 'no':
+            eval_bsz = getattr(args, 'per_device_eval_batch_size', 8)
+            if eval_bsz == 8 and args.per_device_train_batch_size < eval_bsz: args.per_device_eval_batch_size = args.per_device_train_batch_size
+            if getattr(args, 'eval_accumulation_steps', None) is None and ga_steps is not None: args.eval_accumulation_steps = ga_steps
+        fp16_full_eval = getattr(args, 'fp16_full_eval', False)
+        if type(fp16_full_eval) is not bool: fp16_full_eval = False
+        bf16_full_eval = getattr(args, 'bf16_full_eval', False)
+        if type(bf16_full_eval) is not bool: bf16_full_eval = False
+        if args.fp16 and bf16_full_eval: args.bf16_full_eval = False; args.fp16_full_eval = True
+        if args.bf16 and fp16_full_eval: args.bf16_full_eval = True; args.fp16_full_eval = False
+        if force_float32:
+            args.bf16_full_eval = False
+            args.fp16_full_eval = False
+        elif os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32') == 'bfloat16':
+            args.bf16_full_eval = True
+            args.fp16_full_eval = False
+        elif not bf16_full_eval and not fp16_full_eval:
+            args.bf16_full_eval = args.bf16
+            args.fp16_full_eval = args.fp16
+        _output_logits = False
+        if locals().get('compute_metrics', None) is not None: _output_logits = True
+        if locals().get('preprocess_logits_for_metrics', None) is not None: _output_logits = True
+        if _output_logits:
+            os.environ['UNSLOTH_RETURN_LOGITS'] = '1'
+        if 'max_seq_length' not in locals() and not hasattr(args, 'max_seq_length'):
+            pass
+        else:
+            model_max_seq_length = getattr(model, 'max_seq_length', None)
+            args_max_seq_length  = getattr(args,  'max_seq_length', None)
+            if args_max_seq_length is None and model_max_seq_length is not None:
+                max_seq_length = model.max_seq_length
+                if hasattr(args, 'max_seq_length'): args.max_seq_length = max_seq_length
+        if model is not None and hasattr(model, 'for_training'):
+            model.for_training()
+        if 'tokenizer' in locals() and hasattr(tokenizer, 'padding_side'): tokenizer.padding_side = 'right'
+        if 'processing_class' in locals():
+            if hasattr(processing_class, 'padding_side'): processing_class.padding_side = 'right'
+            if hasattr(processing_class, 'tokenizer') and hasattr(processing_class.tokenizer, 'padding_side'): processing_class.tokenizer.padding_side = 'right'
+        __tokenizer = processing_class if 'processing_class' in locals() else tokenizer
+        from unsloth_zoo.vision_utils import UnslothVisionDataCollator
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if isinstance(data_collator, DataCollatorForSeq2Seq) and 'labels' not in train_dataset.column_names:
+                data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False, mlm_probability = 0.0)
+            elif isinstance(data_collator, TransformersDataCollatorForLanguageModeling) and 'labels' in train_dataset.column_names:
+                data_collator = DataCollatorForSeq2Seq(__tokenizer)
+        else:
+            if hasattr(args, 'remove_unused_columns'): args.remove_unused_columns = False
+            if hasattr(args, 'dataset_text_field'): args.dataset_text_field = ''
+            if hasattr(args, 'dataset_kwargs'): args.dataset_kwargs = {'skip_prepare_dataset': True}
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if not hasattr(__tokenizer, 'pad') and hasattr(__tokenizer, 'tokenizer'):
+                if isinstance(data_collator, DataCollatorForSeq2Seq):
+                    data_collator = DataCollatorForSeq2Seq(__tokenizer.tokenizer)
+                else:
+                    data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False, mlm_probability = 0.0)
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('online_dpo_trainer', other_metrics)
+        
+        super().__init__(
+            model = model,
+            ref_model = ref_model,
+            reward_model = reward_model,
+            judge = judge,
+            args = args,
+            data_collator = data_collator,
+            train_dataset = train_dataset,
+            eval_dataset = eval_dataset,
+            processing_class = processing_class,
+            reward_processing_class = reward_processing_class,
+            peft_config = peft_config,
+            compute_metrics = compute_metrics,
+            callbacks = callbacks,
+            preprocess_logits_for_metrics = preprocess_logits_for_metrics,**kwargs)
+        if hasattr(self, 'neftune_hook_handle'):
+            self.neftune_hook_handle.remove()
+            if hasattr(self, 'neftune_hook_handle'): del self.neftune_hook_handle
+        if getattr(args, 'neftune_noise_alpha', None) is not None:
+            model.get_input_embeddings().neftune_noise_alpha = self.neftune_noise_alpha
+        pass
+        if hasattr(self, 'accelerator'):
+            scaler = self.accelerator.scaler
+            current_model = model
+            while hasattr(current_model, 'model'):
+                current_model.accelerator_scaler = scaler
+                current_model = current_model.model
+            current_model.accelerator_scaler = scaler
+        pass
+        
+pass

unsloth_compiled_cache/UnslothPPOTrainer.py

@@ -0,0 +1,1319 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.ppo_trainer import (Accelerator, BaseImageProcessor, CallbackHandler, DEFAULT_CALLBACKS, DEFAULT_PROGRESS_CALLBACK, DataCollatorWithPadding, DataLoader, Dataset, ExportableState, FeatureExtractionMixin, GenerationConfig, INVALID_LOGPROB, OnlineTrainerState, Optional, PPOConfig, PPOTrainer, Path, PeftConfig, PeftModel, PolicyAndValueWrapper, PreTrainedTokenizerBase, PrinterCallback, ProcessorMixin, Trainer, TrainerCallback, TrainerControl, Union, batch_generation, broadcast, contextmanager, create_reference_model, defaultdict, disable_dropout_in_model, empty_cache, exact_div, first_true_indices, forward, gather_object, gc, generate_model_card, get_comet_experiment_url, get_peft_model, get_reporting_integration_callbacks, get_reward, is_peft_available, is_rich_available, is_wandb_available, log_table_to_comet_experiment, masked_mean, masked_whiten, math, nn, np, nullcontext, os, pd, peft_module_casting_to_bf16, prepare_deepspeed, print_rich_table, selective_log_softmax, textwrap, time, torch, truncate_response, unwrap_model_for_generation, wandb, Optional, PeftModel, Trainer, is_peft_available, os, torch)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothPPOConfig(PPOConfig):
+    """
+    
+    Configuration class for the [`PPOTrainer`].
+
+    This class includes only the parameters that are specific to PPO training. For a full list of training arguments,
+    please refer to the [`~transformers.TrainingArguments`] and [`OnPolicyConfig`] documentation. Note that default
+    values in this class may differ from those in [`~transformers.TrainingArguments`].
+
+    Using [`~transformers.HfArgumentParser`] we can turn this class into
+    [argparse](https://docs.python.org/3/library/argparse#module-argparse) arguments that can be specified on the
+    command line.
+
+    Parameters:
+        exp_name (`str`, *optional*, defaults to `os.path.basename(__file__)[:-3]`):
+            Name of this experiment.
+        reward_model_path (`str`, *optional*, defaults to `"EleutherAI/pythia-160m"`):
+            Path to the reward model.
+        model_adapter_name (`str` or `None`, *optional*, defaults to `None`):
+            Name of the train target PEFT adapter, when using LoRA with multiple adapters.
+        ref_adapter_name (`str` or `None`, *optional*, defaults to `None`):
+            Name of the reference PEFT adapter, when using LoRA with multiple adapters.
+        num_ppo_epochs (`int`, *optional*, defaults to `4`):
+            Number of epochs to train.
+        whiten_rewards (`bool`, *optional*, defaults to `False`):
+            Whether to whiten the rewards.
+        kl_coef (`float`, *optional*, defaults to `0.05`):
+            KL coefficient.
+        kl_estimator (`Literal["k1", "k3"]`, *optional*, defaults to `"k1"`):
+            Which estimator for KL-Divergence to use from [Approximating KL
+            Divergence](http://joschu.net/blog/kl-approx.html). Defaults to "k1", a straightforward, unbiased
+            estimator. Can be set to "k3", an unbiased estimator with lower variance which "appears to be a strictly
+            better estimator". Cannot be set to "k2", as it is used for logging purposes.
+        cliprange (`float`, *optional*, defaults to `0.2`):
+            Clip range.
+        vf_coef (`float`, *optional*, defaults to `0.1`):
+            Value function coefficient.
+        cliprange_value (`float`, *optional*, defaults to `0.2`):
+            Clip range for the value function.
+        gamma (`float`, *optional*, defaults to `1.0`):
+            Discount factor.
+        lam (`float`, *optional*, defaults to `0.95`):
+            Lambda value for GAE.
+        ds3_gather_for_generation (`bool`, *optional*, defaults to `True`):
+            This setting applies to DeepSpeed ZeRO-3. If enabled, the policy model weights are gathered for generation,
+            improving generation speed. However, disabling this option allows training models that exceed the VRAM
+            capacity of a single GPU, albeit at the cost of slower generation.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    
+    def __init__(
+        self,
+        output_dir = None,
+        overwrite_output_dir = None,
+        do_train = False,
+        do_eval = False,
+        do_predict = False,
+        eval_strategy = 'no',
+        prediction_loss_only = False,
+        per_device_train_batch_size = 4,
+        per_device_eval_batch_size = 4,
+        per_gpu_train_batch_size = None,
+        per_gpu_eval_batch_size = None,
+        gradient_accumulation_steps = 2,
+        eval_accumulation_steps = 2,
+        eval_delay = 0,
+        torch_empty_cache_steps = 250,
+        learning_rate = 5e-05,
+        weight_decay = 0.01,
+        adam_beta1 = 0.9,
+        adam_beta2 = 0.999,
+        adam_epsilon = 1e-08,
+        max_grad_norm = 1.0,
+        num_train_epochs = 3.0,
+        max_steps = -1,
+        lr_scheduler_type = 'linear',
+        warmup_ratio = 0.1,
+        warmup_steps = 0,
+        log_level = 'passive',
+        log_level_replica = 'warning',
+        log_on_each_node = True,
+        logging_dir = None,
+        logging_strategy = 'steps',
+        logging_first_step = False,
+        logging_steps = 1,
+        logging_nan_inf_filter = False,
+        save_strategy = 'steps',
+        save_steps = 500,
+        save_total_limit = None,
+        save_safetensors = True,
+        save_on_each_node = False,
+        save_only_model = False,
+        restore_callback_states_from_checkpoint = False,
+        no_cuda = False,
+        use_cpu = False,
+        use_mps_device = False,
+        seed = 3407,
+        data_seed = 3407,
+        jit_mode_eval = False,
+        use_ipex = False,
+        bf16 = False,
+        fp16 = False,
+        fp16_opt_level = 'O1',
+        half_precision_backend = 'auto',
+        bf16_full_eval = False,
+        fp16_full_eval = False,
+        tf32 = None,
+        local_rank = -1,
+        ddp_backend = None,
+        tpu_num_cores = None,
+        tpu_metrics_debug = False,
+        debug = '',
+        dataloader_drop_last = False,
+        eval_steps = None,
+        dataloader_num_workers = 0,
+        dataloader_prefetch_factor = None,
+        past_index = -1,
+        run_name = None,
+        disable_tqdm = None,
+        remove_unused_columns = True,
+        label_names = None,
+        load_best_model_at_end = False,
+        metric_for_best_model = None,
+        greater_is_better = None,
+        ignore_data_skip = False,
+        fsdp = '',
+        fsdp_min_num_params = 0,
+        fsdp_config = None,
+        fsdp_transformer_layer_cls_to_wrap = None,
+        accelerator_config = None,
+        deepspeed = None,
+        label_smoothing_factor = 0.0,
+        optim = 'adamw_8bit',
+        optim_args = None,
+        adafactor = False,
+        group_by_length = False,
+        length_column_name = 'length',
+        report_to = None,
+        ddp_find_unused_parameters = None,
+        ddp_bucket_cap_mb = None,
+        ddp_broadcast_buffers = None,
+        dataloader_pin_memory = True,
+        dataloader_persistent_workers = False,
+        skip_memory_metrics = True,
+        use_legacy_prediction_loop = False,
+        push_to_hub = False,
+        resume_from_checkpoint = None,
+        hub_model_id = None,
+        hub_strategy = 'every_save',
+        hub_token = None,
+        hub_private_repo = None,
+        hub_always_push = False,
+        hub_revision = None,
+        gradient_checkpointing = False,
+        gradient_checkpointing_kwargs = None,
+        include_inputs_for_metrics = False,
+        eval_do_concat_batches = True,
+        fp16_backend = 'auto',
+        push_to_hub_model_id = None,
+        push_to_hub_organization = None,
+        push_to_hub_token = None,
+        mp_parameters = '',
+        auto_find_batch_size = True,
+        full_determinism = False,
+        torchdynamo = None,
+        ray_scope = 'last',
+        ddp_timeout = 1800,
+        torch_compile = False,
+        torch_compile_backend = None,
+        torch_compile_mode = None,
+        include_tokens_per_second = False,
+        include_num_input_tokens_seen = False,
+        neftune_noise_alpha = None,
+        optim_target_modules = None,
+        batch_eval_metrics = False,
+        eval_on_start = False,
+        use_liger_kernel = False,
+        liger_kernel_config = None,
+        eval_use_gather_object = False,
+        average_tokens_across_devices = True,
+        dataset_num_proc = None,
+        num_mini_batches = 1,
+        total_episodes = None,
+        local_rollout_forward_batch_size = 64,
+        num_sample_generations = 10,
+        response_length = 53,
+        stop_token = None,
+        stop_token_id = None,
+        temperature = 0.7,
+        missing_eos_penalty = None,
+        sft_model_path = 'EleutherAI/pythia-160m',
+        world_size = None,
+        num_total_batches = None,
+        micro_batch_size = None,
+        local_batch_size = None,
+        batch_size = None,
+        local_mini_batch_size = None,
+        mini_batch_size = None,
+        exp_name = 'ppo_config',
+        reward_model_path = 'EleutherAI/pythia-160m',
+        model_adapter_name = None,
+        ref_adapter_name = None,
+        num_ppo_epochs = 4,
+        whiten_rewards = False,
+        kl_coef = 0.05,
+        kl_estimator = 'k1',
+        cliprange = 0.2,
+        vf_coef = 0.1,
+        cliprange_value = 0.2,
+        gamma = 1.0,
+        lam = 0.95,
+        ds3_gather_for_generation = True,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        
+        **kwargs,
+    ):
+        if learning_rate < 1e-7: raise FloatingPointError(f'Unsloth: Your learning rate of `{learning_rate}` is too small and less than 1e-7! Consider increasing it, otherwise gradient updates will be close to 0!')
+        if learning_rate > 1: raise OverflowError(f'Unsloth: Your learning rate of `{learning_rate}` is way too larger > 1! Consider decreasing it to 1e-1, otherwise gradient updates will explode!')
+        if output_dir is None and save_strategy == 'steps' and save_steps == 500:
+            output_dir = 'unsloth_training_checkpoints'
+            save_strategy = 'no'
+        if dataset_num_proc is None:
+            from multiprocessing import cpu_count
+            dataset_num_proc = min(cpu_count()*2, 2)
+        if temperature <= 0:
+            raise MathError('Unsloth: Please set a positive non-zero temperature since your results will be wrong.')
+        elif temperature >= 10:
+            raise MathError('Unsloth: Please set a positive non-zero temperature less than 10, since sampling will be quite erratic.')
+        
+        
+        super().__init__(
+            output_dir = output_dir,
+            overwrite_output_dir = overwrite_output_dir,
+            do_train = do_train,
+            do_eval = do_eval,
+            do_predict = do_predict,
+            eval_strategy = eval_strategy,
+            prediction_loss_only = prediction_loss_only,
+            per_device_train_batch_size = per_device_train_batch_size,
+            per_device_eval_batch_size = per_device_eval_batch_size,
+            per_gpu_train_batch_size = per_gpu_train_batch_size,
+            per_gpu_eval_batch_size = per_gpu_eval_batch_size,
+            gradient_accumulation_steps = gradient_accumulation_steps,
+            eval_accumulation_steps = eval_accumulation_steps,
+            eval_delay = eval_delay,
+            torch_empty_cache_steps = torch_empty_cache_steps,
+            learning_rate = learning_rate,
+            weight_decay = weight_decay,
+            adam_beta1 = adam_beta1,
+            adam_beta2 = adam_beta2,
+            adam_epsilon = adam_epsilon,
+            max_grad_norm = max_grad_norm,
+            num_train_epochs = num_train_epochs,
+            max_steps = max_steps,
+            lr_scheduler_type = lr_scheduler_type,
+            warmup_ratio = warmup_ratio,
+            warmup_steps = warmup_steps,
+            log_level = log_level,
+            log_level_replica = log_level_replica,
+            log_on_each_node = log_on_each_node,
+            logging_dir = logging_dir,
+            logging_strategy = logging_strategy,
+            logging_first_step = logging_first_step,
+            logging_steps = logging_steps,
+            logging_nan_inf_filter = logging_nan_inf_filter,
+            save_strategy = save_strategy,
+            save_steps = save_steps,
+            save_total_limit = save_total_limit,
+            save_safetensors = save_safetensors,
+            save_on_each_node = save_on_each_node,
+            save_only_model = save_only_model,
+            restore_callback_states_from_checkpoint = restore_callback_states_from_checkpoint,
+            no_cuda = no_cuda,
+            use_cpu = use_cpu,
+            use_mps_device = use_mps_device,
+            seed = seed,
+            data_seed = data_seed,
+            jit_mode_eval = jit_mode_eval,
+            use_ipex = use_ipex,
+            bf16 = bf16,
+            fp16 = fp16,
+            fp16_opt_level = fp16_opt_level,
+            half_precision_backend = half_precision_backend,
+            bf16_full_eval = bf16_full_eval,
+            fp16_full_eval = fp16_full_eval,
+            tf32 = tf32,
+            local_rank = local_rank,
+            ddp_backend = ddp_backend,
+            tpu_num_cores = tpu_num_cores,
+            tpu_metrics_debug = tpu_metrics_debug,
+            debug = debug,
+            dataloader_drop_last = dataloader_drop_last,
+            eval_steps = eval_steps,
+            dataloader_num_workers = dataloader_num_workers,
+            dataloader_prefetch_factor = dataloader_prefetch_factor,
+            past_index = past_index,
+            run_name = run_name,
+            disable_tqdm = disable_tqdm,
+            remove_unused_columns = remove_unused_columns,
+            label_names = label_names,
+            load_best_model_at_end = load_best_model_at_end,
+            metric_for_best_model = metric_for_best_model,
+            greater_is_better = greater_is_better,
+            ignore_data_skip = ignore_data_skip,
+            fsdp = fsdp,
+            fsdp_min_num_params = fsdp_min_num_params,
+            fsdp_config = fsdp_config,
+            fsdp_transformer_layer_cls_to_wrap = fsdp_transformer_layer_cls_to_wrap,
+            accelerator_config = accelerator_config,
+            deepspeed = deepspeed,
+            label_smoothing_factor = label_smoothing_factor,
+            optim = optim,
+            optim_args = optim_args,
+            adafactor = adafactor,
+            group_by_length = group_by_length,
+            length_column_name = length_column_name,
+            report_to = report_to,
+            ddp_find_unused_parameters = ddp_find_unused_parameters,
+            ddp_bucket_cap_mb = ddp_bucket_cap_mb,
+            ddp_broadcast_buffers = ddp_broadcast_buffers,
+            dataloader_pin_memory = dataloader_pin_memory,
+            dataloader_persistent_workers = dataloader_persistent_workers,
+            skip_memory_metrics = skip_memory_metrics,
+            use_legacy_prediction_loop = use_legacy_prediction_loop,
+            push_to_hub = push_to_hub,
+            resume_from_checkpoint = resume_from_checkpoint,
+            hub_model_id = hub_model_id,
+            hub_strategy = hub_strategy,
+            hub_token = hub_token,
+            hub_private_repo = hub_private_repo,
+            hub_always_push = hub_always_push,
+            hub_revision = hub_revision,
+            gradient_checkpointing = gradient_checkpointing,
+            gradient_checkpointing_kwargs = gradient_checkpointing_kwargs,
+            include_inputs_for_metrics = include_inputs_for_metrics,
+            eval_do_concat_batches = eval_do_concat_batches,
+            fp16_backend = fp16_backend,
+            push_to_hub_model_id = push_to_hub_model_id,
+            push_to_hub_organization = push_to_hub_organization,
+            push_to_hub_token = push_to_hub_token,
+            mp_parameters = mp_parameters,
+            auto_find_batch_size = auto_find_batch_size,
+            full_determinism = full_determinism,
+            torchdynamo = torchdynamo,
+            ray_scope = ray_scope,
+            ddp_timeout = ddp_timeout,
+            torch_compile = torch_compile,
+            torch_compile_backend = torch_compile_backend,
+            torch_compile_mode = torch_compile_mode,
+            include_tokens_per_second = include_tokens_per_second,
+            include_num_input_tokens_seen = include_num_input_tokens_seen,
+            neftune_noise_alpha = neftune_noise_alpha,
+            optim_target_modules = optim_target_modules,
+            batch_eval_metrics = batch_eval_metrics,
+            eval_on_start = eval_on_start,
+            use_liger_kernel = use_liger_kernel,
+            liger_kernel_config = liger_kernel_config,
+            eval_use_gather_object = eval_use_gather_object,
+            average_tokens_across_devices = average_tokens_across_devices,
+            dataset_num_proc = dataset_num_proc,
+            num_mini_batches = num_mini_batches,
+            total_episodes = total_episodes,
+            local_rollout_forward_batch_size = local_rollout_forward_batch_size,
+            num_sample_generations = num_sample_generations,
+            response_length = response_length,
+            stop_token = stop_token,
+            stop_token_id = stop_token_id,
+            temperature = temperature,
+            missing_eos_penalty = missing_eos_penalty,
+            sft_model_path = sft_model_path,
+            world_size = world_size,
+            num_total_batches = num_total_batches,
+            micro_batch_size = micro_batch_size,
+            local_batch_size = local_batch_size,
+            batch_size = batch_size,
+            local_mini_batch_size = local_mini_batch_size,
+            mini_batch_size = mini_batch_size,
+            exp_name = exp_name,
+            reward_model_path = reward_model_path,
+            model_adapter_name = model_adapter_name,
+            ref_adapter_name = ref_adapter_name,
+            num_ppo_epochs = num_ppo_epochs,
+            whiten_rewards = whiten_rewards,
+            kl_coef = kl_coef,
+            kl_estimator = kl_estimator,
+            cliprange = cliprange,
+            vf_coef = vf_coef,
+            cliprange_value = cliprange_value,
+            gamma = gamma,
+            lam = lam,
+            ds3_gather_for_generation = ds3_gather_for_generation,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        
+pass
+
+class _UnslothPPOTrainer(Trainer):
+    _tag_names = ["trl", "ppo"]
+
+    def __init__(
+        self,
+        args: PPOConfig,
+        processing_class: Optional[
+            Union[PreTrainedTokenizerBase, BaseImageProcessor, FeatureExtractionMixin, ProcessorMixin]
+        ],
+        model: nn.Module,
+        ref_model: Optional[nn.Module],
+        reward_model: nn.Module,
+        train_dataset: Dataset,
+        value_model: nn.Module,
+        data_collator: Optional[DataCollatorWithPadding] = None,
+        eval_dataset: Optional[Union[Dataset, dict[str, Dataset]]] = None,
+        # less commonly used
+        optimizers: tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR] = (None, None),
+        callbacks: Optional[list[TrainerCallback]] = None,
+        peft_config: Optional["PeftConfig"] = None,
+    ) -> None:
+        if ref_model is model:
+            raise ValueError(
+                "`model` and `ref_model` cannot be the same object. If you want `ref_model` to be the "
+                "same as `model`, you must make a copy of it, or `None` if you use peft."
+            )
+
+        self.args = args
+        self.processing_class = processing_class
+        self.policy_model = model
+
+        # Define the collator if not provided
+        if data_collator is None:
+            data_collator = DataCollatorWithPadding(self.processing_class)
+
+        # Handle stop token settings: update policy model's generation_config to use provided stop token
+        if args.stop_token and args.stop_token_id:
+            raise ValueError("You cannot set both `stop_token` and `stop_token_id`.")
+        elif args.stop_token:
+            if args.stop_token == "eos":
+                self.policy_model.generation_config.eos_token_id = self.stop_token_id = processing_class.eos_token_id
+            else:
+                raise ValueError(
+                    f"Unknown `stop_token` {args.stop_token}. Allowed values are: `'eos'` and `None` (no stop token)."
+                )
+        else:
+            self.policy_model.generation_config.eos_token_id = self.stop_token_id = args.stop_token_id  # None or int
+
+        # Check that the kl estimator is valid
+        if self.args.kl_estimator not in {"k1", "k3"}:
+            raise ValueError(
+                "kl_estimator must be either 'k1' (straightforward, unbiased) or 'k3' (lower variance, unbiased, "
+                "appears to be a strictly better estimator). See "
+                "[Approximating KL Divergence](http://joschu.net/blog/kl-approx.html) for details."
+            )
+
+        # peft support
+        if not is_peft_available() and peft_config is not None:
+            raise ImportError(
+                "PEFT is not installed and you passed a `peft_config` in the trainer's kwargs, please install it to use the PEFT models"
+            )
+        elif is_peft_available() and peft_config is not None:
+            # if model is a peft model and we have a peft_confg, we merge and unload it first
+            if isinstance(self.policy_model, PeftModel):
+                self.policy_model = self.policy_model.merge_and_unload()
+
+            # get peft model with the given config
+            self.policy_model = get_peft_model(self.policy_model, peft_config)
+            if args.bf16 and getattr(self.policy_model, "is_loaded_in_4bit", False):
+                peft_module_casting_to_bf16(self.policy_model)
+
+        self.is_peft_model = is_peft_available() and isinstance(self.policy_model, PeftModel)
+        self.model_adapter_name = args.model_adapter_name
+        self.ref_adapter_name = args.ref_adapter_name
+
+        if ref_model:
+            self.ref_model = ref_model
+        elif self.is_peft_model:
+            self.ref_model = None
+        else:
+            self.ref_model = create_reference_model(self.policy_model)
+
+        self.reward_model = reward_model
+        self.train_dataset = train_dataset
+        self.train_dataset_len = len(train_dataset)
+        self.value_model = value_model
+        self.data_collator = data_collator
+        self.eval_dataset = eval_dataset
+        self.optimizer, self.lr_scheduler = optimizers
+        self.optimizer_cls_and_kwargs = None  # needed for transformers >= 4.47
+
+        #########
+        # calculate various batch sizes
+        #########
+        if args.total_episodes is None:  # allow the users to define episodes in terms of epochs.
+            args.total_episodes = int(args.num_train_epochs * self.train_dataset_len)
+        accelerator = Accelerator(gradient_accumulation_steps=args.gradient_accumulation_steps)
+        self.accelerator = accelerator
+        args.world_size = accelerator.num_processes
+        args.local_batch_size = args.per_device_train_batch_size * args.gradient_accumulation_steps
+        args.micro_batch_size = int(args.per_device_train_batch_size * args.world_size)
+        args.batch_size = int(args.local_batch_size * args.world_size)
+        args.mini_batch_size = exact_div(
+            args.batch_size, args.num_mini_batches, "`batch_size` must be a multiple of `num_mini_batches`"
+        )
+        args.local_mini_batch_size = exact_div(
+            args.local_batch_size, args.num_mini_batches, "`local_batch_size` must be a multiple of `num_mini_batches`"
+        )
+        if args.whiten_rewards:
+            assert args.local_mini_batch_size >= 8, (
+                f"Per-rank minibatch size {args.local_mini_batch_size} is insufficient for whitening"
+            )
+        # `per_rank_rollout_batch_size` is our `args.local_batch_size`
+        # `per_rank_minibatch_size` is our `args.local_mini_batch_size`
+        args.num_total_batches = math.ceil(
+            args.total_episodes / args.batch_size
+        )  # we may train for more than `total_episodes`
+        time_tensor = torch.tensor(int(time.time()), device=accelerator.device)
+        time_int = broadcast(time_tensor, 0).item()  # avoid different timestamps across processes
+        args.run_name = f"{args.exp_name}__{args.seed}__{time_int}"
+        self.local_seed = args.seed + accelerator.process_index * 100003  # Prime
+        if args.num_sample_generations > 0:
+            self.sample_generations_freq = max(1, args.num_total_batches // args.num_sample_generations)
+        self.local_dataloader_batch_size = args.local_batch_size
+
+        #########
+        # setup model, optimizer, and others
+        #########
+        for module in [self.policy_model, self.ref_model, self.value_model, self.reward_model]:
+            if module is not None:
+                disable_dropout_in_model(module)
+        self.model = PolicyAndValueWrapper(self.policy_model, self.value_model)
+        self.model.config = self.policy_model.config  # needed for pushing to hub
+        self.create_optimizer_and_scheduler(
+            num_training_steps=args.num_total_batches
+        )  # note that we are calling `self.lr_scheduler.step[]` manually only at the batch level
+
+        #########
+        ### trainer specifics
+        #########
+        default_callbacks = DEFAULT_CALLBACKS + get_reporting_integration_callbacks(self.args.report_to)
+        self.callbacks = default_callbacks if callbacks is None else default_callbacks + callbacks
+        self.callback_handler = CallbackHandler(
+            self.callbacks, self.model, self.processing_class, self.optimizer, self.lr_scheduler
+        )
+        self.add_callback(PrinterCallback if self.args.disable_tqdm else DEFAULT_PROGRESS_CALLBACK)
+        self.control = TrainerControl()
+        self.state = OnlineTrainerState(
+            is_local_process_zero=self.is_local_process_zero(),
+            is_world_process_zero=self.is_world_process_zero(),
+            stateful_callbacks=[
+                cb for cb in self.callback_handler.callbacks + [self.control] if isinstance(cb, ExportableState)
+            ],
+        )
+        self.current_flos = 0
+        self.hp_search_backend = None
+        self.is_deepspeed_enabled = getattr(self.accelerator.state, "deepspeed_plugin", None) is not None
+        self.is_fsdp_enabled = getattr(self.accelerator.state, "fsdp_plugin", None) is not None
+        # Create distant repo and output directory if needed
+        self.hub_model_id = None
+        if self.args.push_to_hub:
+            self.init_hf_repo()
+        if self.args.should_save:
+            os.makedirs(self.args.output_dir, exist_ok=True)
+
+        # Add tags for models that have been loaded with the correct transformers version
+        if hasattr(self.model, "add_model_tags"):
+            self.model.add_model_tags(self._tag_names)
+
+        #########
+        ### setup dataloader
+        #########
+        self.dataloader = DataLoader(
+            self.train_dataset,
+            batch_size=self.local_dataloader_batch_size,
+            shuffle=True,
+            collate_fn=self.data_collator,
+            drop_last=True,  # needed; otherwise the last batch will be of ragged shape
+        )
+        # sync random states for DataLoader[shuffle=True] before `accelerator.prepare`
+        # see https://gist.github.com/vwxyzjn/2581bff1e48e185e0b85b6dfe1def79c
+        torch.manual_seed(args.seed)
+        self.model, self.optimizer, self.dataloader = accelerator.prepare(self.model, self.optimizer, self.dataloader)
+        torch.manual_seed(self.local_seed)  # reset the local seed again
+
+        self.eval_dataloader = DataLoader(
+            self.eval_dataset,
+            batch_size=args.per_device_eval_batch_size,
+            collate_fn=self.data_collator,
+            drop_last=True,
+        )  # no need to shuffle eval dataset
+        self.eval_dataloader = accelerator.prepare(self.eval_dataloader)
+
+        if self.is_deepspeed_enabled:
+            self.reward_model = prepare_deepspeed(
+                self.reward_model, args.per_device_train_batch_size, args.fp16, args.bf16
+            )
+
+            if self.ref_model is None:
+                if not self.is_peft_model:
+                    raise ValueError("No reference model and model is not a Peft model.")
+            else:
+                self.ref_model = prepare_deepspeed(
+                    self.ref_model, args.per_device_train_batch_size, args.fp16, args.bf16
+                )
+        else:
+            if self.ref_model is None:
+                if not self.is_peft_model:
+                    raise ValueError("No reference model and model is not a Peft model.")
+            else:
+                self.ref_model = self.ref_model.to(self.accelerator.device)
+            self.reward_model = self.reward_model.to(self.accelerator.device)
+
+    def get_train_dataloader(self) -> DataLoader:
+        return self.dataloader
+
+    def get_eval_dataloader(self) -> DataLoader:
+        return self.eval_dataloader
+
+    @contextmanager
+    def null_ref_context(self):
+        """Context manager for handling null reference model (that is, peft adapter manipulation)."""
+        with (
+            self.accelerator.unwrap_model(self.model.policy).disable_adapter()
+            if self.is_peft_model and not self.ref_adapter_name
+            else nullcontext()
+        ):
+            if self.ref_adapter_name:
+                self.model.policy.set_adapter(self.ref_adapter_name)
+            yield
+            if self.ref_adapter_name:
+                self.model.policy.set_adapter(self.model_adapter_name or "default")
+
+    def save_model(self, output_dir: Optional[str] = None, _internal_call: bool = False):
+        backup_model = self.model
+        self.model = self.model.policy  # save only the policy
+
+        if self.is_deepspeed_enabled:
+            backup_deepspeed = self.deepspeed
+            self.deepspeed = self.model
+
+        super().save_model(output_dir, _internal_call)
+
+        self.model = backup_model
+
+        if self.is_deepspeed_enabled:
+            self.deepspeed = backup_deepspeed
+
+    def train(self):
+        args = self.args
+        accelerator = self.accelerator
+        optimizer = self.optimizer
+        model = self.model
+        ref_policy = self.ref_model
+        reward_model = self.reward_model
+        processing_class = self.processing_class
+        dataloader = self.dataloader
+        device = accelerator.device
+
+        def repeat_generator():
+            while True:
+                yield from dataloader
+
+        iter_dataloader = iter(repeat_generator())
+        generation_config = GenerationConfig(
+            max_new_tokens=args.response_length,
+            temperature=(args.temperature + 1e-7),
+            top_k=0.0,
+            top_p=1.0,
+            do_sample=True,
+        )
+
+        accelerator.print("===training policy===")
+        start_time = time.time()
+        stats_shape = (args.num_ppo_epochs, args.num_mini_batches, args.gradient_accumulation_steps)
+        approxkl_stats = torch.zeros(stats_shape, device=device)
+        pg_clipfrac_stats = torch.zeros(stats_shape, device=device)
+        pg_loss_stats = torch.zeros(stats_shape, device=device)
+        vf_loss_stats = torch.zeros(stats_shape, device=device)
+        vf_clipfrac_stats = torch.zeros(stats_shape, device=device)
+        entropy_stats = torch.zeros(stats_shape, device=device)
+        ratio_stats = torch.zeros(stats_shape, device=device)
+        model.train()
+
+        # trainer state initialization
+        self.state.global_step = 0
+        self.state.episode = 0
+        self.state.max_steps = args.num_total_batches
+        self.state.num_train_epochs = args.total_episodes / self.train_dataset_len
+        # Compute absolute values for logging, eval, and save if given as ratio
+        if args.logging_steps is not None:
+            if args.logging_steps < 1:
+                self.state.logging_steps = math.ceil(self.state.max_steps * args.logging_steps)
+            else:
+                self.state.logging_steps = args.logging_steps
+        if args.eval_steps is not None:
+            if args.eval_steps < 1:
+                self.state.eval_steps = math.ceil(self.state.max_steps * args.eval_steps)
+            else:
+                self.state.eval_steps = args.eval_steps
+        if args.save_steps is not None:
+            if args.save_steps < 1:
+                self.state.save_steps = math.ceil(self.state.max_steps * args.save_steps)
+            else:
+                self.state.save_steps = args.save_steps
+        self.control = self.callback_handler.on_train_begin(args, self.state, self.control)
+
+        # backward compatibility
+        if self.is_deepspeed_enabled:
+            self.deepspeed = self.model
+            self.model_wrapped = self.model
+
+        for update in range(1, args.num_total_batches + 1):
+            self.state.episode += 1 * args.batch_size
+            data = next(iter_dataloader)
+            with torch.no_grad():
+                queries = data["input_ids"].to(device)
+                context_length = queries.shape[1]
+                responses = []
+                postprocessed_responses = []
+                logprobs = []
+                ref_logprobs = []
+                scores = []
+                sequence_lengths = []
+                values = []
+                with unwrap_model_for_generation(
+                    self.model, self.accelerator, gather_deepspeed3_params=self.args.ds3_gather_for_generation
+                ) as unwrapped_model:
+                    query_responses, logitss = batch_generation(
+                        unwrapped_model.policy,
+                        queries,
+                        args.local_rollout_forward_batch_size,
+                        processing_class.pad_token_id,
+                        generation_config,
+                    )
+
+                for i in range(0, queries.shape[0], args.local_rollout_forward_batch_size):
+                    query = queries[i : i + args.local_rollout_forward_batch_size]
+                    query_response = query_responses[i : i + args.local_rollout_forward_batch_size]
+                    response = query_response[:, context_length:]
+                    logits = logitss[i : i + args.local_rollout_forward_batch_size]
+                    logprob = selective_log_softmax(logits, response)
+                    del logits
+                    empty_cache()
+
+                    if ref_policy is None:
+                        with self.null_ref_context():
+                            ref_output = forward(model.policy, query_response, processing_class.pad_token_id)
+                    else:
+                        ref_output = forward(ref_policy, query_response, processing_class.pad_token_id)
+                    ref_logits = ref_output.logits[:, context_length - 1 : -1]
+                    ref_logits /= args.temperature + 1e-7
+                    ref_logprob = selective_log_softmax(ref_logits, response)
+                    del ref_output, ref_logits
+                    empty_cache()
+
+                    # Response Processing 1. truncate response after the first occurrence of `stop_token_id`
+                    postprocessed_response = response
+                    if self.stop_token_id is not None:  # handle the edge case when stop_token_id exists but is 0
+                        postprocessed_response = truncate_response(
+                            self.stop_token_id, processing_class.pad_token_id, response
+                        )
+
+                    # Response Processing 2. run reward model on the truncated responses
+                    postprocessed_query_response = torch.cat((query, postprocessed_response), 1)
+                    sequence_length = first_true_indices(postprocessed_response == processing_class.pad_token_id) - 1
+                    unwrapped_value_model = accelerator.unwrap_model(model).value_model
+                    full_value, _, _ = get_reward(
+                        unwrapped_value_model, query_response, processing_class.pad_token_id, context_length
+                    )
+                    value = full_value[:, context_length - 1 : -1].squeeze(-1)
+                    _, score, _ = get_reward(
+                        reward_model, postprocessed_query_response, processing_class.pad_token_id, context_length
+                    )
+
+                    responses.append(response)
+                    postprocessed_responses.append(postprocessed_response)
+                    logprobs.append(logprob)
+                    ref_logprobs.append(ref_logprob)
+                    sequence_lengths.append(sequence_length)
+                    scores.append(score)
+                    values.append(value)
+                responses = torch.cat(responses, 0)
+                postprocessed_responses = torch.cat(postprocessed_responses, 0)
+                logprobs = torch.cat(logprobs, 0)
+                ref_logprobs = torch.cat(ref_logprobs, 0)
+                sequence_lengths = torch.cat(sequence_lengths, 0)
+                scores = torch.cat(scores, 0)
+                values = torch.cat(values, 0)
+                del (logprob, ref_logprob, full_value, value, score, unwrapped_model)
+                empty_cache()
+                gc.collect()
+
+                # Response Processing 3. Filter completion. Ensure that the sample contains stop_token_id
+                # Completions not passing that filter will receive a lower score.
+                contain_eos_token = torch.any(postprocessed_responses == self.processing_class.eos_token_id, dim=-1)
+                if self.args.missing_eos_penalty is not None:
+                    scores[~contain_eos_token] -= self.args.missing_eos_penalty
+                # accelerator.print(f"{scores=}, {(contain_eos_token.sum() / len(contain_eos_token))=}")
+
+                # be very careful with `padding_mask_p1`; see https://excalidraw.com/#json=LWnzG4w2k5DjF_EOL_xPt,e2w3a-hFJ_gX5vOfeyXGTw
+                response_idxs = torch.arange(responses.shape[1], device=responses.device).repeat(responses.shape[0], 1)
+                padding_mask = response_idxs > sequence_lengths.unsqueeze(1)
+                logprobs = torch.masked_fill(logprobs, padding_mask, INVALID_LOGPROB)
+                ref_logprobs = torch.masked_fill(ref_logprobs, padding_mask, INVALID_LOGPROB)
+                sequence_lengths_p1 = sequence_lengths + 1
+                padding_mask_p1 = response_idxs > (sequence_lengths_p1.unsqueeze(1))
+                values = torch.masked_fill(values, padding_mask_p1, 0)
+
+                # 4. compute rewards
+                # Formula used by http://joschu.net/blog/kl-approx.html for the k1 and k3 estimators
+                logr = ref_logprobs - logprobs
+                kl = -logr if args.kl_estimator == "k1" else (logr.exp() - 1) - logr  # Else statement is k3
+                non_score_reward = -args.kl_coef * kl
+                rewards = non_score_reward.clone()
+                actual_start = torch.arange(rewards.size(0), device=rewards.device)
+                actual_end = torch.where(sequence_lengths_p1 < rewards.size(1), sequence_lengths_p1, sequence_lengths)
+                rewards[[actual_start, actual_end]] += scores
+
+                # 5. whiten rewards
+                if args.whiten_rewards:
+                    rewards = masked_whiten(rewards, mask=~padding_mask_p1, shift_mean=False)
+                    rewards = torch.masked_fill(rewards, padding_mask_p1, 0)
+
+                # 6. compute advantages and returns
+                lastgaelam = 0
+                advantages_reversed = []
+                gen_length = responses.shape[1]
+                for t in reversed(range(gen_length)):
+                    nextvalues = values[:, t + 1] if t < gen_length - 1 else 0.0
+                    delta = rewards[:, t] + args.gamma * nextvalues - values[:, t]
+                    lastgaelam = delta + args.gamma * args.lam * lastgaelam
+                    advantages_reversed.append(lastgaelam)
+                advantages = torch.stack(advantages_reversed[::-1], axis=1)
+                returns = advantages + values
+                advantages = masked_whiten(advantages, ~padding_mask)
+                advantages = torch.masked_fill(advantages, padding_mask, 0)
+                empty_cache()
+
+            # Do multiple epochs of PPO training, with a fresh random shuffle in each epoch
+            for ppo_epoch_idx in range(args.num_ppo_epochs):
+                b_inds = np.random.permutation(args.local_batch_size)
+                minibatch_idx = 0
+                for mini_batch_start in range(0, args.local_batch_size, args.local_mini_batch_size):
+                    mini_batch_end = mini_batch_start + args.local_mini_batch_size
+                    mini_batch_inds = b_inds[mini_batch_start:mini_batch_end]
+                    gradient_accumulation_idx = 0
+                    for micro_batch_start in range(0, args.local_mini_batch_size, args.per_device_train_batch_size):
+                        with accelerator.accumulate(model):
+                            micro_batch_end = micro_batch_start + args.per_device_train_batch_size
+                            micro_batch_inds = mini_batch_inds[micro_batch_start:micro_batch_end]
+                            mb_advantage = advantages[micro_batch_inds]
+                            mb_responses = responses[micro_batch_inds]
+                            mb_query_responses = query_responses[micro_batch_inds]
+                            mb_logprobs = logprobs[micro_batch_inds]
+                            mb_return = returns[micro_batch_inds]
+                            mb_values = values[micro_batch_inds]
+
+                            output, vpred_temp = forward(model, mb_query_responses, processing_class.pad_token_id)
+                            logits = output.logits[:, context_length - 1 : -1]
+                            logits /= args.temperature + 1e-7
+                            new_logprobs = selective_log_softmax(logits, mb_responses)
+                            new_logprobs = torch.masked_fill(
+                                new_logprobs, padding_mask[micro_batch_inds], INVALID_LOGPROB
+                            )
+                            vpred = vpred_temp[:, context_length - 1 : -1].squeeze(-1)
+                            vpred = torch.masked_fill(vpred, padding_mask_p1[micro_batch_inds], 0)
+                            vpredclipped = torch.clamp(
+                                vpred,
+                                mb_values - args.cliprange_value,
+                                mb_values + args.cliprange_value,
+                            )
+                            vf_losses1 = torch.square(vpred - mb_return)
+                            vf_losses2 = torch.square(vpredclipped - mb_return)
+                            vf_loss_max = torch.max(vf_losses1, vf_losses2)
+                            vf_loss = 0.5 * masked_mean(vf_loss_max, ~padding_mask_p1[micro_batch_inds])
+                            vf_clipfrac = masked_mean(
+                                (vf_losses2 > vf_losses1).float(), ~padding_mask_p1[micro_batch_inds]
+                            )
+                            logprobs_diff = new_logprobs - mb_logprobs
+                            ratio = torch.exp(logprobs_diff)
+                            pg_losses = -mb_advantage * ratio
+                            pg_losses2 = -mb_advantage * torch.clamp(ratio, 1.0 - args.cliprange, 1.0 + args.cliprange)
+                            pg_loss_max = torch.max(pg_losses, pg_losses2)
+                            pg_loss = masked_mean(pg_loss_max, ~padding_mask[micro_batch_inds])
+                            loss = pg_loss + args.vf_coef * vf_loss
+                            accelerator.backward(loss)
+                            optimizer.step()
+                            optimizer.zero_grad()
+                            with torch.no_grad():
+                                pg_clipfrac = masked_mean(
+                                    (pg_losses2 > pg_losses).float(), ~padding_mask[micro_batch_inds]
+                                )
+                                prob_dist = torch.nn.functional.softmax(logits, dim=-1, dtype = torch.float32).to(logits.dtype)
+                                entropy = torch.logsumexp(logits, dim=-1) - torch.sum(prob_dist * logits, dim=-1)
+                                approxkl = 0.5 * (logprobs_diff**2).mean()
+                                approxkl_stats[ppo_epoch_idx, minibatch_idx, gradient_accumulation_idx] = approxkl
+                                pg_clipfrac_stats[ppo_epoch_idx, minibatch_idx, gradient_accumulation_idx] = (
+                                    pg_clipfrac
+                                )
+                                pg_loss_stats[ppo_epoch_idx, minibatch_idx, gradient_accumulation_idx] = pg_loss
+                                vf_loss_stats[ppo_epoch_idx, minibatch_idx, gradient_accumulation_idx] = vf_loss
+                                vf_clipfrac_stats[ppo_epoch_idx, minibatch_idx, gradient_accumulation_idx] = (
+                                    vf_clipfrac
+                                )
+                                entropy_stats[ppo_epoch_idx, minibatch_idx, gradient_accumulation_idx] = entropy.mean()
+                                ratio_stats[ppo_epoch_idx, minibatch_idx, gradient_accumulation_idx] = ratio.mean()
+                        gradient_accumulation_idx += 1
+                    minibatch_idx += 1
+                    # del everything and empty cache
+                    # fmt: off
+                    del (
+                        output, vpred_temp, logits, new_logprobs, vpred, vpredclipped,
+                        vf_losses1, vf_losses2, vf_loss, vf_clipfrac, logprobs_diff, ratio, pg_losses, pg_losses2, pg_loss_max,
+                        pg_loss, loss, pg_clipfrac, prob_dist, entropy, approxkl, mb_return,
+                        mb_advantage, mb_values, mb_responses, mb_query_responses, mb_logprobs,
+                    )
+                    # fmt: on
+                    empty_cache()
+            with torch.no_grad():
+                mean_kl = kl.sum(1).mean()
+                mean_entropy = (-logprobs).sum(1).mean()
+                mean_non_score_reward = non_score_reward.sum(1).mean()
+                rlhf_reward = mean_non_score_reward + scores.mean()
+                eps = int(self.state.episode / (time.time() - start_time))
+                metrics = {}
+                metrics["eps"] = eps
+                metrics["objective/kl"] = self.accelerator.gather_for_metrics(mean_kl).mean().item()
+                metrics["objective/entropy"] = self.accelerator.gather_for_metrics(mean_entropy).mean().item()
+                metrics["objective/non_score_reward"] = (
+                    self.accelerator.gather_for_metrics(mean_non_score_reward).mean().item()
+                )
+                metrics["objective/rlhf_reward"] = self.accelerator.gather_for_metrics(rlhf_reward).mean().item()
+                metrics["objective/scores"] = self.accelerator.gather_for_metrics(scores.mean()).mean().item()
+                metrics["policy/approxkl_avg"] = self.accelerator.gather_for_metrics(approxkl_stats).mean().item()
+                metrics["policy/clipfrac_avg"] = self.accelerator.gather_for_metrics(pg_clipfrac_stats).mean().item()
+                metrics["loss/policy_avg"] = self.accelerator.gather_for_metrics(pg_loss_stats).mean().item()
+                metrics["loss/value_avg"] = self.accelerator.gather_for_metrics(vf_loss_stats).mean().item()
+                metrics["val/clipfrac_avg"] = self.accelerator.gather_for_metrics(vf_clipfrac_stats).mean().item()
+                metrics["policy/entropy_avg"] = self.accelerator.gather_for_metrics(entropy_stats).mean().item()
+                metrics["val/ratio"] = self.accelerator.gather_for_metrics(ratio_stats).mean().item()
+                metrics["val/ratio_var"] = self.accelerator.gather_for_metrics(ratio_stats).var().item()
+                metrics["val/num_eos_tokens"] = (responses == processing_class.eos_token_id).sum().item()
+                metrics["lr"] = self.lr_scheduler.get_last_lr()[0]
+                metrics["episode"] = self.state.episode
+                self.state.epoch = self.state.episode / self.train_dataset_len  # used by self.log
+                self.state.global_step += 1
+                self.log(metrics)
+
+            self.lr_scheduler.step()
+            self.control = self.callback_handler.on_step_end(args, self.state, self.control)
+            if self.control.should_save:
+                self._save_checkpoint(model, trial=None)
+                self.control = self.callback_handler.on_save(self.args, self.state, self.control)
+            del kl, mean_kl, mean_entropy, mean_non_score_reward, scores, metrics, non_score_reward
+            empty_cache()
+            gc.collect()
+
+            if args.num_sample_generations > 0 and (update - 1) % self.sample_generations_freq == 0:
+                self.generate_completions(sampling=True)
+                empty_cache()
+            del (
+                query_responses,
+                responses,
+                postprocessed_responses,
+                logprobs,
+                ref_logprobs,
+                values,
+                sequence_lengths,
+                contain_eos_token,
+                sequence_lengths_p1,
+                response_idxs,
+                padding_mask,
+                padding_mask_p1,
+                rewards,
+                actual_start,
+                actual_end,
+                advantages,
+                returns,
+            )
+            empty_cache()
+
+        # HF trainer specifics
+        self.control = self.callback_handler.on_train_end(args, self.state, self.control)
+        if self.control.should_save:
+            self._save_checkpoint(model, trial=None, metrics=None)
+            self.control = self.callback_handler.on_save(self.args, self.state, self.control)
+
+    def generate_completions(self, sampling: bool = False):
+        args = self.args
+        processing_class = self.processing_class
+        generation_config = GenerationConfig(
+            max_new_tokens=self.args.response_length,
+            temperature=(0.01 + 1e-7),
+            top_k=0.0,
+            top_p=1.0,
+            do_sample=True,
+        )
+
+        table = defaultdict(list)
+        with unwrap_model_for_generation(
+            self.model, self.accelerator, gather_deepspeed3_params=self.args.ds3_gather_for_generation
+        ) as unwrapped_model:
+            for batch in self.eval_dataloader:
+                query = batch["input_ids"]
+                with torch.no_grad():
+                    context_length = query.shape[1]
+                    query_response, _ = batch_generation(
+                        unwrapped_model.policy,
+                        query,
+                        query.shape[0],
+                        processing_class.pad_token_id,
+                        generation_config,
+                    )
+                    response = query_response[:, context_length:]
+                    postprocessed_response = response
+                    if self.stop_token_id is not None:  # handle the edge case when stop_token_id exists but is 0
+                        postprocessed_response = truncate_response(
+                            self.stop_token_id, processing_class.pad_token_id, response
+                        )
+                    table["query"].extend(
+                        gather_object(processing_class.batch_decode(query, skip_special_tokens=True))
+                    )
+                    table["model response"].extend(
+                        gather_object(processing_class.batch_decode(postprocessed_response))
+                    )
+
+                    postprocessed_query_response = torch.cat((query, postprocessed_response), 1)
+                    _, score, _ = get_reward(
+                        self.reward_model, postprocessed_query_response, processing_class.pad_token_id, context_length
+                    )
+                    table["score"].extend(self.accelerator.gather_for_metrics(score).float().cpu().numpy())
+
+                if sampling:
+                    break
+        df = pd.DataFrame(table)
+
+        if self.accelerator.is_main_process:
+            if is_rich_available():
+                print_rich_table(df.iloc[0 : 0 + 5])
+            if "wandb" in args.report_to:
+                import wandb
+
+                if wandb.run is not None:
+                    wandb.log({"completions": wandb.Table(dataframe=df)})
+
+            if "comet_ml" in args.report_to:
+                log_table_to_comet_experiment(
+                    name="completions.csv",
+                    table=df,
+                )
+
+    # Ensure the model card is saved along with the checkpoint
+    def _save_checkpoint(self, model, trial):
+        if self.args.hub_model_id is None:
+            model_name = Path(self.args.output_dir).name
+        else:
+            model_name = self.args.hub_model_id.split("/")[-1]
+        self.create_model_card(model_name=model_name)
+        super()._save_checkpoint(model, trial)
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        citation = textwrap.dedent("""\
+        @article{mziegler2019fine-tuning,
+            title        = {{Fine-Tuning Language Models from Human Preferences}},
+            author       = {Daniel M. Ziegler and Nisan Stiennon and Jeffrey Wu and Tom B. Brown and Alec Radford and Dario Amodei and Paul F. Christiano and Geoffrey Irving},
+            year         = 2019,
+            eprint       = {arXiv:1909.08593}
+        }""")
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="PPO",
+            trainer_citation=citation,
+            paper_title="Fine-Tuning Language Models from Human Preferences",
+            paper_id="1909.08593",
+        )
+
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothPPOTrainer(_UnslothPPOTrainer):
+    """
+    
+    """
+    def __init__(
+        self,
+        args,
+        processing_class,
+        model,
+        ref_model,
+        reward_model,
+        train_dataset,
+        value_model,
+        data_collator = None,
+        eval_dataset = None,
+        callbacks = None,
+        peft_config = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothPPOConfig()
+        use_bf16 = getattr(args, 'bf16', False)
+        if type(use_bf16) is not bool: use_bf16 = False
+        use_fp16 = getattr(args, 'fp16', False)
+        if type(use_fp16) is not bool: use_fp16 = False
+        force_float32 = False
+        if os.environ.get('UNSLOTH_FORCE_FLOAT32', '0') == '1':
+            print('Unsloth: Switching to float32 training since model cannot work with float16')
+            force_float32 = True
+        mixed_precision_dtype = os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32')
+        dtype = getattr(model.config, 'torch_dtype', None)
+        if dtype is None: dtype = model.get_input_embeddings().dtype
+        from unsloth_zoo.utils import _get_dtype
+        dtype = _get_dtype(dtype)
+        float16 = dtype == torch.float16
+        if not force_float32 and (float16 and use_bf16): raise TypeError('Unsloth: Model is in float16 precision but you want to use bfloat16 precision. Set fp16 to `True` and bf16 to `False`')
+        if not force_float32 and (not float16 and use_fp16): raise TypeError('Unsloth: Model is in bfloat16 precision but you want to use float16 precision. Set fp16 to `False` and bf16 to `True`')
+        if force_float32:
+            args.fp16 = False
+            args.bf16 = False
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'no'
+        elif (not use_bf16 and not use_fp16) and mixed_precision_dtype == 'float32':
+            args.fp16 = float16
+            args.bf16 = not float16
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'fp16' if float16 else 'bf16'
+        if getattr(args, 'eval_dataset', None) is not None and getattr(args, 'eval_strategy', 'no') == 'no':
+            args.eval_strategy = 'steps'
+            if getattr(args, 'eval_steps', None) is None: args.eval_steps = 0.1
+        ga_steps = getattr(args, 'gradient_accumulation_steps', None)
+        if ga_steps is not None and ga_steps > 1:
+            from transformers import __version__ as transformers_version
+            if Version(transformers_version) <= Version('4.45.2'):
+                print('**** Unsloth: Please use our fixed gradient_accumulation_steps by updating transformers, TRL and Unsloth!\n'
+                      '`pip install --upgrade --no-cache-dir --force-reinstall --no-deps unsloth transformers trl unsloth_zoo`')
+        if getattr(args, 'eval_strategy', 'no') != 'no':
+            eval_bsz = getattr(args, 'per_device_eval_batch_size', 8)
+            if eval_bsz == 8 and args.per_device_train_batch_size < eval_bsz: args.per_device_eval_batch_size = args.per_device_train_batch_size
+            if getattr(args, 'eval_accumulation_steps', None) is None and ga_steps is not None: args.eval_accumulation_steps = ga_steps
+        fp16_full_eval = getattr(args, 'fp16_full_eval', False)
+        if type(fp16_full_eval) is not bool: fp16_full_eval = False
+        bf16_full_eval = getattr(args, 'bf16_full_eval', False)
+        if type(bf16_full_eval) is not bool: bf16_full_eval = False
+        if args.fp16 and bf16_full_eval: args.bf16_full_eval = False; args.fp16_full_eval = True
+        if args.bf16 and fp16_full_eval: args.bf16_full_eval = True; args.fp16_full_eval = False
+        if force_float32:
+            args.bf16_full_eval = False
+            args.fp16_full_eval = False
+        elif os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32') == 'bfloat16':
+            args.bf16_full_eval = True
+            args.fp16_full_eval = False
+        elif not bf16_full_eval and not fp16_full_eval:
+            args.bf16_full_eval = args.bf16
+            args.fp16_full_eval = args.fp16
+        _output_logits = False
+        if locals().get('compute_metrics', None) is not None: _output_logits = True
+        if locals().get('preprocess_logits_for_metrics', None) is not None: _output_logits = True
+        if _output_logits:
+            os.environ['UNSLOTH_RETURN_LOGITS'] = '1'
+        if 'max_seq_length' not in locals() and not hasattr(args, 'max_seq_length'):
+            pass
+        else:
+            model_max_seq_length = getattr(model, 'max_seq_length', None)
+            args_max_seq_length  = getattr(args,  'max_seq_length', None)
+            if args_max_seq_length is None and model_max_seq_length is not None:
+                max_seq_length = model.max_seq_length
+                if hasattr(args, 'max_seq_length'): args.max_seq_length = max_seq_length
+        if model is not None and hasattr(model, 'for_training'):
+            model.for_training()
+        if 'tokenizer' in locals() and hasattr(tokenizer, 'padding_side'): tokenizer.padding_side = 'right'
+        if 'processing_class' in locals():
+            if hasattr(processing_class, 'padding_side'): processing_class.padding_side = 'right'
+            if hasattr(processing_class, 'tokenizer') and hasattr(processing_class.tokenizer, 'padding_side'): processing_class.tokenizer.padding_side = 'right'
+        __tokenizer = processing_class if 'processing_class' in locals() else tokenizer
+        from unsloth_zoo.vision_utils import UnslothVisionDataCollator
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if isinstance(data_collator, DataCollatorForSeq2Seq) and 'labels' not in train_dataset.column_names:
+                data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False, mlm_probability = 0.0)
+            elif isinstance(data_collator, TransformersDataCollatorForLanguageModeling) and 'labels' in train_dataset.column_names:
+                data_collator = DataCollatorForSeq2Seq(__tokenizer)
+        else:
+            if hasattr(args, 'remove_unused_columns'): args.remove_unused_columns = False
+            if hasattr(args, 'dataset_text_field'): args.dataset_text_field = ''
+            if hasattr(args, 'dataset_kwargs'): args.dataset_kwargs = {'skip_prepare_dataset': True}
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if not hasattr(__tokenizer, 'pad') and hasattr(__tokenizer, 'tokenizer'):
+                if isinstance(data_collator, DataCollatorForSeq2Seq):
+                    data_collator = DataCollatorForSeq2Seq(__tokenizer.tokenizer)
+                else:
+                    data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False, mlm_probability = 0.0)
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('ppo_trainer', other_metrics)
+        
+        super().__init__(
+            args = args,
+            processing_class = processing_class,
+            model = model,
+            ref_model = ref_model,
+            reward_model = reward_model,
+            train_dataset = train_dataset,
+            value_model = value_model,
+            data_collator = data_collator,
+            eval_dataset = eval_dataset,
+            callbacks = callbacks,
+            peft_config = peft_config,**kwargs)
+        if hasattr(self, 'neftune_hook_handle'):
+            self.neftune_hook_handle.remove()
+            if hasattr(self, 'neftune_hook_handle'): del self.neftune_hook_handle
+        if getattr(args, 'neftune_noise_alpha', None) is not None:
+            model.get_input_embeddings().neftune_noise_alpha = self.neftune_noise_alpha
+        pass
+        if hasattr(self, 'accelerator'):
+            scaler = self.accelerator.scaler
+            current_model = model
+            while hasattr(current_model, 'model'):
+                current_model.accelerator_scaler = scaler
+                current_model = current_model.model
+            current_model.accelerator_scaler = scaler
+        pass
+        
+pass

unsloth_compiled_cache/UnslothPRMTrainer.py

@@ -0,0 +1,848 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.prm_trainer import (BaseImageProcessor, Callable, DataCollator, DataCollatorForTokenClassification, Dataset, EvalPrediction, FeatureExtractionMixin, Optional, PRMConfig, PRMTrainer, PartialState, Path, PeftModel, PreTrainedModel, PreTrainedTokenizerBase, ProcessorMixin, Trainer, TrainerCallback, Union, chain, compute_accuracy, disable_dropout_in_model, features, generate_model_card, inspect, is_peft_available, is_wandb_available, nn, os, prepare_model_for_kbit_training, textwrap, torch, wandb, warnings, Optional, PeftModel, PreTrainedModel, Trainer, is_peft_available, os, torch)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothPRMConfig(PRMConfig):
+    """
+    
+    Configuration class for the [`PRMTrainer`].
+
+    This class includes only the parameters that are specific to PRM training. For a full list of training arguments,
+    please refer to the [`~transformers.TrainingArguments`] documentation. Note that default values in this class may
+    differ from those in [`~transformers.TrainingArguments`].
+
+    Using [`~transformers.HfArgumentParser`] we can turn this class into
+    [argparse](https://docs.python.org/3/library/argparse#module-argparse) arguments that can be specified on the
+    command line.
+
+    Parameters:
+        max_length (`int` or `None`, *optional*, defaults to `1024`):
+            Maximum length of the sequences (prompt + completion) used for truncation.
+        max_prompt_length (`int` or `None`, *optional*, defaults to `512`):
+            Maximum length of the prompt used for truncation.
+        max_completion_length (`int` or `None`, *optional*, defaults to `None`):
+            Maximum length of the completion used for truncation. The completion is the concatenation of the steps.
+        disable_dropout (`bool`, *optional*, defaults to `True`):
+            Whether to disable dropout in the model.
+        step_separator (`str`, *optional*, defaults to `"\n"`):
+            Separator used to separate each step of the reasoning process.
+        train_on_last_step_only (`bool`, *optional*, defaults to `False`):
+            Whether to train only on the last step.
+        dataset_num_proc (`int`, *optional*, defaults to `None`):
+            Number of processes to use for processing the dataset.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    max_seq_length : Optional[int] = field(
+        default = None,
+        metadata = {'help': 'Maximum sequence length to truncate to.'},
+    )
+    def __init__(
+        self,
+        output_dir = None,
+        overwrite_output_dir = None,
+        do_train = False,
+        do_eval = False,
+        do_predict = False,
+        eval_strategy = 'no',
+        prediction_loss_only = False,
+        per_device_train_batch_size = 4,
+        per_device_eval_batch_size = 4,
+        per_gpu_train_batch_size = None,
+        per_gpu_eval_batch_size = None,
+        gradient_accumulation_steps = 2,
+        eval_accumulation_steps = 2,
+        eval_delay = 0,
+        torch_empty_cache_steps = 250,
+        learning_rate = 5e-05,
+        weight_decay = 0.01,
+        adam_beta1 = 0.9,
+        adam_beta2 = 0.999,
+        adam_epsilon = 1e-08,
+        max_grad_norm = 1.0,
+        num_train_epochs = 3.0,
+        max_steps = -1,
+        lr_scheduler_type = 'linear',
+        warmup_ratio = 0.1,
+        warmup_steps = 0,
+        log_level = 'passive',
+        log_level_replica = 'warning',
+        log_on_each_node = True,
+        logging_dir = None,
+        logging_strategy = 'steps',
+        logging_first_step = False,
+        logging_steps = 1,
+        logging_nan_inf_filter = False,
+        save_strategy = 'steps',
+        save_steps = 500,
+        save_total_limit = None,
+        save_safetensors = True,
+        save_on_each_node = False,
+        save_only_model = False,
+        restore_callback_states_from_checkpoint = False,
+        no_cuda = False,
+        use_cpu = False,
+        use_mps_device = False,
+        seed = 3407,
+        data_seed = 3407,
+        jit_mode_eval = False,
+        use_ipex = False,
+        bf16 = False,
+        fp16 = False,
+        fp16_opt_level = 'O1',
+        half_precision_backend = 'auto',
+        bf16_full_eval = False,
+        fp16_full_eval = False,
+        tf32 = None,
+        local_rank = -1,
+        ddp_backend = None,
+        tpu_num_cores = None,
+        tpu_metrics_debug = False,
+        debug = '',
+        dataloader_drop_last = False,
+        eval_steps = None,
+        dataloader_num_workers = 0,
+        dataloader_prefetch_factor = None,
+        past_index = -1,
+        run_name = None,
+        disable_tqdm = None,
+        remove_unused_columns = True,
+        label_names = None,
+        load_best_model_at_end = False,
+        metric_for_best_model = None,
+        greater_is_better = None,
+        ignore_data_skip = False,
+        fsdp = '',
+        fsdp_min_num_params = 0,
+        fsdp_config = None,
+        fsdp_transformer_layer_cls_to_wrap = None,
+        accelerator_config = None,
+        deepspeed = None,
+        label_smoothing_factor = 0.0,
+        optim = 'adamw_8bit',
+        optim_args = None,
+        adafactor = False,
+        group_by_length = False,
+        length_column_name = 'length',
+        report_to = None,
+        ddp_find_unused_parameters = None,
+        ddp_bucket_cap_mb = None,
+        ddp_broadcast_buffers = None,
+        dataloader_pin_memory = True,
+        dataloader_persistent_workers = False,
+        skip_memory_metrics = True,
+        use_legacy_prediction_loop = False,
+        push_to_hub = False,
+        resume_from_checkpoint = None,
+        hub_model_id = None,
+        hub_strategy = 'every_save',
+        hub_token = None,
+        hub_private_repo = None,
+        hub_always_push = False,
+        hub_revision = None,
+        gradient_checkpointing = False,
+        gradient_checkpointing_kwargs = None,
+        include_inputs_for_metrics = False,
+        eval_do_concat_batches = True,
+        fp16_backend = 'auto',
+        push_to_hub_model_id = None,
+        push_to_hub_organization = None,
+        push_to_hub_token = None,
+        mp_parameters = '',
+        auto_find_batch_size = True,
+        full_determinism = False,
+        torchdynamo = None,
+        ray_scope = 'last',
+        ddp_timeout = 1800,
+        torch_compile = False,
+        torch_compile_backend = None,
+        torch_compile_mode = None,
+        include_tokens_per_second = False,
+        include_num_input_tokens_seen = False,
+        neftune_noise_alpha = None,
+        optim_target_modules = None,
+        batch_eval_metrics = False,
+        eval_on_start = False,
+        use_liger_kernel = False,
+        liger_kernel_config = None,
+        eval_use_gather_object = False,
+        average_tokens_across_devices = True,
+        max_length = 1024,
+        max_prompt_length = 512,
+        max_completion_length = None,
+        disable_dropout = True,
+        step_separator = '\
+',
+        train_on_last_step_only = False,
+        dataset_num_proc = None,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        max_seq_length = None,
+        **kwargs,
+    ):
+        if learning_rate < 1e-7: raise FloatingPointError(f'Unsloth: Your learning rate of `{learning_rate}` is too small and less than 1e-7! Consider increasing it, otherwise gradient updates will be close to 0!')
+        if learning_rate > 1: raise OverflowError(f'Unsloth: Your learning rate of `{learning_rate}` is way too larger > 1! Consider decreasing it to 1e-1, otherwise gradient updates will explode!')
+        if output_dir is None and save_strategy == 'steps' and save_steps == 500:
+            output_dir = 'unsloth_training_checkpoints'
+            save_strategy = 'no'
+        if dataset_num_proc is None:
+            from multiprocessing import cpu_count
+            dataset_num_proc = min(cpu_count()*2, 2)
+        
+        super().__init__(
+            output_dir = output_dir,
+            overwrite_output_dir = overwrite_output_dir,
+            do_train = do_train,
+            do_eval = do_eval,
+            do_predict = do_predict,
+            eval_strategy = eval_strategy,
+            prediction_loss_only = prediction_loss_only,
+            per_device_train_batch_size = per_device_train_batch_size,
+            per_device_eval_batch_size = per_device_eval_batch_size,
+            per_gpu_train_batch_size = per_gpu_train_batch_size,
+            per_gpu_eval_batch_size = per_gpu_eval_batch_size,
+            gradient_accumulation_steps = gradient_accumulation_steps,
+            eval_accumulation_steps = eval_accumulation_steps,
+            eval_delay = eval_delay,
+            torch_empty_cache_steps = torch_empty_cache_steps,
+            learning_rate = learning_rate,
+            weight_decay = weight_decay,
+            adam_beta1 = adam_beta1,
+            adam_beta2 = adam_beta2,
+            adam_epsilon = adam_epsilon,
+            max_grad_norm = max_grad_norm,
+            num_train_epochs = num_train_epochs,
+            max_steps = max_steps,
+            lr_scheduler_type = lr_scheduler_type,
+            warmup_ratio = warmup_ratio,
+            warmup_steps = warmup_steps,
+            log_level = log_level,
+            log_level_replica = log_level_replica,
+            log_on_each_node = log_on_each_node,
+            logging_dir = logging_dir,
+            logging_strategy = logging_strategy,
+            logging_first_step = logging_first_step,
+            logging_steps = logging_steps,
+            logging_nan_inf_filter = logging_nan_inf_filter,
+            save_strategy = save_strategy,
+            save_steps = save_steps,
+            save_total_limit = save_total_limit,
+            save_safetensors = save_safetensors,
+            save_on_each_node = save_on_each_node,
+            save_only_model = save_only_model,
+            restore_callback_states_from_checkpoint = restore_callback_states_from_checkpoint,
+            no_cuda = no_cuda,
+            use_cpu = use_cpu,
+            use_mps_device = use_mps_device,
+            seed = seed,
+            data_seed = data_seed,
+            jit_mode_eval = jit_mode_eval,
+            use_ipex = use_ipex,
+            bf16 = bf16,
+            fp16 = fp16,
+            fp16_opt_level = fp16_opt_level,
+            half_precision_backend = half_precision_backend,
+            bf16_full_eval = bf16_full_eval,
+            fp16_full_eval = fp16_full_eval,
+            tf32 = tf32,
+            local_rank = local_rank,
+            ddp_backend = ddp_backend,
+            tpu_num_cores = tpu_num_cores,
+            tpu_metrics_debug = tpu_metrics_debug,
+            debug = debug,
+            dataloader_drop_last = dataloader_drop_last,
+            eval_steps = eval_steps,
+            dataloader_num_workers = dataloader_num_workers,
+            dataloader_prefetch_factor = dataloader_prefetch_factor,
+            past_index = past_index,
+            run_name = run_name,
+            disable_tqdm = disable_tqdm,
+            remove_unused_columns = remove_unused_columns,
+            label_names = label_names,
+            load_best_model_at_end = load_best_model_at_end,
+            metric_for_best_model = metric_for_best_model,
+            greater_is_better = greater_is_better,
+            ignore_data_skip = ignore_data_skip,
+            fsdp = fsdp,
+            fsdp_min_num_params = fsdp_min_num_params,
+            fsdp_config = fsdp_config,
+            fsdp_transformer_layer_cls_to_wrap = fsdp_transformer_layer_cls_to_wrap,
+            accelerator_config = accelerator_config,
+            deepspeed = deepspeed,
+            label_smoothing_factor = label_smoothing_factor,
+            optim = optim,
+            optim_args = optim_args,
+            adafactor = adafactor,
+            group_by_length = group_by_length,
+            length_column_name = length_column_name,
+            report_to = report_to,
+            ddp_find_unused_parameters = ddp_find_unused_parameters,
+            ddp_bucket_cap_mb = ddp_bucket_cap_mb,
+            ddp_broadcast_buffers = ddp_broadcast_buffers,
+            dataloader_pin_memory = dataloader_pin_memory,
+            dataloader_persistent_workers = dataloader_persistent_workers,
+            skip_memory_metrics = skip_memory_metrics,
+            use_legacy_prediction_loop = use_legacy_prediction_loop,
+            push_to_hub = push_to_hub,
+            resume_from_checkpoint = resume_from_checkpoint,
+            hub_model_id = hub_model_id,
+            hub_strategy = hub_strategy,
+            hub_token = hub_token,
+            hub_private_repo = hub_private_repo,
+            hub_always_push = hub_always_push,
+            hub_revision = hub_revision,
+            gradient_checkpointing = gradient_checkpointing,
+            gradient_checkpointing_kwargs = gradient_checkpointing_kwargs,
+            include_inputs_for_metrics = include_inputs_for_metrics,
+            eval_do_concat_batches = eval_do_concat_batches,
+            fp16_backend = fp16_backend,
+            push_to_hub_model_id = push_to_hub_model_id,
+            push_to_hub_organization = push_to_hub_organization,
+            push_to_hub_token = push_to_hub_token,
+            mp_parameters = mp_parameters,
+            auto_find_batch_size = auto_find_batch_size,
+            full_determinism = full_determinism,
+            torchdynamo = torchdynamo,
+            ray_scope = ray_scope,
+            ddp_timeout = ddp_timeout,
+            torch_compile = torch_compile,
+            torch_compile_backend = torch_compile_backend,
+            torch_compile_mode = torch_compile_mode,
+            include_tokens_per_second = include_tokens_per_second,
+            include_num_input_tokens_seen = include_num_input_tokens_seen,
+            neftune_noise_alpha = neftune_noise_alpha,
+            optim_target_modules = optim_target_modules,
+            batch_eval_metrics = batch_eval_metrics,
+            eval_on_start = eval_on_start,
+            use_liger_kernel = use_liger_kernel,
+            liger_kernel_config = liger_kernel_config,
+            eval_use_gather_object = eval_use_gather_object,
+            average_tokens_across_devices = average_tokens_across_devices,
+            max_length = max_length,
+            max_prompt_length = max_prompt_length,
+            max_completion_length = max_completion_length,
+            disable_dropout = disable_dropout,
+            step_separator = step_separator,
+            train_on_last_step_only = train_on_last_step_only,
+            dataset_num_proc = dataset_num_proc,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        self.max_seq_length = max_seq_length
+pass
+
+class _UnslothPRMTrainer(Trainer):
+    """"""
+
+    _tag_names = ["trl", "prm"]
+
+    def __init__(
+        self,
+        model: Optional[Union[PreTrainedModel, nn.Module]] = None,
+        args: Optional[PRMConfig] = None,
+        data_collator: Optional[DataCollator] = None,
+        train_dataset: Optional[Dataset] = None,
+        eval_dataset: Optional[Union[Dataset, dict[str, Dataset]]] = None,
+        processing_class: Optional[
+            Union[PreTrainedTokenizerBase, BaseImageProcessor, FeatureExtractionMixin, ProcessorMixin]
+        ] = None,
+        model_init: Optional[Callable[[], PreTrainedModel]] = None,
+        compute_metrics: Optional[Callable[[EvalPrediction], dict]] = None,
+        callbacks: Optional[list[TrainerCallback]] = None,
+        optimizers: tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR] = (
+            None,
+            None,
+        ),
+        preprocess_logits_for_metrics: Optional[Callable[[torch.Tensor, torch.Tensor], torch.Tensor]] = None,
+        peft_config: Optional[dict] = None,
+    ):
+        if not is_peft_available() and peft_config is not None:
+            raise ValueError(
+                "PEFT is not installed and you passed a `peft_config` in the trainer's kwargs, please install it to use the PEFT models"
+            )
+        elif is_peft_available() and peft_config is not None:
+            if not isinstance(model, PeftModel):
+                if getattr(model, "is_loaded_in_8bit", False) or getattr(model, "is_quantized", False):
+                    _supports_gc_kwargs = "gradient_checkpointing_kwargs" in list(
+                        inspect.signature(prepare_model_for_kbit_training).parameters
+                    )
+
+                    prepare_model_kwargs = {"use_gradient_checkpointing": args.gradient_checkpointing}
+
+                    if not _supports_gc_kwargs and args.gradient_checkpointing_kwargs is not None:
+                        warnings.warn(
+                            "You passed `gradient_checkpointing_kwargs` in the trainer's kwargs, but your peft version does not support it. "
+                            "please update to the latest version of peft to use `gradient_checkpointing_kwargs`."
+                        )
+                    elif _supports_gc_kwargs and args.gradient_checkpointing_kwargs is not None:
+                        prepare_model_kwargs["gradient_checkpointing_kwargs"] = args.gradient_checkpointing_kwargs
+
+                    model = prepare_model_for_kbit_training(model, **prepare_model_kwargs)
+
+                model = model
+
+        # Disable dropout in the model
+        if args.disable_dropout:
+            disable_dropout_in_model(model)
+
+        if compute_metrics is None:
+            compute_metrics = compute_accuracy
+
+        if data_collator is None:
+            if processing_class is None:
+                raise ValueError(
+                    "A processing_class must be specified when using the default DataCollatorForTokenClassification"
+                )
+            data_collator = DataCollatorForTokenClassification(processing_class, max_length=args.max_length)
+
+        if "input_ids" not in train_dataset.column_names:
+            with PartialState().main_process_first():
+                fn_kwargs = {
+                    "tokenizer": processing_class,
+                    "step_separator": args.step_separator,
+                    "max_length": args.max_length,
+                    "max_prompt_length": args.max_prompt_length,
+                    "max_completion_length": args.max_completion_length,
+                    "train_on_last_step_only": args.train_on_last_step_only,
+                }
+                train_fn_kwargs = {**fn_kwargs, "is_eval": False}
+                train_dataset = train_dataset.map(
+                    self.tokenize_row,
+                    fn_kwargs=train_fn_kwargs,
+                    num_proc=args.dataset_num_proc,
+                    remove_columns=train_dataset.features,
+                    desc="Tokenizing train dataset",
+                    features=features.Features(  # needed to avoid map to cast labels to bool
+                        {
+                            "labels": features.Sequence(features.Value("int64")),
+                            "input_ids": features.Sequence(features.Value("int64")),
+                        }
+                    ),
+                )
+
+                eval_fn_kwargs = {**fn_kwargs, "is_eval": True}
+                if eval_dataset is not None:
+                    eval_dataset = eval_dataset.map(
+                        self.tokenize_row,
+                        fn_kwargs=eval_fn_kwargs,
+                        num_proc=args.dataset_num_proc,
+                        remove_columns=eval_dataset.features,
+                        desc="Tokenizing eval dataset",
+                        features=features.Features(  # needed to avoid map to cast labels to bool
+                            {
+                                "labels": features.Sequence(features.Value("int64")),
+                                "input_ids": features.Sequence(features.Value("int64")),
+                            }
+                        ),
+                    )
+
+        super().__init__(
+            model=model,
+            args=args,
+            data_collator=data_collator,
+            train_dataset=train_dataset,
+            eval_dataset=eval_dataset,
+            processing_class=processing_class,
+            model_init=model_init,
+            compute_metrics=compute_metrics,
+            callbacks=callbacks,
+            optimizers=optimizers,
+            preprocess_logits_for_metrics=preprocess_logits_for_metrics,
+        )
+
+        # Add tags for models that have been loaded with the correct transformers version
+        if hasattr(self.model, "add_model_tags"):
+            self.model.add_model_tags(self._tag_names)
+
+    @staticmethod
+    def tokenize_row(
+        features,
+        tokenizer,
+        step_separator,
+        max_length,
+        max_prompt_length,
+        max_completion_length,
+        train_on_last_step_only,
+        is_eval,
+    ):
+        r"""
+        Tokenize a row of the dataset.
+
+        Args:
+            features (`dict[str, str]`):
+                Row of the dataset, should contain the keys `"prompt"`, `"completions"`, and `"labels"`.
+            tokenizer (`PreTrainedTokenizerBase`):
+                Tokenizer used to process the data.
+            step_separator (`str`):
+                Separator between steps in the completion.
+            max_length (`int` or `None`):
+               Maximum length of the sequences (prompt + completion). If `None`, the sequences are not truncated.
+            max_prompt_length (`int` or `None`):
+                Maximum length of the prompt. If `None`, the prompt is not truncated.
+            max_completion_length (`int` or `None`):
+                Maximum length of the completion sequences. If `None`, the completion sequences are not truncated.
+            train_on_last_step_only (`bool`):
+                Whether to train only on the last step. If `True`, the labels are `-100` for all tokens except the last
+                token of the completion.
+            is_eval (`bool`):
+                Whether the function is used to tokenize samples from a training or an evaluation dataset. Used only if
+                `train_on_last_step_only` is set to `True`.
+
+        Returns:
+            `dict[str, list[int]]`:
+                Tokenized sequences with the keys `"input_ids"`, and `"labels".
+
+        Example:
+        ```python
+        >>> from transformers import AutoTokenizer
+
+        >>> tokenizer = AutoTokenizer.from_pretrained("Qwen/Qwen2.5-0.5B")
+        >>> features = {
+        ...     "prompt": "Which number is larger, 9.8 or 9.11?",
+        ...     "completions": ["11 is greater than 8.", "Hence, 9.11 > 9.8."],
+        ...     "labels": [True, False],
+        ... }
+        >>> PRMTrainer.tokenize_row(
+        ...     features, tokenizer, "\n", max_completion_length=None, train_on_last_step_only=False, is_eval=False
+        ... )
+        {'input_ids': [23085, 1372, 374, 8131, 11, 220, 24, 13, 23, 476, 220, 24, 13, 16, 16, 30, 16, 16, 374, 7046, 1091, 220, 23, 13, 198, 39, 763, 11, 220, 24, 13, 16, 16, 861, 220, 24, 13, 23, 13, 198],
+         'labels': [-100, -100, -100, -100, -100, -100, -100, -100, 1, -100, -100, -100, -100, -100, -100, -100, -100, -100, -100, -100, -100, -100, -100, 0]}
+        ```
+        """
+        # Tokenize the prompt and completions
+        prompt_ids = tokenizer(features["prompt"], add_special_tokens=False)["input_ids"]
+        completions_ids = [
+            tokenizer(completion, add_special_tokens=False)["input_ids"] for completion in features["completions"]
+        ]
+        if train_on_last_step_only and not is_eval:
+            labels = [-100] * (len(features["labels"]) - 1) + [int(features["labels"][-1])]
+        else:
+            labels = [int(label) for label in features["labels"]]
+
+        # Get the ID of the separator token and add it to the completions
+        separator_ids = tokenizer.encode(step_separator, add_special_tokens=False)
+        completions_ids = [completion + separator_ids for completion in completions_ids]
+
+        # Create the label
+        labels = [[-100] * (len(completion) - 1) + [label] for completion, label in zip(completions_ids, labels)]
+
+        # Join the completions and labels steps
+        completion_ids = list(chain(*completions_ids))
+        labels = list(chain(*labels))
+
+        if tokenizer.bos_token_id is not None:
+            prompt_ids = [tokenizer.bos_token_id] + prompt_ids
+
+        # Truncate prompt and completion sequences
+        if max_prompt_length is not None:
+            prompt_ids = prompt_ids[-max_prompt_length:]
+        if max_completion_length is not None:
+            completion_ids = completion_ids[:max_completion_length]
+            labels = labels[:max_completion_length]
+
+        input_ids = prompt_ids + completion_ids
+        labels = [-100] * len(prompt_ids) + labels
+
+        if max_length is not None:
+            input_ids = input_ids[:max_length]
+            labels = labels[:max_length]
+
+        return {"input_ids": input_ids, "labels": labels}
+
+    # Ensure the model card is saved along with the checkpoint
+    def _save_checkpoint(self, model, trial):
+        if self.args.hub_model_id is None:
+            model_name = Path(self.args.output_dir).name
+        else:
+            model_name = self.args.hub_model_id.split("/")[-1]
+        self.create_model_card(model_name=model_name)
+        super()._save_checkpoint(model, trial)
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        citation = textwrap.dedent("""\
+        @article{uesato2022solving,
+            title        = {{Solving Math Word Problems With Process- and Outcome-Based Feedback}},
+            author       = {Uesato, Jonathan and Kushman, Nate and Kumar, Ramana and Song, Francis and Siegel, Noah and Wang, Lisa and Creswell, Antonia and Irving, Geoffrey and Higgins, Irina},
+            year         = 2022,
+            journal      = {arXiv preprint arXiv:2211.14275}
+        }""")
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            trainer_name="PRM",
+            trainer_citation=citation,
+            paper_title="Solving math word problems with process-and outcome-based feedback",
+        )
+
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothPRMTrainer(_UnslothPRMTrainer):
+    """
+    
+    Initialize PRMTrainer.
+
+    Args:
+        model (`transformers.PreTrainedModel`):
+            The model to train, preferably an `AutoModelForTokenClassification`.
+        args (`PRMConfig`):
+            The arguments to use for training.
+        data_collator (`transformers.DataCollator`):
+            The data collator to use for training. If None is specified, the default data collator
+            (`DataCollatorForTokenClassification`) will be used which will pad the sequences to the maximum length of
+            the sequences in the batch, given a dataset of paired sequences.
+        train_dataset (`datasets.Dataset`):
+            The dataset to use for training.
+        eval_dataset (`datasets.Dataset`):
+            The dataset to use for evaluation.
+        processing_class ([`~transformers.PreTrainedTokenizerBase`], [`~transformers.BaseImageProcessor`], [`~transformers.FeatureExtractionMixin`] or [`~transformers.ProcessorMixin`], *optional*, defaults to `None`):
+            Processing class used to process the data. If provided, will be used to automatically process the inputs
+            for the model, and it will be saved along the model to make it easier to rerun an interrupted training or
+            reuse the fine-tuned model.
+        model_init (`Callable[[], transformers.PreTrainedModel]`):
+            The model initializer to use for training. If None is specified, the default model initializer will be
+            used.
+        compute_metrics (`Callable[[transformers.EvalPrediction], dict]`, *optional* defaults to `compute_accuracy`):
+            The metrics to use for evaluation. If no metrics are specified, the default metric (`compute_accuracy`)
+            will be used.
+        callbacks (`list[transformers.TrainerCallback]`):
+            The callbacks to use for training.
+        optimizers (`tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR]`):
+            The optimizer and scheduler to use for training.
+        preprocess_logits_for_metrics (`Callable[[torch.Tensor, torch.Tensor], torch.Tensor]`):
+            The function to use to preprocess the logits before computing the metrics.
+        peft_config (`dict`, defaults to `None`):
+            The PEFT configuration to use for training. If you pass a PEFT configuration, the model will be wrapped in
+            a PEFT model.
+    
+    """
+    def __init__(
+        self,
+        model = None,
+        args = None,
+        data_collator = None,
+        train_dataset = None,
+        eval_dataset = None,
+        processing_class = None,
+        model_init = None,
+        compute_metrics = None,
+        callbacks = None,
+        preprocess_logits_for_metrics = None,
+        peft_config = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothPRMConfig()
+        use_bf16 = getattr(args, 'bf16', False)
+        if type(use_bf16) is not bool: use_bf16 = False
+        use_fp16 = getattr(args, 'fp16', False)
+        if type(use_fp16) is not bool: use_fp16 = False
+        force_float32 = False
+        if os.environ.get('UNSLOTH_FORCE_FLOAT32', '0') == '1':
+            print('Unsloth: Switching to float32 training since model cannot work with float16')
+            force_float32 = True
+        mixed_precision_dtype = os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32')
+        dtype = getattr(model.config, 'torch_dtype', None)
+        if dtype is None: dtype = model.get_input_embeddings().dtype
+        from unsloth_zoo.utils import _get_dtype
+        dtype = _get_dtype(dtype)
+        float16 = dtype == torch.float16
+        if not force_float32 and (float16 and use_bf16): raise TypeError('Unsloth: Model is in float16 precision but you want to use bfloat16 precision. Set fp16 to `True` and bf16 to `False`')
+        if not force_float32 and (not float16 and use_fp16): raise TypeError('Unsloth: Model is in bfloat16 precision but you want to use float16 precision. Set fp16 to `False` and bf16 to `True`')
+        if force_float32:
+            args.fp16 = False
+            args.bf16 = False
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'no'
+        elif (not use_bf16 and not use_fp16) and mixed_precision_dtype == 'float32':
+            args.fp16 = float16
+            args.bf16 = not float16
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'fp16' if float16 else 'bf16'
+        if getattr(args, 'eval_dataset', None) is not None and getattr(args, 'eval_strategy', 'no') == 'no':
+            args.eval_strategy = 'steps'
+            if getattr(args, 'eval_steps', None) is None: args.eval_steps = 0.1
+        ga_steps = getattr(args, 'gradient_accumulation_steps', None)
+        if ga_steps is not None and ga_steps > 1:
+            from transformers import __version__ as transformers_version
+            if Version(transformers_version) <= Version('4.45.2'):
+                print('**** Unsloth: Please use our fixed gradient_accumulation_steps by updating transformers, TRL and Unsloth!\n'
+                      '`pip install --upgrade --no-cache-dir --force-reinstall --no-deps unsloth transformers trl unsloth_zoo`')
+        if getattr(args, 'eval_strategy', 'no') != 'no':
+            eval_bsz = getattr(args, 'per_device_eval_batch_size', 8)
+            if eval_bsz == 8 and args.per_device_train_batch_size < eval_bsz: args.per_device_eval_batch_size = args.per_device_train_batch_size
+            if getattr(args, 'eval_accumulation_steps', None) is None and ga_steps is not None: args.eval_accumulation_steps = ga_steps
+        fp16_full_eval = getattr(args, 'fp16_full_eval', False)
+        if type(fp16_full_eval) is not bool: fp16_full_eval = False
+        bf16_full_eval = getattr(args, 'bf16_full_eval', False)
+        if type(bf16_full_eval) is not bool: bf16_full_eval = False
+        if args.fp16 and bf16_full_eval: args.bf16_full_eval = False; args.fp16_full_eval = True
+        if args.bf16 and fp16_full_eval: args.bf16_full_eval = True; args.fp16_full_eval = False
+        if force_float32:
+            args.bf16_full_eval = False
+            args.fp16_full_eval = False
+        elif os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32') == 'bfloat16':
+            args.bf16_full_eval = True
+            args.fp16_full_eval = False
+        elif not bf16_full_eval and not fp16_full_eval:
+            args.bf16_full_eval = args.bf16
+            args.fp16_full_eval = args.fp16
+        _output_logits = False
+        if locals().get('compute_metrics', None) is not None: _output_logits = True
+        if locals().get('preprocess_logits_for_metrics', None) is not None: _output_logits = True
+        if _output_logits:
+            os.environ['UNSLOTH_RETURN_LOGITS'] = '1'
+        if 'max_seq_length' not in locals() and not hasattr(args, 'max_seq_length'):
+            pass
+        else:
+            model_max_seq_length = getattr(model, 'max_seq_length', None)
+            args_max_seq_length  = getattr(args,  'max_seq_length', None)
+            if args_max_seq_length is None and model_max_seq_length is not None:
+                max_seq_length = model.max_seq_length
+                if hasattr(args, 'max_seq_length'): args.max_seq_length = max_seq_length
+        if model is not None and hasattr(model, 'for_training'):
+            model.for_training()
+        if 'tokenizer' in locals() and hasattr(tokenizer, 'padding_side'): tokenizer.padding_side = 'right'
+        if 'processing_class' in locals():
+            if hasattr(processing_class, 'padding_side'): processing_class.padding_side = 'right'
+            if hasattr(processing_class, 'tokenizer') and hasattr(processing_class.tokenizer, 'padding_side'): processing_class.tokenizer.padding_side = 'right'
+        __tokenizer = processing_class if 'processing_class' in locals() else tokenizer
+        from unsloth_zoo.vision_utils import UnslothVisionDataCollator
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if isinstance(data_collator, DataCollatorForSeq2Seq) and 'labels' not in train_dataset.column_names:
+                data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False, mlm_probability = 0.0)
+            elif isinstance(data_collator, TransformersDataCollatorForLanguageModeling) and 'labels' in train_dataset.column_names:
+                data_collator = DataCollatorForSeq2Seq(__tokenizer)
+        else:
+            if hasattr(args, 'remove_unused_columns'): args.remove_unused_columns = False
+            if hasattr(args, 'dataset_text_field'): args.dataset_text_field = ''
+            if hasattr(args, 'dataset_kwargs'): args.dataset_kwargs = {'skip_prepare_dataset': True}
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if not hasattr(__tokenizer, 'pad') and hasattr(__tokenizer, 'tokenizer'):
+                if isinstance(data_collator, DataCollatorForSeq2Seq):
+                    data_collator = DataCollatorForSeq2Seq(__tokenizer.tokenizer)
+                else:
+                    data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False, mlm_probability = 0.0)
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('prm_trainer', other_metrics)
+        
+        super().__init__(
+            model = model,
+            args = args,
+            data_collator = data_collator,
+            train_dataset = train_dataset,
+            eval_dataset = eval_dataset,
+            processing_class = processing_class,
+            model_init = model_init,
+            compute_metrics = compute_metrics,
+            callbacks = callbacks,
+            preprocess_logits_for_metrics = preprocess_logits_for_metrics,
+            peft_config = peft_config,**kwargs)
+        if hasattr(self, 'neftune_hook_handle'):
+            self.neftune_hook_handle.remove()
+            if hasattr(self, 'neftune_hook_handle'): del self.neftune_hook_handle
+        if getattr(args, 'neftune_noise_alpha', None) is not None:
+            model.get_input_embeddings().neftune_noise_alpha = self.neftune_noise_alpha
+        pass
+        if hasattr(self, 'accelerator'):
+            scaler = self.accelerator.scaler
+            current_model = model
+            while hasattr(current_model, 'model'):
+                current_model.accelerator_scaler = scaler
+                current_model = current_model.model
+            current_model.accelerator_scaler = scaler
+        pass
+        
+pass

unsloth_compiled_cache/UnslothRLOOTrainer.py

@@ -0,0 +1,1174 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.rloo_trainer import (Accelerator, BaseImageProcessor, Callable, CallbackHandler, DEFAULT_CALLBACKS, DEFAULT_PROGRESS_CALLBACK, DataCollatorWithPadding, DataLoader, Dataset, ExportableState, FeatureExtractionMixin, GenerationConfig, INVALID_LOGPROB, OnlineTrainerState, Optional, Path, PreTrainedTokenizerBase, PrinterCallback, ProcessorMixin, RLOOConfig, RLOOTrainer, Trainer, TrainerCallback, TrainerControl, Union, batch_generation, broadcast, defaultdict, disable_dropout_in_model, empty_cache, exact_div, first_true_indices, forward, gather_object, gc, generate_model_card, get_comet_experiment_url, get_reporting_integration_callbacks, get_reward, is_rich_available, is_wandb_available, log_table_to_comet_experiment, math, nn, np, os, pd, prepare_deepspeed, print_rich_table, selective_log_softmax, textwrap, time, torch, truncate_response, unwrap_model_for_generation, wandb, Optional, Trainer, os, torch)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothRLOOConfig(RLOOConfig):
+    """
+    
+    Configuration class for the [`RLOOTrainer`].
+
+    This class includes only the parameters that are specific to RLOO training. For a full list of training arguments,
+    please refer to the [`~transformers.TrainingArguments`] and [`OnPolicyConfig`] documentation. Note that default
+    values in this class may differ from those in [`~transformers.TrainingArguments`].
+
+    Using [`~transformers.HfArgumentParser`] we can turn this class into
+    [argparse](https://docs.python.org/3/library/argparse#module-argparse) arguments that can be specified on the
+    command line.
+
+    Parameters:
+        exp_name (`str`, *optional*, defaults to `os.path.basename(__file__)[: -len(".py")]`):
+            Name of this experiment.
+        reward_model_path (`str`, *optional*, defaults to `"EleutherAI/pythia-160m"`):
+            Path to the reward model.
+        num_ppo_epochs (`int`, *optional*, defaults to `4`):
+            Number of epochs to train.
+        whiten_rewards (`bool`, *optional*, defaults to `False`):
+            Whether to whiten the rewards.
+        kl_coef (`float`, *optional*, defaults to `0.05`):
+            KL coefficient.
+        cliprange (`float`, *optional*, defaults to `0.2`):
+            Clip range.
+        rloo_k (`int`, *optional*, defaults to `2`):
+            REINFORCE Leave-One-Out (RLOO) number of online samples per prompt.
+        normalize_reward (`bool`, *optional*, defaults to `False`):
+            Whether to normalize rewards.
+        reward_clip_range (`float`, *optional*, defaults to `10.0`):
+            Clip range for rewards.
+        normalize_advantage (`bool`, *optional*, defaults to `False`):
+            Whether to normalize advantages.
+        token_level_kl (`bool`, *optional*, defaults to `True`):
+            Whether to use token-level KL penalty or sequence-level KL penalty.
+        ds3_gather_for_generation (`bool`, *optional*, defaults to `True`):
+            This setting applies to DeepSpeed ZeRO-3. If enabled, the policy model weights are gathered for generation,
+            improving generation speed. However, disabling this option allows training models that exceed the VRAM
+            capacity of a single GPU, albeit at the cost of slower generation.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    
+    def __init__(
+        self,
+        output_dir = None,
+        overwrite_output_dir = None,
+        do_train = False,
+        do_eval = False,
+        do_predict = False,
+        eval_strategy = 'no',
+        prediction_loss_only = False,
+        per_device_train_batch_size = 4,
+        per_device_eval_batch_size = 4,
+        per_gpu_train_batch_size = None,
+        per_gpu_eval_batch_size = None,
+        gradient_accumulation_steps = 2,
+        eval_accumulation_steps = 2,
+        eval_delay = 0,
+        torch_empty_cache_steps = 250,
+        learning_rate = 5e-05,
+        weight_decay = 0.01,
+        adam_beta1 = 0.9,
+        adam_beta2 = 0.999,
+        adam_epsilon = 1e-08,
+        max_grad_norm = 1.0,
+        num_train_epochs = 3.0,
+        max_steps = -1,
+        lr_scheduler_type = 'linear',
+        warmup_ratio = 0.1,
+        warmup_steps = 0,
+        log_level = 'passive',
+        log_level_replica = 'warning',
+        log_on_each_node = True,
+        logging_dir = None,
+        logging_strategy = 'steps',
+        logging_first_step = False,
+        logging_steps = 1,
+        logging_nan_inf_filter = False,
+        save_strategy = 'steps',
+        save_steps = 500,
+        save_total_limit = None,
+        save_safetensors = True,
+        save_on_each_node = False,
+        save_only_model = False,
+        restore_callback_states_from_checkpoint = False,
+        no_cuda = False,
+        use_cpu = False,
+        use_mps_device = False,
+        seed = 3407,
+        data_seed = 3407,
+        jit_mode_eval = False,
+        use_ipex = False,
+        bf16 = False,
+        fp16 = False,
+        fp16_opt_level = 'O1',
+        half_precision_backend = 'auto',
+        bf16_full_eval = False,
+        fp16_full_eval = False,
+        tf32 = None,
+        local_rank = -1,
+        ddp_backend = None,
+        tpu_num_cores = None,
+        tpu_metrics_debug = False,
+        debug = '',
+        dataloader_drop_last = False,
+        eval_steps = None,
+        dataloader_num_workers = 0,
+        dataloader_prefetch_factor = None,
+        past_index = -1,
+        run_name = None,
+        disable_tqdm = None,
+        remove_unused_columns = True,
+        label_names = None,
+        load_best_model_at_end = False,
+        metric_for_best_model = None,
+        greater_is_better = None,
+        ignore_data_skip = False,
+        fsdp = '',
+        fsdp_min_num_params = 0,
+        fsdp_config = None,
+        fsdp_transformer_layer_cls_to_wrap = None,
+        accelerator_config = None,
+        deepspeed = None,
+        label_smoothing_factor = 0.0,
+        optim = 'adamw_8bit',
+        optim_args = None,
+        adafactor = False,
+        group_by_length = False,
+        length_column_name = 'length',
+        report_to = None,
+        ddp_find_unused_parameters = None,
+        ddp_bucket_cap_mb = None,
+        ddp_broadcast_buffers = None,
+        dataloader_pin_memory = True,
+        dataloader_persistent_workers = False,
+        skip_memory_metrics = True,
+        use_legacy_prediction_loop = False,
+        push_to_hub = False,
+        resume_from_checkpoint = None,
+        hub_model_id = None,
+        hub_strategy = 'every_save',
+        hub_token = None,
+        hub_private_repo = None,
+        hub_always_push = False,
+        hub_revision = None,
+        gradient_checkpointing = False,
+        gradient_checkpointing_kwargs = None,
+        include_inputs_for_metrics = False,
+        eval_do_concat_batches = True,
+        fp16_backend = 'auto',
+        push_to_hub_model_id = None,
+        push_to_hub_organization = None,
+        push_to_hub_token = None,
+        mp_parameters = '',
+        auto_find_batch_size = True,
+        full_determinism = False,
+        torchdynamo = None,
+        ray_scope = 'last',
+        ddp_timeout = 1800,
+        torch_compile = False,
+        torch_compile_backend = None,
+        torch_compile_mode = None,
+        include_tokens_per_second = False,
+        include_num_input_tokens_seen = False,
+        neftune_noise_alpha = None,
+        optim_target_modules = None,
+        batch_eval_metrics = False,
+        eval_on_start = False,
+        use_liger_kernel = False,
+        liger_kernel_config = None,
+        eval_use_gather_object = False,
+        average_tokens_across_devices = True,
+        dataset_num_proc = None,
+        num_mini_batches = 1,
+        total_episodes = None,
+        local_rollout_forward_batch_size = 64,
+        num_sample_generations = 10,
+        response_length = 53,
+        stop_token = None,
+        stop_token_id = None,
+        temperature = 0.7,
+        missing_eos_penalty = None,
+        sft_model_path = 'EleutherAI/pythia-160m',
+        world_size = None,
+        num_total_batches = None,
+        micro_batch_size = None,
+        local_batch_size = None,
+        batch_size = None,
+        local_mini_batch_size = None,
+        mini_batch_size = None,
+        exp_name = 'rloo_config',
+        reward_model_path = 'EleutherAI/pythia-160m',
+        num_ppo_epochs = 4,
+        whiten_rewards = False,
+        kl_coef = 0.05,
+        cliprange = 0.2,
+        rloo_k = 2,
+        normalize_reward = False,
+        reward_clip_range = 10.0,
+        normalize_advantage = False,
+        token_level_kl = False,
+        ds3_gather_for_generation = True,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        
+        **kwargs,
+    ):
+        if learning_rate < 1e-7: raise FloatingPointError(f'Unsloth: Your learning rate of `{learning_rate}` is too small and less than 1e-7! Consider increasing it, otherwise gradient updates will be close to 0!')
+        if learning_rate > 1: raise OverflowError(f'Unsloth: Your learning rate of `{learning_rate}` is way too larger > 1! Consider decreasing it to 1e-1, otherwise gradient updates will explode!')
+        if output_dir is None and save_strategy == 'steps' and save_steps == 500:
+            output_dir = 'unsloth_training_checkpoints'
+            save_strategy = 'no'
+        if dataset_num_proc is None:
+            from multiprocessing import cpu_count
+            dataset_num_proc = min(cpu_count()*2, 2)
+        if temperature <= 0:
+            raise MathError('Unsloth: Please set a positive non-zero temperature since your results will be wrong.')
+        elif temperature >= 10:
+            raise MathError('Unsloth: Please set a positive non-zero temperature less than 10, since sampling will be quite erratic.')
+        
+        
+        super().__init__(
+            output_dir = output_dir,
+            overwrite_output_dir = overwrite_output_dir,
+            do_train = do_train,
+            do_eval = do_eval,
+            do_predict = do_predict,
+            eval_strategy = eval_strategy,
+            prediction_loss_only = prediction_loss_only,
+            per_device_train_batch_size = per_device_train_batch_size,
+            per_device_eval_batch_size = per_device_eval_batch_size,
+            per_gpu_train_batch_size = per_gpu_train_batch_size,
+            per_gpu_eval_batch_size = per_gpu_eval_batch_size,
+            gradient_accumulation_steps = gradient_accumulation_steps,
+            eval_accumulation_steps = eval_accumulation_steps,
+            eval_delay = eval_delay,
+            torch_empty_cache_steps = torch_empty_cache_steps,
+            learning_rate = learning_rate,
+            weight_decay = weight_decay,
+            adam_beta1 = adam_beta1,
+            adam_beta2 = adam_beta2,
+            adam_epsilon = adam_epsilon,
+            max_grad_norm = max_grad_norm,
+            num_train_epochs = num_train_epochs,
+            max_steps = max_steps,
+            lr_scheduler_type = lr_scheduler_type,
+            warmup_ratio = warmup_ratio,
+            warmup_steps = warmup_steps,
+            log_level = log_level,
+            log_level_replica = log_level_replica,
+            log_on_each_node = log_on_each_node,
+            logging_dir = logging_dir,
+            logging_strategy = logging_strategy,
+            logging_first_step = logging_first_step,
+            logging_steps = logging_steps,
+            logging_nan_inf_filter = logging_nan_inf_filter,
+            save_strategy = save_strategy,
+            save_steps = save_steps,
+            save_total_limit = save_total_limit,
+            save_safetensors = save_safetensors,
+            save_on_each_node = save_on_each_node,
+            save_only_model = save_only_model,
+            restore_callback_states_from_checkpoint = restore_callback_states_from_checkpoint,
+            no_cuda = no_cuda,
+            use_cpu = use_cpu,
+            use_mps_device = use_mps_device,
+            seed = seed,
+            data_seed = data_seed,
+            jit_mode_eval = jit_mode_eval,
+            use_ipex = use_ipex,
+            bf16 = bf16,
+            fp16 = fp16,
+            fp16_opt_level = fp16_opt_level,
+            half_precision_backend = half_precision_backend,
+            bf16_full_eval = bf16_full_eval,
+            fp16_full_eval = fp16_full_eval,
+            tf32 = tf32,
+            local_rank = local_rank,
+            ddp_backend = ddp_backend,
+            tpu_num_cores = tpu_num_cores,
+            tpu_metrics_debug = tpu_metrics_debug,
+            debug = debug,
+            dataloader_drop_last = dataloader_drop_last,
+            eval_steps = eval_steps,
+            dataloader_num_workers = dataloader_num_workers,
+            dataloader_prefetch_factor = dataloader_prefetch_factor,
+            past_index = past_index,
+            run_name = run_name,
+            disable_tqdm = disable_tqdm,
+            remove_unused_columns = remove_unused_columns,
+            label_names = label_names,
+            load_best_model_at_end = load_best_model_at_end,
+            metric_for_best_model = metric_for_best_model,
+            greater_is_better = greater_is_better,
+            ignore_data_skip = ignore_data_skip,
+            fsdp = fsdp,
+            fsdp_min_num_params = fsdp_min_num_params,
+            fsdp_config = fsdp_config,
+            fsdp_transformer_layer_cls_to_wrap = fsdp_transformer_layer_cls_to_wrap,
+            accelerator_config = accelerator_config,
+            deepspeed = deepspeed,
+            label_smoothing_factor = label_smoothing_factor,
+            optim = optim,
+            optim_args = optim_args,
+            adafactor = adafactor,
+            group_by_length = group_by_length,
+            length_column_name = length_column_name,
+            report_to = report_to,
+            ddp_find_unused_parameters = ddp_find_unused_parameters,
+            ddp_bucket_cap_mb = ddp_bucket_cap_mb,
+            ddp_broadcast_buffers = ddp_broadcast_buffers,
+            dataloader_pin_memory = dataloader_pin_memory,
+            dataloader_persistent_workers = dataloader_persistent_workers,
+            skip_memory_metrics = skip_memory_metrics,
+            use_legacy_prediction_loop = use_legacy_prediction_loop,
+            push_to_hub = push_to_hub,
+            resume_from_checkpoint = resume_from_checkpoint,
+            hub_model_id = hub_model_id,
+            hub_strategy = hub_strategy,
+            hub_token = hub_token,
+            hub_private_repo = hub_private_repo,
+            hub_always_push = hub_always_push,
+            hub_revision = hub_revision,
+            gradient_checkpointing = gradient_checkpointing,
+            gradient_checkpointing_kwargs = gradient_checkpointing_kwargs,
+            include_inputs_for_metrics = include_inputs_for_metrics,
+            eval_do_concat_batches = eval_do_concat_batches,
+            fp16_backend = fp16_backend,
+            push_to_hub_model_id = push_to_hub_model_id,
+            push_to_hub_organization = push_to_hub_organization,
+            push_to_hub_token = push_to_hub_token,
+            mp_parameters = mp_parameters,
+            auto_find_batch_size = auto_find_batch_size,
+            full_determinism = full_determinism,
+            torchdynamo = torchdynamo,
+            ray_scope = ray_scope,
+            ddp_timeout = ddp_timeout,
+            torch_compile = torch_compile,
+            torch_compile_backend = torch_compile_backend,
+            torch_compile_mode = torch_compile_mode,
+            include_tokens_per_second = include_tokens_per_second,
+            include_num_input_tokens_seen = include_num_input_tokens_seen,
+            neftune_noise_alpha = neftune_noise_alpha,
+            optim_target_modules = optim_target_modules,
+            batch_eval_metrics = batch_eval_metrics,
+            eval_on_start = eval_on_start,
+            use_liger_kernel = use_liger_kernel,
+            liger_kernel_config = liger_kernel_config,
+            eval_use_gather_object = eval_use_gather_object,
+            average_tokens_across_devices = average_tokens_across_devices,
+            dataset_num_proc = dataset_num_proc,
+            num_mini_batches = num_mini_batches,
+            total_episodes = total_episodes,
+            local_rollout_forward_batch_size = local_rollout_forward_batch_size,
+            num_sample_generations = num_sample_generations,
+            response_length = response_length,
+            stop_token = stop_token,
+            stop_token_id = stop_token_id,
+            temperature = temperature,
+            missing_eos_penalty = missing_eos_penalty,
+            sft_model_path = sft_model_path,
+            world_size = world_size,
+            num_total_batches = num_total_batches,
+            micro_batch_size = micro_batch_size,
+            local_batch_size = local_batch_size,
+            batch_size = batch_size,
+            local_mini_batch_size = local_mini_batch_size,
+            mini_batch_size = mini_batch_size,
+            exp_name = exp_name,
+            reward_model_path = reward_model_path,
+            num_ppo_epochs = num_ppo_epochs,
+            whiten_rewards = whiten_rewards,
+            kl_coef = kl_coef,
+            cliprange = cliprange,
+            rloo_k = rloo_k,
+            normalize_reward = normalize_reward,
+            reward_clip_range = reward_clip_range,
+            normalize_advantage = normalize_advantage,
+            token_level_kl = token_level_kl,
+            ds3_gather_for_generation = ds3_gather_for_generation,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        
+pass
+
+class _UnslothRLOOTrainer(Trainer):
+    _tag_names = ["trl", "rloo"]
+
+    def __init__(
+        self,
+        config: RLOOConfig,
+        processing_class: Optional[
+            Union[PreTrainedTokenizerBase, BaseImageProcessor, FeatureExtractionMixin, ProcessorMixin]
+        ],
+        policy: nn.Module,
+        ref_policy: nn.Module,
+        reward_model: Union[nn.Module, Callable[[list[str]], list[float]]],
+        train_dataset: Dataset,
+        data_collator: Optional[DataCollatorWithPadding] = None,
+        eval_dataset: Optional[Union[Dataset, dict[str, Dataset]]] = None,
+        # less commonly used
+        optimizers: tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR] = (None, None),
+        callbacks: Optional[list[TrainerCallback]] = None,
+    ) -> None:
+        if ref_policy is policy:
+            raise ValueError(
+                "`policy` and `ref_policy` cannot be the same object. If you want `ref_policy` to be the "
+                "same as `policy`, you must mass a copy of it, or `None` if you use peft."
+            )
+
+        self.args = config
+        args = config
+        self.processing_class = processing_class
+        self.policy = policy
+
+        # Define the collator if not provided
+        if data_collator is None:
+            data_collator = DataCollatorWithPadding(self.processing_class)
+
+        self.policy.generation_config.eos_token_id = (
+            None  # disable `pad_token_id` and `eos_token_id` because we just want to
+        )
+        self.policy.generation_config.pad_token_id = None  # generate tokens without truncation / padding
+
+        self.ref_policy = ref_policy
+        self.reward_model = reward_model
+        self.train_dataset = train_dataset
+        self.train_dataset_len = len(train_dataset)
+        self.data_collator = data_collator
+        self.eval_dataset = eval_dataset
+        self.optimizer, self.lr_scheduler = optimizers
+        self.optimizer_cls_and_kwargs = None  # needed for transformers >= 4.47
+
+        #########
+        # calculate various batch sizes
+        #########
+        if args.total_episodes is None:  # allow the users to define episodes in terms of epochs.
+            args.total_episodes = int(args.num_train_epochs * self.train_dataset_len)
+        accelerator = Accelerator(gradient_accumulation_steps=args.gradient_accumulation_steps)
+        self.accelerator = accelerator
+        args.world_size = accelerator.num_processes
+        args.local_batch_size = (
+            args.per_device_train_batch_size * args.gradient_accumulation_steps * args.num_mini_batches
+        )
+        args.micro_batch_size = int(args.per_device_train_batch_size * args.world_size)
+        args.batch_size = int(args.local_batch_size * args.world_size)
+        args.mini_batch_size = exact_div(
+            args.batch_size, args.num_mini_batches, "`batch_size` must be a multiple of `num_mini_batches`"
+        )
+        args.local_mini_batch_size = exact_div(
+            args.local_batch_size, args.num_mini_batches, "`local_batch_size` must be a multiple of `num_mini_batches`"
+        )
+        args.num_total_batches = math.ceil(
+            args.total_episodes / args.batch_size
+        )  # we may train for more than `total_episodes`
+        time_tensor = torch.tensor(int(time.time()), device=accelerator.device)
+        time_int = broadcast(time_tensor, 0).item()  # avoid different timestamps across processes
+        args.run_name = f"{args.exp_name}__{args.seed}__{time_int}"
+        self.local_seed = args.seed + accelerator.process_index * 100003  # Prime
+        if args.num_sample_generations > 0:
+            self.sample_generations_freq = max(1, args.num_total_batches // args.num_sample_generations)
+        self.local_dataloader_batch_size = exact_div(
+            args.local_batch_size, args.rloo_k, "`local_batch_size` must be a multiple of rloo_k"
+        )  # RLOO logic: needed because RLOO repeats the same prompt args.rloo_k times
+
+        #########
+        # setup model, optimizer, and others
+        #########
+        for module in [policy, ref_policy, reward_model]:
+            if isinstance(module, nn.Module):
+                disable_dropout_in_model(module)
+        if args.stop_token and args.stop_token == "eos":
+            args.stop_token_id = self.processing_class.eos_token_id
+        self.model = policy
+        self.create_optimizer_and_scheduler(
+            num_training_steps=args.num_total_batches
+        )  # note that we are calling `self.lr_scheduler.step[]` manually only at the batch level
+
+        #########
+        ### trainer specifics
+        #########
+        default_callbacks = DEFAULT_CALLBACKS + get_reporting_integration_callbacks(self.args.report_to)
+        self.callbacks = default_callbacks if callbacks is None else default_callbacks + callbacks
+        self.callback_handler = CallbackHandler(
+            self.callbacks, self.model, self.processing_class, self.optimizer, self.lr_scheduler
+        )
+        self.add_callback(PrinterCallback if self.args.disable_tqdm else DEFAULT_PROGRESS_CALLBACK)
+        self.control = TrainerControl()
+        self.state = OnlineTrainerState(
+            is_local_process_zero=self.is_local_process_zero(),
+            is_world_process_zero=self.is_world_process_zero(),
+            stateful_callbacks=[
+                cb for cb in self.callback_handler.callbacks + [self.control] if isinstance(cb, ExportableState)
+            ],
+        )
+
+        self.current_flos = 0
+        self.hp_search_backend = None
+        self.is_deepspeed_enabled = getattr(self.accelerator.state, "deepspeed_plugin", None) is not None
+        self.is_fsdp_enabled = getattr(self.accelerator.state, "fsdp_plugin", None) is not None
+        # Create distant repo and output directory if needed
+        self.hub_model_id = None
+        if self.args.push_to_hub:
+            self.init_hf_repo()
+        if self.args.should_save:
+            os.makedirs(self.args.output_dir, exist_ok=True)
+        self.backup_model = None
+
+        # Add tags for models that have been loaded with the correct transformers version
+        if hasattr(self.model, "add_model_tags"):
+            self.model.add_model_tags(self._tag_names)
+
+        #########
+        ### setup dataloader
+        #########
+        self.dataloader = DataLoader(
+            self.train_dataset,
+            batch_size=self.local_dataloader_batch_size,
+            shuffle=True,
+            collate_fn=self.data_collator,
+            drop_last=True,  # needed; otherwise the last batch will be of ragged shape
+        )
+        # sync random states for DataLoader[shuffle=True] before `accelerator.prepare`
+        # see https://gist.github.com/vwxyzjn/2581bff1e48e185e0b85b6dfe1def79c
+        torch.manual_seed(args.seed)
+        self.model, self.optimizer, self.dataloader = accelerator.prepare(self.model, self.optimizer, self.dataloader)
+        torch.manual_seed(self.local_seed)  # reset the local seed again
+
+        self.eval_dataloader = DataLoader(
+            self.eval_dataset,
+            batch_size=args.per_device_eval_batch_size,
+            collate_fn=self.data_collator,
+            drop_last=True,
+        )  # no need to shuffle eval dataset
+        self.eval_dataloader = accelerator.prepare(self.eval_dataloader)
+
+        if self.is_deepspeed_enabled:
+            if isinstance(self.reward_model, nn.Module):
+                self.reward_model = prepare_deepspeed(
+                    self.reward_model, args.per_device_train_batch_size, args.fp16, args.bf16
+                )
+            self.ref_policy = prepare_deepspeed(
+                self.ref_policy, args.per_device_train_batch_size, args.fp16, args.bf16
+            )
+            self.deepspeed = self.model
+        else:
+            self.ref_policy = self.ref_policy.to(self.accelerator.device)
+            if isinstance(self.reward_model, nn.Module):
+                self.reward_model = self.reward_model.to(self.accelerator.device)
+
+    def get_train_dataloader(self) -> DataLoader:
+        return self.dataloader
+
+    def get_eval_dataloader(self) -> DataLoader:
+        return self.eval_dataloader
+
+    def train(self):
+        args = self.args
+        accelerator = self.accelerator
+        optimizer = self.optimizer
+        model = self.model
+        self.model_wrapped = self.model
+        ref_policy = self.ref_policy
+        reward_model = self.reward_model
+        processing_class = self.processing_class
+        dataloader = self.dataloader
+        device = accelerator.device
+
+        def repeat_generator():
+            while True:
+                yield from dataloader
+
+        iter_dataloader = iter(repeat_generator())
+        generation_config = GenerationConfig(
+            max_new_tokens=args.response_length,
+            temperature=(args.temperature + 1e-7),
+            top_k=0.0,
+            top_p=1.0,
+            do_sample=True,
+        )
+
+        accelerator.print("===training policy===")
+        start_time = time.time()
+        stats_shape = (args.num_ppo_epochs, args.num_mini_batches, args.gradient_accumulation_steps)
+        approxkl_stats = torch.zeros(stats_shape, device=device)
+        pg_clipfrac_stats = torch.zeros(stats_shape, device=device)
+        pg_loss_stats = torch.zeros(stats_shape, device=device)
+        vf_clipfrac_stats = torch.zeros(stats_shape, device=device)
+        entropy_stats = torch.zeros(stats_shape, device=device)
+        ratio_stats = torch.zeros(stats_shape, device=device)
+        model.train()
+
+        # trainer state initialization
+        self.state.global_step = 0
+        self.state.episode = 0
+        self.state.max_steps = (args.num_total_batches * args.num_mini_batches) // 2
+        self.state.num_train_epochs = args.total_episodes / self.train_dataset_len
+        # Compute absolute values for logging, eval, and save if given as ratio
+        if args.logging_steps is not None:
+            if args.logging_steps < 1:
+                self.state.logging_steps = math.ceil(self.state.max_steps * args.logging_steps)
+            else:
+                self.state.logging_steps = args.logging_steps
+        if args.eval_steps is not None:
+            if args.eval_steps < 1:
+                self.state.eval_steps = math.ceil(self.state.max_steps * args.eval_steps)
+            else:
+                self.state.eval_steps = args.eval_steps
+        if args.save_steps is not None:
+            if args.save_steps < 1:
+                self.state.save_steps = math.ceil(self.state.max_steps * args.save_steps)
+            else:
+                self.state.save_steps = args.save_steps
+        self.control = self.callback_handler.on_train_begin(args, self.state, self.control)
+
+        for update in range(1, args.num_total_batches + 1):
+            self.state.episode += 1 * args.batch_size
+            data = next(iter_dataloader)
+            with torch.no_grad():
+                queries = data["input_ids"].to(device)
+                queries = queries.repeat(args.rloo_k, 1)
+                context_length = queries.shape[1]
+                responses = []
+                postprocessed_responses = []
+                logprobs = []
+                ref_logprobs = []
+                scores = []
+                sequence_lengths = []
+
+                # Generate responses and compute logprobs
+                with unwrap_model_for_generation(
+                    self.model, self.accelerator, gather_deepspeed3_params=self.args.ds3_gather_for_generation
+                ) as unwrapped_model:
+                    query_responses, logitss = batch_generation(
+                        unwrapped_model,
+                        queries,
+                        args.local_rollout_forward_batch_size,
+                        processing_class.pad_token_id,
+                        generation_config,
+                    )
+
+                # Process responses in batches
+                for i in range(0, queries.shape[0], args.local_rollout_forward_batch_size):
+                    query = queries[i : i + args.local_rollout_forward_batch_size]
+                    query_response = query_responses[i : i + args.local_rollout_forward_batch_size]
+                    response = query_response[:, context_length:]
+                    logits = logitss[i : i + args.local_rollout_forward_batch_size]
+                    logprob = selective_log_softmax(logits, response)
+                    del logits
+                    empty_cache()
+
+                    ref_output = forward(ref_policy, query_response, processing_class.pad_token_id)
+                    ref_logits = ref_output.logits[:, context_length - 1 : -1]
+                    ref_logits /= args.temperature + 1e-7
+                    ref_logprob = selective_log_softmax(ref_logits, response)
+                    del ref_output, ref_logits
+                    empty_cache()
+
+                    # Response Processing 1. truncate response after the first occurrence of `stop_token_id`
+                    postprocessed_response = response
+                    if args.stop_token_id is not None:  # handle the edge case when stop_token_id exists but is 0
+                        postprocessed_response = truncate_response(
+                            args.stop_token_id, processing_class.pad_token_id, response
+                        )
+
+                    # Response Processing 2. run reward model on the truncated responses
+                    postprocessed_query_response = torch.cat((query, postprocessed_response), 1)
+                    sequence_length = first_true_indices(postprocessed_response == processing_class.pad_token_id) - 1
+
+                    if isinstance(reward_model, nn.Module):
+                        _, score, _ = get_reward(
+                            reward_model, postprocessed_query_response, processing_class.pad_token_id, context_length
+                        )
+                    else:
+                        score = torch.tensor(
+                            reward_model(
+                                processing_class.batch_decode(postprocessed_query_response, skip_special_tokens=True)
+                            ),
+                            dtype=torch.float,
+                        ).to(device)
+
+                    # Store batch results
+                    responses.append(response)
+                    postprocessed_responses.append(postprocessed_response)
+                    logprobs.append(logprob)
+                    ref_logprobs.append(ref_logprob)
+                    sequence_lengths.append(sequence_length)
+                    scores.append(score)
+
+                # Concatenate all batched results
+                responses = torch.cat(responses, 0)
+                postprocessed_responses = torch.cat(postprocessed_responses, 0)
+                logprobs = torch.cat(logprobs, 0)
+                ref_logprobs = torch.cat(ref_logprobs, 0)
+                sequence_lengths = torch.cat(sequence_lengths, 0)
+                scores = torch.cat(scores, 0)
+                del (logprob, ref_logprob, score)
+                empty_cache()
+                gc.collect()
+
+                # Response Processing 3. filter response. Ensure that the sample contains stop_token_id
+                # responses not passing that filter will receive a low (fixed) score
+                # only query humans on responses that pass that filter
+                contain_eos_token = torch.any(postprocessed_responses == processing_class.eos_token_id, dim=-1)
+                if args.missing_eos_penalty is not None:
+                    scores[~contain_eos_token] -= self.args.missing_eos_penalty
+                # accelerator.print(f"{scores=}, {(contain_eos_token.sum() / len(contain_eos_token))=}")
+
+                # be very careful with `padding_mask_p1`; see https://excalidraw.com/#json=LWnzG4w2k5DjF_EOL_xPt,e2w3a-hFJ_gX5vOfeyXGTw
+                response_idxs = torch.arange(responses.shape[1], device=responses.device).repeat(responses.shape[0], 1)
+                padding_mask = response_idxs > sequence_lengths.unsqueeze(1)
+                logprobs = torch.masked_fill(logprobs, padding_mask, INVALID_LOGPROB)
+                ref_logprobs = torch.masked_fill(ref_logprobs, padding_mask, INVALID_LOGPROB)
+
+                # 4. compute rewards
+                # Compute KL divergence
+                kl = logprobs - ref_logprobs
+
+                # Normalize rewards
+                if args.normalize_reward:
+                    scores = (scores - scores.mean()) / (scores.std() + 1e-8)
+                    scores = torch.clamp(scores, -args.reward_clip_range, args.reward_clip_range)
+
+                # Compute total reward with KL penalty
+                if args.token_level_kl:
+                    # Token-level KL penalty: apply KL penalty per token
+                    kl_reward = -args.kl_coef * kl
+
+                    # Get the index of the last non-padded token for each sequence
+                    eos_indices = padding_mask.size(1) - 1 - padding_mask.long().fliplr().argmax(dim=1, keepdim=True)
+                    last_reward = torch.zeros_like(kl)
+                    # Ensure scores has correct shape and type
+                    scores_shaped = scores.reshape(-1, 1).to(kl.dtype)
+                    last_reward.scatter_(dim=1, index=eos_indices, src=scores_shaped)
+
+                    # Combine KL reward and last reward
+                    non_score_reward = kl_reward.sum(1)  # Keep this for logging
+                    reward = last_reward + kl_reward
+                    rlhf_reward = reward.sum(1)  # Sum across sequence length
+                else:
+                    # Sequence-level KL penalty: sum KL across tokens first
+                    sequence_kl = kl.sum(1)
+                    non_score_reward = -args.kl_coef * sequence_kl
+                    rlhf_reward = non_score_reward + scores
+
+                # vectorized RLOO advantages implementation
+                rlhf_reward = rlhf_reward.reshape(args.rloo_k, -1)
+                baseline = (rlhf_reward.sum(0) - rlhf_reward) / (args.rloo_k - 1)
+                advantages = rlhf_reward - baseline
+                advantages = advantages.flatten()
+
+                # Normalize advantages
+                if args.normalize_advantage:
+                    advantages = (advantages - advantages.mean()) / (advantages.std() + 1e-8)
+
+                empty_cache()
+
+            # Do multiple epochs of PPO training, with a fresh random shuffle in each epoch
+            for ppo_epoch_idx in range(args.num_ppo_epochs):
+                b_inds = np.random.permutation(args.local_batch_size)
+                minibatch_idx = 0
+                for mini_batch_start in range(0, args.local_batch_size, args.local_mini_batch_size):
+                    mini_batch_end = mini_batch_start + args.local_mini_batch_size
+                    mini_batch_inds = b_inds[mini_batch_start:mini_batch_end]
+                    gradient_accumulation_idx = 0
+                    for micro_batch_start in range(0, args.local_mini_batch_size, args.per_device_train_batch_size):
+                        with accelerator.accumulate(model):
+                            micro_batch_end = micro_batch_start + args.per_device_train_batch_size
+                            micro_batch_inds = mini_batch_inds[micro_batch_start:micro_batch_end]
+
+                            # Get batch data
+                            mb_advantage = advantages[micro_batch_inds]
+                            mb_responses = responses[micro_batch_inds]
+                            mb_query_responses = query_responses[micro_batch_inds]
+                            mb_logprobs = logprobs[micro_batch_inds]
+
+                            # Forward pass
+                            output = forward(model, mb_query_responses, processing_class.pad_token_id)
+                            logits = output.logits[:, context_length - 1 : -1]
+                            logits /= args.temperature + 1e-7
+
+                            # Compute new logprobs
+                            new_logprobs = selective_log_softmax(logits, mb_responses)
+                            new_logprobs = torch.masked_fill(
+                                new_logprobs, padding_mask[micro_batch_inds], INVALID_LOGPROB
+                            )
+
+                            # Compute probability ratios
+                            new_ratio = (new_logprobs - mb_logprobs).exp()
+                            new_logprobs = new_logprobs.sum(1)
+                            mb_logprobs = mb_logprobs.sum(1)
+                            logprobs_diff = new_logprobs - mb_logprobs
+                            ratio = torch.exp(logprobs_diff)
+
+                            # PPO clipped loss
+                            pg_losses = -mb_advantage * ratio
+                            pg_losses2 = -mb_advantage * torch.clamp(ratio, 1.0 - args.cliprange, 1.0 + args.cliprange)
+                            pg_loss_max = torch.max(pg_losses, pg_losses2)
+                            pg_loss = pg_loss_max.mean()
+
+                            # Final loss
+                            loss = pg_loss
+
+                            # Optimization step
+                            accelerator.backward(loss)
+                            optimizer.step()
+                            optimizer.zero_grad()
+
+                            with torch.no_grad():
+                                pg_clipfrac = (pg_losses2 > pg_losses).float().mean()
+                                prob_dist = torch.nn.functional.softmax(logits, dim=-1, dtype = torch.float32).to(logits.dtype)
+                                entropy = torch.logsumexp(logits, dim=-1) - torch.sum(prob_dist * logits, dim=-1)
+                                approxkl = 0.5 * (logprobs_diff**2).mean()
+                                approxkl_stats[ppo_epoch_idx, minibatch_idx, gradient_accumulation_idx] = approxkl
+                                pg_clipfrac_stats[ppo_epoch_idx, minibatch_idx, gradient_accumulation_idx] = (
+                                    pg_clipfrac
+                                )
+                                pg_loss_stats[ppo_epoch_idx, minibatch_idx, gradient_accumulation_idx] = pg_loss
+                                entropy_stats[ppo_epoch_idx, minibatch_idx, gradient_accumulation_idx] = entropy.mean()
+                                ratio_stats[ppo_epoch_idx, minibatch_idx, gradient_accumulation_idx] = new_ratio.mean()
+                        gradient_accumulation_idx += 1
+                    minibatch_idx += 1
+
+                    # del everything and empty cache
+                    # fmt: off
+                    del (
+                        output, logits, new_logprobs, logprobs_diff, ratio, pg_losses,
+                        pg_losses2, pg_loss, loss, pg_clipfrac, prob_dist, entropy, approxkl,
+                        mb_advantage, mb_responses, mb_query_responses, mb_logprobs,
+                    )
+                    # fmt: on
+                    empty_cache()
+
+            # Compute metrics
+            with torch.no_grad():
+                mean_kl = kl.sum(1).mean()
+                mean_entropy = (-logprobs).sum(1).mean()
+                mean_non_score_reward = non_score_reward.mean()
+                eps = int(self.state.episode / (time.time() - start_time))
+                metrics = {}
+                metrics["eps"] = eps
+                metrics["objective/kl"] = self.accelerator.gather_for_metrics(mean_kl).mean().item()
+                metrics["objective/entropy"] = self.accelerator.gather_for_metrics(mean_entropy).mean().item()
+                metrics["objective/non_score_reward"] = (
+                    self.accelerator.gather_for_metrics(mean_non_score_reward).mean().item()
+                )
+                metrics["objective/rlhf_reward"] = self.accelerator.gather_for_metrics(rlhf_reward).mean().item()
+                metrics["objective/scores"] = self.accelerator.gather_for_metrics(scores.mean()).mean().item()
+                metrics["policy/approxkl_avg"] = self.accelerator.gather_for_metrics(approxkl_stats).mean().item()
+                metrics["policy/clipfrac_avg"] = self.accelerator.gather_for_metrics(pg_clipfrac_stats).mean().item()
+                metrics["loss/policy_avg"] = self.accelerator.gather_for_metrics(pg_loss_stats).mean().item()
+                metrics["val/clipfrac_avg"] = self.accelerator.gather_for_metrics(vf_clipfrac_stats).mean().item()
+                metrics["policy/entropy_avg"] = self.accelerator.gather_for_metrics(entropy_stats).mean().item()
+                metrics["val/ratio"] = self.accelerator.gather_for_metrics(ratio_stats).mean().item()
+                metrics["val/ratio_var"] = self.accelerator.gather_for_metrics(ratio_stats).var().item()
+                metrics["val/num_eos_tokens"] = (responses == processing_class.eos_token_id).sum().item()
+                metrics["lr"] = self.lr_scheduler.get_last_lr()[0]
+                metrics["episode"] = self.state.episode
+                self.state.epoch = self.state.episode / (args.rloo_k * self.train_dataset_len)  # used by self.log
+                self.log(metrics)
+            del kl, mean_kl, mean_entropy, scores
+
+            self.lr_scheduler.step()
+            self.state.global_step += 1
+            self.control = self.callback_handler.on_step_end(args, self.state, self.control)
+            if self.control.should_save:
+                self._save_checkpoint(model, trial=None)
+                self.control = self.callback_handler.on_save(self.args, self.state, self.control)
+            empty_cache()
+            gc.collect()
+
+            if args.num_sample_generations > 0 and (update - 1) % self.sample_generations_freq == 0:
+                self.generate_completions(sampling=True)
+
+        # HF trainer specifics
+        self.control = self.callback_handler.on_train_end(args, self.state, self.control)
+        if self.control.should_save:
+            self._save_checkpoint(model, trial=None, metrics=None)
+            self.control = self.callback_handler.on_save(self.args, self.state, self.control)
+
+    def generate_completions(self, sampling: bool = False):
+        args = self.args
+        processing_class = self.processing_class
+        generation_config = GenerationConfig(
+            max_new_tokens=self.args.response_length,
+            temperature=(0.01 + 1e-7),
+            top_k=0.0,
+            top_p=1.0,
+            do_sample=True,
+        )
+
+        table = defaultdict(list)
+        with unwrap_model_for_generation(
+            self.model, self.accelerator, gather_deepspeed3_params=self.args.ds3_gather_for_generation
+        ) as unwrapped_model:
+            for batch in self.eval_dataloader:
+                query = batch["input_ids"]
+                with torch.no_grad():
+                    context_length = query.shape[1]
+                    query_response, _ = batch_generation(
+                        unwrapped_model,
+                        query,
+                        query.shape[0],
+                        processing_class.pad_token_id,
+                        generation_config,
+                    )
+                    response = query_response[:, context_length:]
+                    postprocessed_response = response
+                    if args.stop_token_id is not None:  # handle the edge case when stop_token_id exists but is 0
+                        postprocessed_response = truncate_response(
+                            args.stop_token_id, processing_class.pad_token_id, response
+                        )
+                    table["query"].extend(
+                        gather_object(processing_class.batch_decode(query, skip_special_tokens=True))
+                    )
+                    table["model response"].extend(
+                        gather_object(processing_class.batch_decode(postprocessed_response))
+                    )
+
+                    postprocessed_query_response = torch.cat((query, postprocessed_response), 1)
+
+                    if isinstance(self.reward_model, nn.Module):
+                        _, score, _ = get_reward(
+                            self.reward_model,
+                            postprocessed_query_response,
+                            processing_class.pad_token_id,
+                            context_length,
+                        )
+                    else:
+                        score = torch.tensor(
+                            self.reward_model(
+                                processing_class.batch_decode(postprocessed_query_response, skip_special_tokens=True)
+                            ),
+                            dtype=torch.float,
+                        ).to(postprocessed_query_response.device)
+                    table["score"].extend(self.accelerator.gather_for_metrics(score).float().cpu().numpy())
+
+                if sampling:
+                    break
+        df = pd.DataFrame(table)
+
+        if self.accelerator.is_main_process:
+            if is_rich_available():
+                print_rich_table(df.iloc[0 : 0 + 5])
+            if "wandb" in args.report_to:
+                import wandb
+
+                if wandb.run is not None:
+                    wandb.log({"completions": wandb.Table(dataframe=df)})
+
+            if "comet_ml" in args.report_to:
+                log_table_to_comet_experiment(
+                    name="completions.csv",
+                    table=df,
+                )
+
+    # Ensure the model card is saved along with the checkpoint
+    def _save_checkpoint(self, model, trial):
+        if self.args.hub_model_id is None:
+            model_name = Path(self.args.output_dir).name
+        else:
+            model_name = self.args.hub_model_id.split("/")[-1]
+        self.create_model_card(model_name=model_name)
+        super()._save_checkpoint(model, trial)
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        citation = textwrap.dedent("""\
+        @inproceedings{ahmadian2024back,
+            title        = {{Back to Basics: Revisiting REINFORCE-Style Optimization for Learning from Human Feedback in LLMs}},
+            author       = {Arash Ahmadian and Chris Cremer and Matthias Gall{\'{e}} and Marzieh Fadaee and Julia Kreutzer and Olivier Pietquin and Ahmet {\"{U}}st{\"{u}}n and Sara Hooker},
+            year         = 2024,
+            booktitle    = {Proceedings of the 62nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers), {ACL} 2024, Bangkok, Thailand, August 11-16, 2024},
+            publisher    = {Association for Computational Linguistics},
+            pages        = {12248--12267},
+            editor       = {Lun{-}Wei Ku and Andre Martins and Vivek Srikumar},
+        }""")
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="RLOO",
+            trainer_citation=citation,
+            paper_title="Back to Basics: Revisiting REINFORCE-Style Optimization for Learning from Human Feedback in LLMs",
+            paper_id="2402.14740",
+        )
+
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothRLOOTrainer(_UnslothRLOOTrainer):
+    """
+    
+    """
+    def __init__(
+        self,
+        config,
+        processing_class,
+        policy,
+        ref_policy,
+        reward_model,
+        train_dataset,
+        data_collator = None,
+        eval_dataset = None,
+        callbacks = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothRLOOConfig()
+        _output_logits = False
+        if locals().get('compute_metrics', None) is not None: _output_logits = True
+        if locals().get('preprocess_logits_for_metrics', None) is not None: _output_logits = True
+        if _output_logits:
+            os.environ['UNSLOTH_RETURN_LOGITS'] = '1'
+        if 'max_seq_length' not in locals() and not hasattr(args, 'max_seq_length'):
+            pass
+        else:
+            model_max_seq_length = getattr(model, 'max_seq_length', None)
+            args_max_seq_length  = getattr(args,  'max_seq_length', None)
+            if args_max_seq_length is None and model_max_seq_length is not None:
+                max_seq_length = model.max_seq_length
+                if hasattr(args, 'max_seq_length'): args.max_seq_length = max_seq_length
+        if model is not None and hasattr(model, 'for_training'):
+            model.for_training()
+        if 'tokenizer' in locals() and hasattr(tokenizer, 'padding_side'): tokenizer.padding_side = 'right'
+        if 'processing_class' in locals():
+            if hasattr(processing_class, 'padding_side'): processing_class.padding_side = 'right'
+            if hasattr(processing_class, 'tokenizer') and hasattr(processing_class.tokenizer, 'padding_side'): processing_class.tokenizer.padding_side = 'right'
+        __tokenizer = processing_class if 'processing_class' in locals() else tokenizer
+        from unsloth_zoo.vision_utils import UnslothVisionDataCollator
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if isinstance(data_collator, DataCollatorForSeq2Seq) and 'labels' not in train_dataset.column_names:
+                data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False, mlm_probability = 0.0)
+            elif isinstance(data_collator, TransformersDataCollatorForLanguageModeling) and 'labels' in train_dataset.column_names:
+                data_collator = DataCollatorForSeq2Seq(__tokenizer)
+        else:
+            if hasattr(args, 'remove_unused_columns'): args.remove_unused_columns = False
+            if hasattr(args, 'dataset_text_field'): args.dataset_text_field = ''
+            if hasattr(args, 'dataset_kwargs'): args.dataset_kwargs = {'skip_prepare_dataset': True}
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if not hasattr(__tokenizer, 'pad') and hasattr(__tokenizer, 'tokenizer'):
+                if isinstance(data_collator, DataCollatorForSeq2Seq):
+                    data_collator = DataCollatorForSeq2Seq(__tokenizer.tokenizer)
+                else:
+                    data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False, mlm_probability = 0.0)
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('rloo_trainer', other_metrics)
+        
+        super().__init__(
+            config = config,
+            processing_class = processing_class,
+            policy = policy,
+            ref_policy = ref_policy,
+            reward_model = reward_model,
+            train_dataset = train_dataset,
+            data_collator = data_collator,
+            eval_dataset = eval_dataset,
+            callbacks = callbacks,**kwargs)
+        if hasattr(self, 'neftune_hook_handle'):
+            self.neftune_hook_handle.remove()
+            if hasattr(self, 'neftune_hook_handle'): del self.neftune_hook_handle
+        if getattr(args, 'neftune_noise_alpha', None) is not None:
+            model.get_input_embeddings().neftune_noise_alpha = self.neftune_noise_alpha
+        pass
+        if hasattr(self, 'accelerator'):
+            scaler = self.accelerator.scaler
+            current_model = model
+            while hasattr(current_model, 'model'):
+                current_model.accelerator_scaler = scaler
+                current_model = current_model.model
+            current_model.accelerator_scaler = scaler
+        pass
+        
+pass

unsloth_compiled_cache/UnslothRewardTrainer.py

@@ -0,0 +1,866 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.reward_trainer import (Any, BaseImageProcessor, Callable, DataCollator, Dataset, EvalPrediction, FeatureExtractionMixin, FrozenInstanceError, Optional, PartialState, Path, PeftModel, PreTrainedModel, PreTrainedTokenizerBase, ProcessorMixin, RewardConfig, RewardDataCollatorWithPadding, RewardTrainer, Trainer, TrainerCallback, Union, _tokenize, compute_accuracy, decode_and_strip_padding, defaultdict, disable_dropout_in_model, gather_object, generate_model_card, get_comet_experiment_url, inspect, is_peft_available, is_rich_available, is_wandb_available, log_table_to_comet_experiment, maybe_apply_chat_template, nested_detach, nn, os, pd, prepare_model_for_kbit_training, print_rich_table, replace, torch, wandb, warnings, Optional, PeftModel, PreTrainedModel, Trainer, is_peft_available, os, torch)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothRewardConfig(RewardConfig):
+    """
+    
+    Configuration class for the [`RewardTrainer`].
+
+    This class includes only the parameters that are specific to Reward training. For a full list of training
+    arguments, please refer to the [`~transformers.TrainingArguments`] documentation. Note that default values in this
+    class may differ from those in [`~transformers.TrainingArguments`].
+
+    Using [`~transformers.HfArgumentParser`] we can turn this class into
+    [argparse](https://docs.python.org/3/library/argparse#module-argparse) arguments that can be specified on the
+    command line.
+
+    Parameters:
+        max_length (`int` or `None`, *optional*, defaults to `1024`):
+            Maximum length of the sequences (prompt + completion) in the batch, filters out entries that exceed the
+            limit. This argument is required if you want to use the default data collator.
+        disable_dropout (`bool`, *optional*, defaults to `True`):
+            Whether to disable dropout in the model.
+        dataset_num_proc (`int`, *optional*, defaults to `None`):
+            Number of processes to use for processing the dataset.
+        center_rewards_coefficient (`float`, *optional*, defaults to `None`):
+            Coefficient to incentivize the reward model to output mean-zero rewards (proposed by
+            https://huggingface.co/papers/2312.09244, Eq. 2). Recommended value: `0.01`.
+        remove_unused_columns (`bool`, *optional*, defaults to `False`):
+            Whether to remove the columns that are not used by the model's forward pass. Can be `True` only if the
+            dataset is pretokenized.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    max_seq_length : Optional[int] = field(
+        default = None,
+        metadata = {'help': 'Maximum sequence length to truncate to.'},
+    )
+    def __init__(
+        self,
+        output_dir = None,
+        overwrite_output_dir = None,
+        do_train = False,
+        do_eval = False,
+        do_predict = False,
+        eval_strategy = 'no',
+        prediction_loss_only = False,
+        per_device_train_batch_size = 4,
+        per_device_eval_batch_size = 4,
+        per_gpu_train_batch_size = None,
+        per_gpu_eval_batch_size = None,
+        gradient_accumulation_steps = 2,
+        eval_accumulation_steps = 2,
+        eval_delay = 0,
+        torch_empty_cache_steps = 250,
+        learning_rate = 5e-05,
+        weight_decay = 0.01,
+        adam_beta1 = 0.9,
+        adam_beta2 = 0.999,
+        adam_epsilon = 1e-08,
+        max_grad_norm = 1.0,
+        num_train_epochs = 3.0,
+        max_steps = -1,
+        lr_scheduler_type = 'linear',
+        warmup_ratio = 0.1,
+        warmup_steps = 0,
+        log_level = 'passive',
+        log_level_replica = 'warning',
+        log_on_each_node = True,
+        logging_dir = None,
+        logging_strategy = 'steps',
+        logging_first_step = False,
+        logging_steps = 1,
+        logging_nan_inf_filter = False,
+        save_strategy = 'steps',
+        save_steps = 500,
+        save_total_limit = None,
+        save_safetensors = True,
+        save_on_each_node = False,
+        save_only_model = False,
+        restore_callback_states_from_checkpoint = False,
+        no_cuda = False,
+        use_cpu = False,
+        use_mps_device = False,
+        seed = 3407,
+        data_seed = 3407,
+        jit_mode_eval = False,
+        use_ipex = False,
+        bf16 = False,
+        fp16 = False,
+        fp16_opt_level = 'O1',
+        half_precision_backend = 'auto',
+        bf16_full_eval = False,
+        fp16_full_eval = False,
+        tf32 = None,
+        local_rank = -1,
+        ddp_backend = None,
+        tpu_num_cores = None,
+        tpu_metrics_debug = False,
+        debug = '',
+        dataloader_drop_last = False,
+        eval_steps = None,
+        dataloader_num_workers = 0,
+        dataloader_prefetch_factor = None,
+        past_index = -1,
+        run_name = None,
+        disable_tqdm = None,
+        remove_unused_columns = False,
+        label_names = None,
+        load_best_model_at_end = False,
+        metric_for_best_model = None,
+        greater_is_better = None,
+        ignore_data_skip = False,
+        fsdp = '',
+        fsdp_min_num_params = 0,
+        fsdp_config = None,
+        fsdp_transformer_layer_cls_to_wrap = None,
+        accelerator_config = None,
+        deepspeed = None,
+        label_smoothing_factor = 0.0,
+        optim = 'adamw_8bit',
+        optim_args = None,
+        adafactor = False,
+        group_by_length = False,
+        length_column_name = 'length',
+        report_to = None,
+        ddp_find_unused_parameters = None,
+        ddp_bucket_cap_mb = None,
+        ddp_broadcast_buffers = None,
+        dataloader_pin_memory = True,
+        dataloader_persistent_workers = False,
+        skip_memory_metrics = True,
+        use_legacy_prediction_loop = False,
+        push_to_hub = False,
+        resume_from_checkpoint = None,
+        hub_model_id = None,
+        hub_strategy = 'every_save',
+        hub_token = None,
+        hub_private_repo = None,
+        hub_always_push = False,
+        hub_revision = None,
+        gradient_checkpointing = False,
+        gradient_checkpointing_kwargs = None,
+        include_inputs_for_metrics = False,
+        eval_do_concat_batches = True,
+        fp16_backend = 'auto',
+        push_to_hub_model_id = None,
+        push_to_hub_organization = None,
+        push_to_hub_token = None,
+        mp_parameters = '',
+        auto_find_batch_size = True,
+        full_determinism = False,
+        torchdynamo = None,
+        ray_scope = 'last',
+        ddp_timeout = 1800,
+        torch_compile = False,
+        torch_compile_backend = None,
+        torch_compile_mode = None,
+        include_tokens_per_second = False,
+        include_num_input_tokens_seen = False,
+        neftune_noise_alpha = None,
+        optim_target_modules = None,
+        batch_eval_metrics = False,
+        eval_on_start = False,
+        use_liger_kernel = False,
+        liger_kernel_config = None,
+        eval_use_gather_object = False,
+        average_tokens_across_devices = True,
+        max_length = 1024,
+        disable_dropout = True,
+        dataset_num_proc = None,
+        center_rewards_coefficient = None,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        max_seq_length = None,
+        **kwargs,
+    ):
+        if learning_rate < 1e-7: raise FloatingPointError(f'Unsloth: Your learning rate of `{learning_rate}` is too small and less than 1e-7! Consider increasing it, otherwise gradient updates will be close to 0!')
+        if learning_rate > 1: raise OverflowError(f'Unsloth: Your learning rate of `{learning_rate}` is way too larger > 1! Consider decreasing it to 1e-1, otherwise gradient updates will explode!')
+        if output_dir is None and save_strategy == 'steps' and save_steps == 500:
+            output_dir = 'unsloth_training_checkpoints'
+            save_strategy = 'no'
+        if dataset_num_proc is None:
+            from multiprocessing import cpu_count
+            dataset_num_proc = min(cpu_count()*2, 2)
+        
+        super().__init__(
+            output_dir = output_dir,
+            overwrite_output_dir = overwrite_output_dir,
+            do_train = do_train,
+            do_eval = do_eval,
+            do_predict = do_predict,
+            eval_strategy = eval_strategy,
+            prediction_loss_only = prediction_loss_only,
+            per_device_train_batch_size = per_device_train_batch_size,
+            per_device_eval_batch_size = per_device_eval_batch_size,
+            per_gpu_train_batch_size = per_gpu_train_batch_size,
+            per_gpu_eval_batch_size = per_gpu_eval_batch_size,
+            gradient_accumulation_steps = gradient_accumulation_steps,
+            eval_accumulation_steps = eval_accumulation_steps,
+            eval_delay = eval_delay,
+            torch_empty_cache_steps = torch_empty_cache_steps,
+            learning_rate = learning_rate,
+            weight_decay = weight_decay,
+            adam_beta1 = adam_beta1,
+            adam_beta2 = adam_beta2,
+            adam_epsilon = adam_epsilon,
+            max_grad_norm = max_grad_norm,
+            num_train_epochs = num_train_epochs,
+            max_steps = max_steps,
+            lr_scheduler_type = lr_scheduler_type,
+            warmup_ratio = warmup_ratio,
+            warmup_steps = warmup_steps,
+            log_level = log_level,
+            log_level_replica = log_level_replica,
+            log_on_each_node = log_on_each_node,
+            logging_dir = logging_dir,
+            logging_strategy = logging_strategy,
+            logging_first_step = logging_first_step,
+            logging_steps = logging_steps,
+            logging_nan_inf_filter = logging_nan_inf_filter,
+            save_strategy = save_strategy,
+            save_steps = save_steps,
+            save_total_limit = save_total_limit,
+            save_safetensors = save_safetensors,
+            save_on_each_node = save_on_each_node,
+            save_only_model = save_only_model,
+            restore_callback_states_from_checkpoint = restore_callback_states_from_checkpoint,
+            no_cuda = no_cuda,
+            use_cpu = use_cpu,
+            use_mps_device = use_mps_device,
+            seed = seed,
+            data_seed = data_seed,
+            jit_mode_eval = jit_mode_eval,
+            use_ipex = use_ipex,
+            bf16 = bf16,
+            fp16 = fp16,
+            fp16_opt_level = fp16_opt_level,
+            half_precision_backend = half_precision_backend,
+            bf16_full_eval = bf16_full_eval,
+            fp16_full_eval = fp16_full_eval,
+            tf32 = tf32,
+            local_rank = local_rank,
+            ddp_backend = ddp_backend,
+            tpu_num_cores = tpu_num_cores,
+            tpu_metrics_debug = tpu_metrics_debug,
+            debug = debug,
+            dataloader_drop_last = dataloader_drop_last,
+            eval_steps = eval_steps,
+            dataloader_num_workers = dataloader_num_workers,
+            dataloader_prefetch_factor = dataloader_prefetch_factor,
+            past_index = past_index,
+            run_name = run_name,
+            disable_tqdm = disable_tqdm,
+            remove_unused_columns = remove_unused_columns,
+            label_names = label_names,
+            load_best_model_at_end = load_best_model_at_end,
+            metric_for_best_model = metric_for_best_model,
+            greater_is_better = greater_is_better,
+            ignore_data_skip = ignore_data_skip,
+            fsdp = fsdp,
+            fsdp_min_num_params = fsdp_min_num_params,
+            fsdp_config = fsdp_config,
+            fsdp_transformer_layer_cls_to_wrap = fsdp_transformer_layer_cls_to_wrap,
+            accelerator_config = accelerator_config,
+            deepspeed = deepspeed,
+            label_smoothing_factor = label_smoothing_factor,
+            optim = optim,
+            optim_args = optim_args,
+            adafactor = adafactor,
+            group_by_length = group_by_length,
+            length_column_name = length_column_name,
+            report_to = report_to,
+            ddp_find_unused_parameters = ddp_find_unused_parameters,
+            ddp_bucket_cap_mb = ddp_bucket_cap_mb,
+            ddp_broadcast_buffers = ddp_broadcast_buffers,
+            dataloader_pin_memory = dataloader_pin_memory,
+            dataloader_persistent_workers = dataloader_persistent_workers,
+            skip_memory_metrics = skip_memory_metrics,
+            use_legacy_prediction_loop = use_legacy_prediction_loop,
+            push_to_hub = push_to_hub,
+            resume_from_checkpoint = resume_from_checkpoint,
+            hub_model_id = hub_model_id,
+            hub_strategy = hub_strategy,
+            hub_token = hub_token,
+            hub_private_repo = hub_private_repo,
+            hub_always_push = hub_always_push,
+            hub_revision = hub_revision,
+            gradient_checkpointing = gradient_checkpointing,
+            gradient_checkpointing_kwargs = gradient_checkpointing_kwargs,
+            include_inputs_for_metrics = include_inputs_for_metrics,
+            eval_do_concat_batches = eval_do_concat_batches,
+            fp16_backend = fp16_backend,
+            push_to_hub_model_id = push_to_hub_model_id,
+            push_to_hub_organization = push_to_hub_organization,
+            push_to_hub_token = push_to_hub_token,
+            mp_parameters = mp_parameters,
+            auto_find_batch_size = auto_find_batch_size,
+            full_determinism = full_determinism,
+            torchdynamo = torchdynamo,
+            ray_scope = ray_scope,
+            ddp_timeout = ddp_timeout,
+            torch_compile = torch_compile,
+            torch_compile_backend = torch_compile_backend,
+            torch_compile_mode = torch_compile_mode,
+            include_tokens_per_second = include_tokens_per_second,
+            include_num_input_tokens_seen = include_num_input_tokens_seen,
+            neftune_noise_alpha = neftune_noise_alpha,
+            optim_target_modules = optim_target_modules,
+            batch_eval_metrics = batch_eval_metrics,
+            eval_on_start = eval_on_start,
+            use_liger_kernel = use_liger_kernel,
+            liger_kernel_config = liger_kernel_config,
+            eval_use_gather_object = eval_use_gather_object,
+            average_tokens_across_devices = average_tokens_across_devices,
+            max_length = max_length,
+            disable_dropout = disable_dropout,
+            dataset_num_proc = dataset_num_proc,
+            center_rewards_coefficient = center_rewards_coefficient,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        self.max_seq_length = max_seq_length
+pass
+
+class _UnslothRewardTrainer(Trainer):
+    _tag_names = ["trl", "reward-trainer"]
+
+    def __init__(
+        self,
+        model: Optional[Union[PreTrainedModel, nn.Module]] = None,
+        args: Optional[RewardConfig] = None,
+        data_collator: Optional[DataCollator] = None,
+        train_dataset: Optional[Dataset] = None,
+        eval_dataset: Optional[Union[Dataset, dict[str, Dataset]]] = None,
+        processing_class: Optional[
+            Union[PreTrainedTokenizerBase, BaseImageProcessor, FeatureExtractionMixin, ProcessorMixin]
+        ] = None,
+        model_init: Optional[Callable[[], PreTrainedModel]] = None,
+        compute_metrics: Optional[Callable[[EvalPrediction], dict]] = None,
+        callbacks: Optional[list[TrainerCallback]] = None,
+        optimizers: tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR] = (
+            None,
+            None,
+        ),
+        preprocess_logits_for_metrics: Optional[Callable[[torch.Tensor, torch.Tensor], torch.Tensor]] = None,
+        peft_config: Optional[dict] = None,
+    ):
+        """
+        Initialize RewardTrainer.
+
+        Args:
+            model (`transformers.PreTrainedModel`):
+                The model to train, preferably an `AutoModelForSequenceClassification`.
+            args (`RewardConfig`):
+                The arguments to use for training.
+            data_collator (`transformers.DataCollator`):
+                The data collator to use for training. If None is specified, the default data collator
+                (`RewardDataCollatorWithPadding`) will be used which will pad the sequences to the maximum length of
+                the sequences in the batch, given a dataset of paired sequences.
+            train_dataset (`datasets.Dataset`):
+                The dataset to use for training.
+            eval_dataset (`datasets.Dataset`):
+                The dataset to use for evaluation.
+            processing_class ([`~transformers.PreTrainedTokenizerBase`], [`~transformers.BaseImageProcessor`], [`~transformers.FeatureExtractionMixin`] or [`~transformers.ProcessorMixin`], *optional*, defaults to `None`):
+                Processing class used to process the data. If provided, will be used to automatically process the
+                inputs for the model, and it will be saved along the model to make it easier to rerun an interrupted
+                training or reuse the fine-tuned model.
+            model_init (`Callable[[], transformers.PreTrainedModel]`):
+                The model initializer to use for training. If None is specified, the default model initializer will be
+                used.
+            compute_metrics (`Callable[[transformers.EvalPrediction], dict]`, *optional* defaults to `compute_accuracy`):
+                The metrics to use for evaluation. If no metrics are specified, the default metric (`compute_accuracy`)
+                will be used.
+            callbacks (`list[transformers.TrainerCallback]`):
+                The callbacks to use for training.
+            optimizers (`tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR]`):
+                The optimizer and scheduler to use for training.
+            preprocess_logits_for_metrics (`Callable[[torch.Tensor, torch.Tensor], torch.Tensor]`):
+                The function to use to preprocess the logits before computing the metrics.
+            peft_config (`dict`, defaults to `None`):
+                The PEFT configuration to use for training. If you pass a PEFT configuration, the model will be wrapped
+                in a PEFT model.
+        """
+        if not is_peft_available() and peft_config is not None:
+            raise ValueError(
+                "PEFT is not installed and you passed a `peft_config` in the trainer's kwargs, please install it to use the PEFT models"
+            )
+        elif is_peft_available() and peft_config is not None:
+            if not isinstance(model, PeftModel):
+                if getattr(model, "is_loaded_in_8bit", False) or getattr(model, "is_quantized", False):
+                    _supports_gc_kwargs = "gradient_checkpointing_kwargs" in list(
+                        inspect.signature(prepare_model_for_kbit_training).parameters
+                    )
+
+                    prepare_model_kwargs = {"use_gradient_checkpointing": args.gradient_checkpointing}
+
+                    if not _supports_gc_kwargs and args.gradient_checkpointing_kwargs is not None:
+                        warnings.warn(
+                            "You passed `gradient_checkpointing_kwargs` in the trainer's kwargs, but your peft version does not support it. "
+                            "please update to the latest version of peft to use `gradient_checkpointing_kwargs`.",
+                            UserWarning,
+                        )
+                    elif _supports_gc_kwargs and args.gradient_checkpointing_kwargs is not None:
+                        prepare_model_kwargs["gradient_checkpointing_kwargs"] = args.gradient_checkpointing_kwargs
+
+                    model = prepare_model_for_kbit_training(model, **prepare_model_kwargs)
+
+                model = model
+
+        # Disable dropout in the model
+        if args.disable_dropout:
+            disable_dropout_in_model(model)
+
+        if compute_metrics is None:
+            compute_metrics = compute_accuracy
+
+        if data_collator is None:
+            if processing_class is None:
+                raise ValueError(
+                    "A processing_class must be specified when using the default RewardDataCollatorWithPadding"
+                )
+
+            max_length = args.max_length
+
+            data_collator = RewardDataCollatorWithPadding(processing_class)
+
+            if args.remove_unused_columns:
+                try:  # for bc before https://github.com/huggingface/transformers/pull/25435
+                    args.remove_unused_columns = False
+                except FrozenInstanceError:
+                    args = replace(args, remove_unused_columns=False)
+                # warn users
+                warnings.warn(
+                    "When using RewardDataCollatorWithPadding, you should set `remove_unused_columns=False` in your RewardConfig"
+                    " we have set it for you, but you should do it yourself in the future.",
+                    UserWarning,
+                )
+
+            self.use_reward_data_collator = True
+        else:
+            self.use_reward_data_collator = False
+
+        # The trainer estimates the number of FLOPs [floating-point operations] using the number of elements in the
+        # input tensor associated with the key "input_ids". However, in Reward, the sampled data does not include the
+        # "input_ids" key. Instead, the available keys are "input_ids_chosen" and "input_ids_rejected". As a result,
+        # the trainer issues the warning: "Could not estimate the number of tokens of the input, floating-point
+        # operations will not be computed." To suppress this warning, we set the "estimate_tokens" key in the model's
+        # "warnings_issued" dictionary to True. This acts as a flag to indicate that the warning has already been
+        # issued.
+        model.warnings_issued["estimate_tokens"] = True
+
+        if "input_ids_chosen" not in train_dataset.column_names:
+            with PartialState().main_process_first():
+                fn_kwargs = {"tokenizer": processing_class}
+                train_dataset = train_dataset.map(maybe_apply_chat_template, fn_kwargs={"tokenizer": processing_class})
+                train_dataset = train_dataset.map(
+                    _tokenize,
+                    batched=True,
+                    fn_kwargs=fn_kwargs,
+                    num_proc=args.dataset_num_proc,
+                )
+                # This filter is important because otherwise you get samples that exceed the model's context length and
+                # get truncated => noisy signal the chosen/rejected label gets lost. The downside is that the
+                # user might get surprised if N samples are missing from training.
+                train_dataset = train_dataset.filter(
+                    lambda x: len(x["input_ids_chosen"]) <= max_length and len(x["input_ids_rejected"]) <= max_length,
+                    num_proc=args.dataset_num_proc,
+                )
+                if eval_dataset is not None:
+                    eval_dataset = eval_dataset.map(
+                        maybe_apply_chat_template, fn_kwargs={"tokenizer": processing_class}
+                    )
+                    eval_dataset = eval_dataset.map(
+                        _tokenize,
+                        fn_kwargs=fn_kwargs,
+                        batched=True,
+                        num_proc=args.dataset_num_proc,
+                    )
+                    # This filter is important because otherwise you get samples that exceed the model's context length and
+                    # get truncated => noisy signal the chosen/rejected label gets lost. The downside is that the
+                    # user might get surprised if N samples are missing from training.
+                    eval_dataset = eval_dataset.filter(
+                        lambda x: len(x["input_ids_chosen"]) <= max_length
+                        and len(x["input_ids_rejected"]) <= max_length,
+                        num_proc=args.dataset_num_proc,
+                    )
+
+        super().__init__(
+            model=model,
+            args=args,
+            data_collator=data_collator,
+            train_dataset=train_dataset,
+            eval_dataset=eval_dataset,
+            processing_class=processing_class,
+            model_init=model_init,
+            compute_metrics=compute_metrics,
+            callbacks=callbacks,
+            optimizers=optimizers,
+            preprocess_logits_for_metrics=preprocess_logits_for_metrics,
+        )
+
+        # Add tags for models that have been loaded with the correct transformers version
+        if hasattr(self.model, "add_model_tags"):
+            self.model.add_model_tags(self._tag_names)
+
+    def compute_loss(
+        self,
+        model: Union[PreTrainedModel, nn.Module],
+        inputs: dict[str, Union[torch.Tensor, Any]],
+        return_outputs=False,
+        num_items_in_batch=None,
+    ) -> Union[torch.Tensor, tuple[torch.Tensor, dict[str, torch.Tensor]]]:
+        rewards_chosen = model(
+            input_ids=inputs["input_ids_chosen"],
+            attention_mask=inputs["attention_mask_chosen"],
+            return_dict=True,
+        )["logits"]
+        rewards_rejected = model(
+            input_ids=inputs["input_ids_rejected"],
+            attention_mask=inputs["attention_mask_rejected"],
+            return_dict=True,
+        )["logits"]
+        # calculate loss, optionally modulate with margin
+        if "margin" in inputs:
+            loss = -nn.functional.logsigmoid(rewards_chosen - rewards_rejected - inputs["margin"]).mean()
+        else:
+            loss = -nn.functional.logsigmoid(rewards_chosen - rewards_rejected).mean()
+
+        if self.args.center_rewards_coefficient is not None:
+            loss += self.args.center_rewards_coefficient * torch.mean((rewards_chosen + rewards_rejected) ** 2)
+
+        if return_outputs:
+            return loss, {
+                "rewards_chosen": rewards_chosen,
+                "rewards_rejected": rewards_rejected,
+            }
+        return loss
+
+    def prediction_step(
+        self,
+        model: Union[PreTrainedModel, nn.Module],
+        inputs: dict[str, Union[torch.Tensor, Any]],
+        prediction_loss_only: bool,
+        ignore_keys: Optional[list[str]] = None,
+    ) -> tuple[Optional[torch.Tensor], Optional[torch.Tensor], Optional[torch.Tensor]]:
+        inputs = self._prepare_inputs(inputs)
+        if ignore_keys is None:
+            if hasattr(self.model, "config"):
+                ignore_keys = getattr(self.model.config, "keys_to_ignore_at_inference", [])
+            else:
+                ignore_keys = []
+
+        with torch.no_grad():
+            loss, logits_dict = self.compute_loss(model, inputs, return_outputs=True)
+
+        if prediction_loss_only:
+            return (loss, None, None)
+
+        loss = loss.detach()
+        logits = tuple(v for k, v in logits_dict.items() if k not in ignore_keys)
+        logits = nested_detach(logits)
+        # Stack accepted against rejected, mean over logits
+        # and softmax to get preferences between accepted and rejected to sum to 1
+        logits = torch.stack(logits).mean(dim=2).softmax(dim=0).T
+
+        labels = torch.zeros(logits.shape[0])
+        labels = self._prepare_inputs(labels)
+
+        return loss, logits, labels
+
+    def evaluate(self, *args, **kwargs):
+        num_print_samples = kwargs.pop("num_print_samples", 4)
+        self.visualize_samples(num_print_samples)
+        return super().evaluate(*args, **kwargs)
+
+    def visualize_samples(self, num_print_samples: int):
+        """
+        Visualize the reward model logits prediction
+
+        Args:
+            num_print_samples (`int`, defaults to `4`):
+                The number of samples to print. Set to `-1` to print all samples.
+        """
+        eval_dataloader = self.get_eval_dataloader()
+        table = defaultdict(list)
+        for _, inputs in enumerate(eval_dataloader):
+            _, logits, _ = self.prediction_step(self.model, inputs, prediction_loss_only=False)
+            chosen_text = decode_and_strip_padding(inputs["input_ids_chosen"], self.processing_class)
+            rejected_text = decode_and_strip_padding(inputs["input_ids_rejected"], self.processing_class)
+            table["chosen_text"].extend(gather_object(chosen_text))
+            table["rejected_text"].extend(gather_object(rejected_text))
+            table["logits"].extend(
+                gather_object([[round(inner_item, 4) for inner_item in item] for item in logits.tolist()])
+            )
+            if num_print_samples >= 0 and len(table["chosen_text"]) >= num_print_samples:
+                break
+        df = pd.DataFrame(table)
+        if self.accelerator.process_index == 0:
+            if is_rich_available():
+                print_rich_table(df[:num_print_samples])
+            if "wandb" in self.args.report_to:
+                import wandb
+
+                if wandb.run is not None:
+                    wandb.log({"completions": wandb.Table(dataframe=df)})
+
+            if "comet_ml" in self.args.report_to:
+                log_table_to_comet_experiment(
+                    name="completions.csv",
+                    table=df,
+                )
+
+    # Ensure the model card is saved along with the checkpoint
+    def _save_checkpoint(self, model, trial):
+        if self.args.hub_model_id is None:
+            model_name = Path(self.args.output_dir).name
+        else:
+            model_name = self.args.hub_model_id.split("/")[-1]
+        self.create_model_card(model_name=model_name)
+        super()._save_checkpoint(model, trial)
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="Reward",
+        )
+
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothRewardTrainer(_UnslothRewardTrainer):
+    """
+    
+    """
+    def __init__(
+        self,
+        model = None,
+        args = None,
+        data_collator = None,
+        train_dataset = None,
+        eval_dataset = None,
+        processing_class = None,
+        model_init = None,
+        compute_metrics = None,
+        callbacks = None,
+        preprocess_logits_for_metrics = None,
+        peft_config = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothRewardConfig()
+        use_bf16 = getattr(args, 'bf16', False)
+        if type(use_bf16) is not bool: use_bf16 = False
+        use_fp16 = getattr(args, 'fp16', False)
+        if type(use_fp16) is not bool: use_fp16 = False
+        force_float32 = False
+        if os.environ.get('UNSLOTH_FORCE_FLOAT32', '0') == '1':
+            print('Unsloth: Switching to float32 training since model cannot work with float16')
+            force_float32 = True
+        mixed_precision_dtype = os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32')
+        dtype = getattr(model.config, 'torch_dtype', None)
+        if dtype is None: dtype = model.get_input_embeddings().dtype
+        from unsloth_zoo.utils import _get_dtype
+        dtype = _get_dtype(dtype)
+        float16 = dtype == torch.float16
+        if not force_float32 and (float16 and use_bf16): raise TypeError('Unsloth: Model is in float16 precision but you want to use bfloat16 precision. Set fp16 to `True` and bf16 to `False`')
+        if not force_float32 and (not float16 and use_fp16): raise TypeError('Unsloth: Model is in bfloat16 precision but you want to use float16 precision. Set fp16 to `False` and bf16 to `True`')
+        if force_float32:
+            args.fp16 = False
+            args.bf16 = False
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'no'
+        elif (not use_bf16 and not use_fp16) and mixed_precision_dtype == 'float32':
+            args.fp16 = float16
+            args.bf16 = not float16
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'fp16' if float16 else 'bf16'
+        if getattr(args, 'eval_dataset', None) is not None and getattr(args, 'eval_strategy', 'no') == 'no':
+            args.eval_strategy = 'steps'
+            if getattr(args, 'eval_steps', None) is None: args.eval_steps = 0.1
+        ga_steps = getattr(args, 'gradient_accumulation_steps', None)
+        if ga_steps is not None and ga_steps > 1:
+            from transformers import __version__ as transformers_version
+            if Version(transformers_version) <= Version('4.45.2'):
+                print('**** Unsloth: Please use our fixed gradient_accumulation_steps by updating transformers, TRL and Unsloth!\n'
+                      '`pip install --upgrade --no-cache-dir --force-reinstall --no-deps unsloth transformers trl unsloth_zoo`')
+        if getattr(args, 'eval_strategy', 'no') != 'no':
+            eval_bsz = getattr(args, 'per_device_eval_batch_size', 8)
+            if eval_bsz == 8 and args.per_device_train_batch_size < eval_bsz: args.per_device_eval_batch_size = args.per_device_train_batch_size
+            if getattr(args, 'eval_accumulation_steps', None) is None and ga_steps is not None: args.eval_accumulation_steps = ga_steps
+        fp16_full_eval = getattr(args, 'fp16_full_eval', False)
+        if type(fp16_full_eval) is not bool: fp16_full_eval = False
+        bf16_full_eval = getattr(args, 'bf16_full_eval', False)
+        if type(bf16_full_eval) is not bool: bf16_full_eval = False
+        if args.fp16 and bf16_full_eval: args.bf16_full_eval = False; args.fp16_full_eval = True
+        if args.bf16 and fp16_full_eval: args.bf16_full_eval = True; args.fp16_full_eval = False
+        if force_float32:
+            args.bf16_full_eval = False
+            args.fp16_full_eval = False
+        elif os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32') == 'bfloat16':
+            args.bf16_full_eval = True
+            args.fp16_full_eval = False
+        elif not bf16_full_eval and not fp16_full_eval:
+            args.bf16_full_eval = args.bf16
+            args.fp16_full_eval = args.fp16
+        _output_logits = False
+        if locals().get('compute_metrics', None) is not None: _output_logits = True
+        if locals().get('preprocess_logits_for_metrics', None) is not None: _output_logits = True
+        if _output_logits:
+            os.environ['UNSLOTH_RETURN_LOGITS'] = '1'
+        if 'max_seq_length' not in locals() and not hasattr(args, 'max_seq_length'):
+            pass
+        else:
+            model_max_seq_length = getattr(model, 'max_seq_length', None)
+            args_max_seq_length  = getattr(args,  'max_seq_length', None)
+            if args_max_seq_length is None and model_max_seq_length is not None:
+                max_seq_length = model.max_seq_length
+                if hasattr(args, 'max_seq_length'): args.max_seq_length = max_seq_length
+        if model is not None and hasattr(model, 'for_training'):
+            model.for_training()
+        if 'tokenizer' in locals() and hasattr(tokenizer, 'padding_side'): tokenizer.padding_side = 'right'
+        if 'processing_class' in locals():
+            if hasattr(processing_class, 'padding_side'): processing_class.padding_side = 'right'
+            if hasattr(processing_class, 'tokenizer') and hasattr(processing_class.tokenizer, 'padding_side'): processing_class.tokenizer.padding_side = 'right'
+        __tokenizer = processing_class if 'processing_class' in locals() else tokenizer
+        from unsloth_zoo.vision_utils import UnslothVisionDataCollator
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if isinstance(data_collator, DataCollatorForSeq2Seq) and 'labels' not in train_dataset.column_names:
+                data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False, mlm_probability = 0.0)
+            elif isinstance(data_collator, TransformersDataCollatorForLanguageModeling) and 'labels' in train_dataset.column_names:
+                data_collator = DataCollatorForSeq2Seq(__tokenizer)
+        else:
+            if hasattr(args, 'remove_unused_columns'): args.remove_unused_columns = False
+            if hasattr(args, 'dataset_text_field'): args.dataset_text_field = ''
+            if hasattr(args, 'dataset_kwargs'): args.dataset_kwargs = {'skip_prepare_dataset': True}
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if not hasattr(__tokenizer, 'pad') and hasattr(__tokenizer, 'tokenizer'):
+                if isinstance(data_collator, DataCollatorForSeq2Seq):
+                    data_collator = DataCollatorForSeq2Seq(__tokenizer.tokenizer)
+                else:
+                    data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False, mlm_probability = 0.0)
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('reward_trainer', other_metrics)
+        
+        super().__init__(
+            model = model,
+            args = args,
+            data_collator = data_collator,
+            train_dataset = train_dataset,
+            eval_dataset = eval_dataset,
+            processing_class = processing_class,
+            model_init = model_init,
+            compute_metrics = compute_metrics,
+            callbacks = callbacks,
+            preprocess_logits_for_metrics = preprocess_logits_for_metrics,
+            peft_config = peft_config,**kwargs)
+        if hasattr(self, 'neftune_hook_handle'):
+            self.neftune_hook_handle.remove()
+            if hasattr(self, 'neftune_hook_handle'): del self.neftune_hook_handle
+        if getattr(args, 'neftune_noise_alpha', None) is not None:
+            model.get_input_embeddings().neftune_noise_alpha = self.neftune_noise_alpha
+        pass
+        if hasattr(self, 'accelerator'):
+            scaler = self.accelerator.scaler
+            current_model = model
+            while hasattr(current_model, 'model'):
+                current_model.accelerator_scaler = scaler
+                current_model = current_model.model
+            current_model.accelerator_scaler = scaler
+        pass
+        
+pass

unsloth_compiled_cache/UnslothSFTTrainer.py

@@ -0,0 +1,1253 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.sft_trainer import (Any, AutoModelForCausalLM, AutoTokenizer, BaseImageProcessor, Callable, DataCollator, DataCollatorForLanguageModeling, Dataset, EvalPrediction, FeatureExtractionMixin, IterableDataset, Optional, Path, PeftConfig, PeftModel, PreTrainedModel, PreTrainedTokenizerBase, ProcessorMixin, SFTConfig, SFTTrainer, Trainer, TrainerCallback, TrainingArguments, Union, clone_chat_template, contextlib, dataclass, dataclasses, defaultdict, generate_model_card, get_act_offloading_ctx_manager, get_comet_experiment_url, get_peft_model, is_conversational, is_peft_available, is_wandb_available, nn, os, pack_dataset, pad, peft, peft_module_casting_to_bf16, prepare_model_for_kbit_training, torch, version, wandb, warnings, Callable, DataCollator, DataCollatorForLanguageModeling, Dataset, IterableDataset, Optional, Union, os, pack_dataset, pad, Optional, PeftModel, PreTrainedModel, Trainer, is_peft_available, os, peft, torch, os)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothSFTConfig(SFTConfig):
+    """
+    
+    Configuration class for the [`SFTTrainer`].
+
+    This class includes only the parameters that are specific to SFT training. For a full list of training arguments,
+    please refer to the [`~transformers.TrainingArguments`] documentation. Note that default values in this class may
+    differ from those in [`~transformers.TrainingArguments`].
+
+    Using [`~transformers.HfArgumentParser`] we can turn this class into
+    [argparse](https://docs.python.org/3/library/argparse#module-argparse) arguments that can be specified on the
+    command line.
+
+    Parameters:
+        > Parameters that control the model
+
+        model_init_kwargs (`dict[str, Any]` or `None`, *optional*, defaults to `None`):
+            Keyword arguments for [`~transformers.AutoModelForCausalLM.from_pretrained`], used when the `model`
+            argument of the [`SFTTrainer`] is provided as a string.
+        chat_template_path (`str` or `None`, *optional*, defaults to `None`):
+            If specified, sets the model's chat template. This can either be the path to a tokenizer (local directory
+            or Hugging Face Hub model) or a direct path to a Jinja template file. When using a Jinja file, you must
+            ensure that any special tokens referenced in the template are added to the tokenizer and that the model's
+            embedding layer is resized accordingly.
+
+        > Parameters that control the data preprocessing
+
+        dataset_text_field (`str`, *optional*, defaults to `"text"`):
+            Name of the column that contains text data in the dataset.
+        dataset_kwargs (`dict[str, Any]` or `None`, *optional*, defaults to `None`):
+            Dictionary of optional keyword arguments for the dataset preparation. The only supported key is
+            `skip_prepare_dataset`.
+        dataset_num_proc (`int` or `None`, *optional*, defaults to `None`):
+            Number of processes to use for processing the dataset.
+        eos_token (`str` or `None`, *optional*, defaults to `None`):
+            Token used to indicate the end of a turn or sequence. If `None`, it defaults to
+            `processing_class.eos_token`.
+        pad_token (`int` or `None`, *optional*, defaults to `None`):
+            Token used for padding. If `None`, it defaults to `processing_class.pad_token`, or if that is also `None`,
+            it falls back to `processing_class.eos_token`.
+        max_length (`int` or `None`, *optional*, defaults to `1024`):
+            Maximum length of the tokenized sequence. Sequences longer than `max_length` are truncated from the right.
+            If `None`, no truncation is applied. When packing is enabled, this value sets the sequence length.
+        packing (`bool`, *optional*, defaults to `False`):
+            Whether to group multiple sequences into fixed-length blocks to improve computational efficiency and reduce
+            padding. Uses `max_length` to define sequence length.
+        packing_strategy (`str`, *optional*, defaults to `"bfd"`):
+            Strategy for packing sequences. Can be either `"bfd"` (best-fit decreasing, default), or `"wrapped"`.
+        padding_free (`bool`, *optional*, defaults to `False`):
+            Whether to perform forward passes without padding by flattening all sequences in the batch into a single
+            continuous sequence. This reduces memory usage by eliminating padding overhead. Currently, this is only
+            supported with the FlashAttention 2 or 3, which can efficiently handle the flattened batch structure. When
+            packing is enabled with strategy `"bfd"`, padding-free is enabled, regardless of the value of this
+            parameter.
+        pad_to_multiple_of (`int` or `None`, *optional*, defaults to `None`):
+            If set, the sequences will be padded to a multiple of this value.
+        eval_packing (`bool` or `None`, *optional*, defaults to `None`):
+            Whether to pack the eval dataset. If `None`, uses the same value as `packing`.
+
+        > Parameters that control the training
+
+        completion_only_loss (`bool` or `None`, *optional*, defaults to `None`):
+            Whether to compute loss only on the completion part of the sequence. If set to `True`, loss is computed
+            only on the completion, which is supported only for [prompt-completion](#prompt-completion) datasets. If
+            `False`, loss is computed on the entire sequence. If `None` (default), the behavior depends on the dataset:
+            loss is computed on the completion for [prompt-completion](#prompt-completion) datasets, and on the full
+            sequence for [language modeling](#language-modeling) datasets.
+        assistant_only_loss (`bool`, *optional*, defaults to `False`):
+            Whether to compute loss only on the assistant part of the sequence. If set to `True`, loss is computed
+            only on the assistant responses, which is supported only for [conversational](#conversational) datasets. If `False`,
+            loss is computed on the entire sequence.
+        activation_offloading (`bool`, *optional*, defaults to `False`):
+            Whether to offload the activations to the CPU.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    max_seq_length : Optional[int] = field(
+        default = None,
+        metadata = {'help': 'Maximum sequence length to truncate to.'},
+    )
+    def __init__(
+        self,
+        output_dir = None,
+        overwrite_output_dir = None,
+        do_train = False,
+        do_eval = False,
+        do_predict = False,
+        eval_strategy = 'no',
+        prediction_loss_only = False,
+        per_device_train_batch_size = 4,
+        per_device_eval_batch_size = 4,
+        per_gpu_train_batch_size = None,
+        per_gpu_eval_batch_size = None,
+        gradient_accumulation_steps = 2,
+        eval_accumulation_steps = 2,
+        eval_delay = 0,
+        torch_empty_cache_steps = 250,
+        learning_rate = 5e-05,
+        weight_decay = 0.01,
+        adam_beta1 = 0.9,
+        adam_beta2 = 0.999,
+        adam_epsilon = 1e-08,
+        max_grad_norm = 1.0,
+        num_train_epochs = 3.0,
+        max_steps = -1,
+        lr_scheduler_type = 'linear',
+        warmup_ratio = 0.1,
+        warmup_steps = 0,
+        log_level = 'passive',
+        log_level_replica = 'warning',
+        log_on_each_node = True,
+        logging_dir = None,
+        logging_strategy = 'steps',
+        logging_first_step = False,
+        logging_steps = 1,
+        logging_nan_inf_filter = False,
+        save_strategy = 'steps',
+        save_steps = 500,
+        save_total_limit = None,
+        save_safetensors = True,
+        save_on_each_node = False,
+        save_only_model = False,
+        restore_callback_states_from_checkpoint = False,
+        no_cuda = False,
+        use_cpu = False,
+        use_mps_device = False,
+        seed = 3407,
+        data_seed = 3407,
+        jit_mode_eval = False,
+        use_ipex = False,
+        bf16 = False,
+        fp16 = False,
+        fp16_opt_level = 'O1',
+        half_precision_backend = 'auto',
+        bf16_full_eval = False,
+        fp16_full_eval = False,
+        tf32 = None,
+        local_rank = -1,
+        ddp_backend = None,
+        tpu_num_cores = None,
+        tpu_metrics_debug = False,
+        debug = '',
+        dataloader_drop_last = False,
+        eval_steps = None,
+        dataloader_num_workers = 0,
+        dataloader_prefetch_factor = None,
+        past_index = -1,
+        run_name = None,
+        disable_tqdm = None,
+        remove_unused_columns = True,
+        label_names = None,
+        load_best_model_at_end = False,
+        metric_for_best_model = None,
+        greater_is_better = None,
+        ignore_data_skip = False,
+        fsdp = '',
+        fsdp_min_num_params = 0,
+        fsdp_config = None,
+        fsdp_transformer_layer_cls_to_wrap = None,
+        accelerator_config = None,
+        deepspeed = None,
+        label_smoothing_factor = 0.0,
+        optim = 'adamw_8bit',
+        optim_args = None,
+        adafactor = False,
+        group_by_length = False,
+        length_column_name = 'length',
+        report_to = None,
+        ddp_find_unused_parameters = None,
+        ddp_bucket_cap_mb = None,
+        ddp_broadcast_buffers = None,
+        dataloader_pin_memory = True,
+        dataloader_persistent_workers = False,
+        skip_memory_metrics = True,
+        use_legacy_prediction_loop = False,
+        push_to_hub = False,
+        resume_from_checkpoint = None,
+        hub_model_id = None,
+        hub_strategy = 'every_save',
+        hub_token = None,
+        hub_private_repo = None,
+        hub_always_push = False,
+        hub_revision = None,
+        gradient_checkpointing = False,
+        gradient_checkpointing_kwargs = None,
+        include_inputs_for_metrics = False,
+        eval_do_concat_batches = True,
+        fp16_backend = 'auto',
+        push_to_hub_model_id = None,
+        push_to_hub_organization = None,
+        push_to_hub_token = None,
+        mp_parameters = '',
+        auto_find_batch_size = True,
+        full_determinism = False,
+        torchdynamo = None,
+        ray_scope = 'last',
+        ddp_timeout = 1800,
+        torch_compile = False,
+        torch_compile_backend = None,
+        torch_compile_mode = None,
+        include_tokens_per_second = False,
+        include_num_input_tokens_seen = False,
+        neftune_noise_alpha = None,
+        optim_target_modules = None,
+        batch_eval_metrics = False,
+        eval_on_start = False,
+        use_liger_kernel = False,
+        liger_kernel_config = None,
+        eval_use_gather_object = False,
+        average_tokens_across_devices = True,
+        model_init_kwargs = None,
+        chat_template_path = None,
+        dataset_text_field = 'text',
+        dataset_kwargs = None,
+        dataset_num_proc = None,
+        eos_token = None,
+        pad_token = None,
+        max_length = 1024,
+        packing = False,
+        packing_strategy = 'bfd',
+        padding_free = False,
+        pad_to_multiple_of = None,
+        eval_packing = None,
+        completion_only_loss = None,
+        assistant_only_loss = False,
+        activation_offloading = False,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        max_seq_length = None,
+        **kwargs,
+    ):
+        if learning_rate < 1e-7: raise FloatingPointError(f'Unsloth: Your learning rate of `{learning_rate}` is too small and less than 1e-7! Consider increasing it, otherwise gradient updates will be close to 0!')
+        if learning_rate > 1: raise OverflowError(f'Unsloth: Your learning rate of `{learning_rate}` is way too larger > 1! Consider decreasing it to 1e-1, otherwise gradient updates will explode!')
+        if output_dir is None and save_strategy == 'steps' and save_steps == 500:
+            output_dir = 'unsloth_training_checkpoints'
+            save_strategy = 'no'
+        if dataset_num_proc is None:
+            from multiprocessing import cpu_count
+            dataset_num_proc = min(cpu_count()*2, 2)
+        
+        super().__init__(
+            output_dir = output_dir,
+            overwrite_output_dir = overwrite_output_dir,
+            do_train = do_train,
+            do_eval = do_eval,
+            do_predict = do_predict,
+            eval_strategy = eval_strategy,
+            prediction_loss_only = prediction_loss_only,
+            per_device_train_batch_size = per_device_train_batch_size,
+            per_device_eval_batch_size = per_device_eval_batch_size,
+            per_gpu_train_batch_size = per_gpu_train_batch_size,
+            per_gpu_eval_batch_size = per_gpu_eval_batch_size,
+            gradient_accumulation_steps = gradient_accumulation_steps,
+            eval_accumulation_steps = eval_accumulation_steps,
+            eval_delay = eval_delay,
+            torch_empty_cache_steps = torch_empty_cache_steps,
+            learning_rate = learning_rate,
+            weight_decay = weight_decay,
+            adam_beta1 = adam_beta1,
+            adam_beta2 = adam_beta2,
+            adam_epsilon = adam_epsilon,
+            max_grad_norm = max_grad_norm,
+            num_train_epochs = num_train_epochs,
+            max_steps = max_steps,
+            lr_scheduler_type = lr_scheduler_type,
+            warmup_ratio = warmup_ratio,
+            warmup_steps = warmup_steps,
+            log_level = log_level,
+            log_level_replica = log_level_replica,
+            log_on_each_node = log_on_each_node,
+            logging_dir = logging_dir,
+            logging_strategy = logging_strategy,
+            logging_first_step = logging_first_step,
+            logging_steps = logging_steps,
+            logging_nan_inf_filter = logging_nan_inf_filter,
+            save_strategy = save_strategy,
+            save_steps = save_steps,
+            save_total_limit = save_total_limit,
+            save_safetensors = save_safetensors,
+            save_on_each_node = save_on_each_node,
+            save_only_model = save_only_model,
+            restore_callback_states_from_checkpoint = restore_callback_states_from_checkpoint,
+            no_cuda = no_cuda,
+            use_cpu = use_cpu,
+            use_mps_device = use_mps_device,
+            seed = seed,
+            data_seed = data_seed,
+            jit_mode_eval = jit_mode_eval,
+            use_ipex = use_ipex,
+            bf16 = bf16,
+            fp16 = fp16,
+            fp16_opt_level = fp16_opt_level,
+            half_precision_backend = half_precision_backend,
+            bf16_full_eval = bf16_full_eval,
+            fp16_full_eval = fp16_full_eval,
+            tf32 = tf32,
+            local_rank = local_rank,
+            ddp_backend = ddp_backend,
+            tpu_num_cores = tpu_num_cores,
+            tpu_metrics_debug = tpu_metrics_debug,
+            debug = debug,
+            dataloader_drop_last = dataloader_drop_last,
+            eval_steps = eval_steps,
+            dataloader_num_workers = dataloader_num_workers,
+            dataloader_prefetch_factor = dataloader_prefetch_factor,
+            past_index = past_index,
+            run_name = run_name,
+            disable_tqdm = disable_tqdm,
+            remove_unused_columns = remove_unused_columns,
+            label_names = label_names,
+            load_best_model_at_end = load_best_model_at_end,
+            metric_for_best_model = metric_for_best_model,
+            greater_is_better = greater_is_better,
+            ignore_data_skip = ignore_data_skip,
+            fsdp = fsdp,
+            fsdp_min_num_params = fsdp_min_num_params,
+            fsdp_config = fsdp_config,
+            fsdp_transformer_layer_cls_to_wrap = fsdp_transformer_layer_cls_to_wrap,
+            accelerator_config = accelerator_config,
+            deepspeed = deepspeed,
+            label_smoothing_factor = label_smoothing_factor,
+            optim = optim,
+            optim_args = optim_args,
+            adafactor = adafactor,
+            group_by_length = group_by_length,
+            length_column_name = length_column_name,
+            report_to = report_to,
+            ddp_find_unused_parameters = ddp_find_unused_parameters,
+            ddp_bucket_cap_mb = ddp_bucket_cap_mb,
+            ddp_broadcast_buffers = ddp_broadcast_buffers,
+            dataloader_pin_memory = dataloader_pin_memory,
+            dataloader_persistent_workers = dataloader_persistent_workers,
+            skip_memory_metrics = skip_memory_metrics,
+            use_legacy_prediction_loop = use_legacy_prediction_loop,
+            push_to_hub = push_to_hub,
+            resume_from_checkpoint = resume_from_checkpoint,
+            hub_model_id = hub_model_id,
+            hub_strategy = hub_strategy,
+            hub_token = hub_token,
+            hub_private_repo = hub_private_repo,
+            hub_always_push = hub_always_push,
+            hub_revision = hub_revision,
+            gradient_checkpointing = gradient_checkpointing,
+            gradient_checkpointing_kwargs = gradient_checkpointing_kwargs,
+            include_inputs_for_metrics = include_inputs_for_metrics,
+            eval_do_concat_batches = eval_do_concat_batches,
+            fp16_backend = fp16_backend,
+            push_to_hub_model_id = push_to_hub_model_id,
+            push_to_hub_organization = push_to_hub_organization,
+            push_to_hub_token = push_to_hub_token,
+            mp_parameters = mp_parameters,
+            auto_find_batch_size = auto_find_batch_size,
+            full_determinism = full_determinism,
+            torchdynamo = torchdynamo,
+            ray_scope = ray_scope,
+            ddp_timeout = ddp_timeout,
+            torch_compile = torch_compile,
+            torch_compile_backend = torch_compile_backend,
+            torch_compile_mode = torch_compile_mode,
+            include_tokens_per_second = include_tokens_per_second,
+            include_num_input_tokens_seen = include_num_input_tokens_seen,
+            neftune_noise_alpha = neftune_noise_alpha,
+            optim_target_modules = optim_target_modules,
+            batch_eval_metrics = batch_eval_metrics,
+            eval_on_start = eval_on_start,
+            use_liger_kernel = use_liger_kernel,
+            liger_kernel_config = liger_kernel_config,
+            eval_use_gather_object = eval_use_gather_object,
+            average_tokens_across_devices = average_tokens_across_devices,
+            model_init_kwargs = model_init_kwargs,
+            chat_template_path = chat_template_path,
+            dataset_text_field = dataset_text_field,
+            dataset_kwargs = dataset_kwargs,
+            dataset_num_proc = dataset_num_proc,
+            eos_token = eos_token,
+            pad_token = pad_token,
+            max_length = max_length,
+            packing = packing,
+            packing_strategy = packing_strategy,
+            padding_free = padding_free,
+            pad_to_multiple_of = pad_to_multiple_of,
+            eval_packing = eval_packing,
+            completion_only_loss = completion_only_loss,
+            assistant_only_loss = assistant_only_loss,
+            activation_offloading = activation_offloading,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        self.max_seq_length = max_seq_length
+pass
+
+class _UnslothSFTTrainer(Trainer):
+    """"""
+
+    _tag_names = ["trl", "sft"]
+
+    def __init__(
+        self,
+        model: Union[str, nn.Module, PreTrainedModel],
+        args: Optional[Union[SFTConfig, TrainingArguments]] = None,
+        data_collator: Optional[DataCollator] = None,  # type: ignore
+        train_dataset: Optional[Union[Dataset, IterableDataset]] = None,
+        eval_dataset: Optional[Union[Dataset, dict[str, Dataset]]] = None,
+        processing_class: Optional[
+            Union[PreTrainedTokenizerBase, BaseImageProcessor, FeatureExtractionMixin, ProcessorMixin]
+        ] = None,
+        compute_loss_func: Optional[Callable] = None,
+        compute_metrics: Optional[Callable[[EvalPrediction], dict]] = None,
+        callbacks: Optional[list[TrainerCallback]] = None,
+        optimizers: tuple[Optional[torch.optim.Optimizer], Optional[torch.optim.lr_scheduler.LambdaLR]] = (None, None),
+        optimizer_cls_and_kwargs: Optional[tuple[type[torch.optim.Optimizer], dict[str, Any]]] = None,
+        preprocess_logits_for_metrics: Optional[Callable[[torch.Tensor, torch.Tensor], torch.Tensor]] = None,
+        peft_config: Optional["PeftConfig"] = None,
+        formatting_func: Optional[Callable[[dict], str]] = None,
+    ):
+        # Args
+        model_id = model if isinstance(model, str) else model.config._name_or_path
+        if args is None:
+            model_name = model_id.split("/")[-1]
+            args = SFTConfig(f"{model_name}-SFT")
+        elif isinstance(args, TrainingArguments) and not isinstance(args, SFTConfig):
+            dict_args = args.to_dict()
+            dict_args["hub_token"] = args.hub_token  # to_dict hides the hub_token
+            dict_args.pop("push_to_hub_token")
+            args = SFTConfig(**dict_args)
+
+        # Handle the tokenizer
+        if processing_class is None:
+            processing_class = AutoTokenizer.from_pretrained(model_id)
+
+        if args.eos_token is not None:
+            eos_token = args.eos_token
+            eos_token_id = processing_class.convert_tokens_to_ids(eos_token)
+            if eos_token_id is None:
+                raise ValueError(
+                    f"The specified `eos_token` ('{eos_token}') is not found in the vocabulary of the given "
+                    f"`processing_class` ({processing_class.__class__.__name__}). Ensure that the `eos_token` exists "
+                    "in the vocabulary before using it as an EOS token."
+                )
+            processing_class.eos_token_id = eos_token_id
+
+        # Model
+        if args.model_init_kwargs is not None and not isinstance(model, str):
+            warnings.warn(
+                "You passed model_init_kwargs to the `SFTConfig`, but your model is already instantiated. "
+                "The `model_init_kwargs` will be ignored."
+            )
+        if isinstance(model, str):
+            model = self._create_model_from_path(model, args)
+
+        if args.chat_template_path is not None:
+            if os.path.isfile(args.chat_template_path) and args.chat_template_path.endswith((".jinja", ".j2")):
+                with open(args.chat_template_path, encoding="utf-8") as chat_template_file:
+                    processing_class.chat_template = chat_template_file.read()
+                added_tokens = []
+            else:
+                model, processing_class, added_tokens = clone_chat_template(
+                    model, processing_class, args.chat_template_path
+                )
+        else:
+            added_tokens = []
+
+        # PEFT configuration and model wrapping
+        if False:
+            if added_tokens:
+                # Ensure that the added tokens are trainable
+                if peft_config.trainable_token_indices is None:
+                    peft_config.trainable_token_indices = {"embed_tokens": added_tokens}
+                elif "embed_tokens" not in peft_config.trainable_token_indices:
+                    peft_config.trainable_token_indices["embed_tokens"] = added_tokens
+                else:
+                    peft_config.trainable_token_indices["embed_tokens"].extend(added_tokens)
+
+                # Ensure that the lm_head is trainable
+                if peft_config.modules_to_save is None or "lm_head" not in peft_config.modules_to_save:
+                    warnings.warn(
+                        "Cloning chat template added new tokens to the tokenizer, but 'lm_head' is not in PEFT's "
+                        "`modules_to_save`. As a result, the model may not learn to generate outputs with these new "
+                        "tokens, leading to degraded generation quality. To fix this, add "
+                        "`modules_to_save=['lm_head']` to your PEFT configuration."
+                    )
+
+                    if peft_config.modules_to_save is None:
+                        peft_config.modules_to_save = ["lm_head"]
+                    else:
+                        peft_config.modules_to_save.append("lm_head")
+
+        if False:
+            pass
+
+        # Data collator
+        # BFD packing requires padding-free mode; otherwise, the collator outputs padded attention masks, causing
+        # FlashAttention to ignore position_ids and recompute them incorrectly from the padded attention mask.
+        self.padding_free = args.padding_free or (args.packing and args.packing_strategy == "bfd")
+        use_flash_attention = model.config._attn_implementation in [
+            "flash_attention_2",
+            "kernels-community/vllm-flash-attn3",
+        ]
+        if self.padding_free:
+            if data_collator is not None:
+                raise ValueError("Passing a custom data collator is not supported when using padding-free.")
+            if args.packing and args.packing_strategy == "wrapped":
+                warnings.warn(
+                    "You are passing `padding_free=True` with the 'wrapped' packing strategy, which is not "
+                    "recommended. Please refer to the documentation to understand why this is not recommended."
+                )
+            if not use_flash_attention:
+                warnings.warn(
+                    "Padding-free training is enabled, but the attention implementation is not set to "
+                    "'flash_attention_2'. Padding-free training flattens batches into a single sequence, and "
+                    "'flash_attention_2' is the only known attention mechanism that reliably supports this. Using "
+                    "other implementations may lead to unexpected behavior. To ensure compatibility, set "
+                    "`attn_implementation='flash_attention_2'` in the model configuration, or verify that your "
+                    "attention mechanism can handle flattened sequences."
+                )
+            if args.per_device_train_batch_size == 1 and not args.packing:
+                warnings.warn(
+                    "You are using a per_device_train_batch_size of 1 with padding-free training. Using a batch size "
+                    "of 1 anihilate the benefits of padding-free training. Please consider increasing the batch size "
+                    "to at least 2."
+                )
+
+        dataset_sample = next(iter(train_dataset))
+        if args.completion_only_loss is None:
+            self.completion_only_loss = "prompt" in dataset_sample
+        else:
+            self.completion_only_loss = args.completion_only_loss
+
+        if data_collator is None:
+            # Get the pad token: if not provided, use the one from the processing class or the eos token
+            # if the processing class does not have a pad token.
+            pad_token = args.pad_token or processing_class.pad_token or processing_class.eos_token
+            pad_token_id = processing_class.convert_tokens_to_ids(pad_token)
+            if pad_token_id is None:
+                raise ValueError(
+                    f"The specified `pad_token` ('{pad_token}') is not found in the vocabulary of the given "
+                    f"`processing_class` ({processing_class.__class__.__name__}). Ensure that the `pad_token` exists "
+                    "in the vocabulary before using it as a padding token."
+                )
+            data_collator = DataCollatorForLanguageModeling(
+                pad_token_id=pad_token_id,
+                completion_only_loss=self.completion_only_loss,
+                padding_free=self.padding_free,
+                # Using position_ids without flash_attn hurts the training
+                return_position_ids=use_flash_attention,
+                pad_to_multiple_of=args.pad_to_multiple_of,
+            )
+
+        if args.packing and args.packing_strategy == "bfd" and not use_flash_attention:
+            warnings.warn(
+                "You are using packing, but the attention implementation is not set to 'flash_attention_2' or "
+                "'kernels-community/vllm-flash-attn3'. Packing flattens batches into a single sequence, and Flash "
+                "Attention is the only known attention mechanisms that reliably support this. Using other "
+                "implementations may lead to cross-contamination between batches. To avoid this, either disable "
+                "packing by setting `packing=False`, or set `attn_implementation='flash_attention_2'` or "
+                "`attn_implementation='kernels-community/vllm-flash-attn3'` in the model configuration."
+            )
+        if args.assistant_only_loss and not is_conversational(dataset_sample):
+            raise ValueError(
+                "You set `assistant_only_loss=True`, but the dataset is not conversational. This option is only "
+                "supported for conversational datasets."
+            )
+
+        # Dataset
+        preprocess_dataset = args.dataset_kwargs is None or not args.dataset_kwargs.get("skip_prepare_dataset", False)
+        if preprocess_dataset:
+            if self.completion_only_loss and formatting_func:
+                raise ValueError(
+                    "A formatting function was provided while `completion_only_loss=True`, which is incompatible. "
+                    "Using a formatter converts the dataset to a language modeling type, conflicting with "
+                    "completion-only loss. To resolve this, apply your formatting function before passing the "
+                    "dataset, or disable `completion_only_loss` in `SFTConfig`."
+                )
+            train_dataset = self._prepare_dataset(
+                train_dataset, processing_class, args, args.packing, formatting_func, "train"
+            )
+            if eval_dataset is not None:
+                packing = args.packing if args.eval_packing is None else args.eval_packing
+                if isinstance(eval_dataset, dict):
+                    eval_dataset = {
+                        key: self._prepare_dataset(dataset, processing_class, args, packing, formatting_func, key)
+                        for key, dataset in eval_dataset.items()
+                    }
+                else:
+                    eval_dataset = self._prepare_dataset(
+                        eval_dataset, processing_class, args, packing, formatting_func, "eval"
+                    )
+
+        # Initialize the metrics
+        self._metrics = {"train": defaultdict(list), "eval": defaultdict(list)}
+        self._total_train_tokens = 0
+
+        # Initialize the Trainer. Parent class will handle:
+        # - DeepSpeed configuration [through create_accelerator_and_postprocess]
+        # - FSDP setup
+        # - Distributed training setup
+        # - Optimizer and scheduler creation
+
+        super().__init__(
+            model=model,
+            args=args,
+            data_collator=data_collator,
+            train_dataset=train_dataset,
+            eval_dataset=eval_dataset,
+            processing_class=processing_class,
+            compute_loss_func=compute_loss_func,
+            compute_metrics=compute_metrics,
+            callbacks=callbacks,
+            optimizers=optimizers,
+            optimizer_cls_and_kwargs=optimizer_cls_and_kwargs,
+            preprocess_logits_for_metrics=preprocess_logits_for_metrics,
+        )
+
+        # Initialize activation offloading context
+        if self.args.activation_offloading:
+            self.maybe_activation_offload_context = get_act_offloading_ctx_manager(model=self.model)
+        else:
+            self.maybe_activation_offload_context = contextlib.nullcontext()
+
+        # Add tags for models that have been loaded with the correct transformers version
+        if hasattr(self.model, "add_model_tags"):
+            self.model.add_model_tags(self._tag_names)
+
+    def _create_model_from_path(self, model_path: str, args: SFTConfig) -> PreTrainedModel:
+        """Creates a model from a path or model identifier."""
+        model_init_kwargs = args.model_init_kwargs or {}
+        # Handle torch dtype
+        torch_dtype = model_init_kwargs.get("torch_dtype")
+        if isinstance(torch_dtype, torch.dtype) or torch_dtype == "auto" or torch_dtype is None:
+            pass  # torch_dtype is already a torch.dtype or "auto" or None
+        elif isinstance(torch_dtype, str):  # it's a str, but not "auto"
+            torch_dtype = getattr(torch, torch_dtype)
+            model_init_kwargs["torch_dtype"] = torch_dtype
+        else:
+            raise ValueError(
+                "Invalid `torch_dtype` passed to `SFTConfig`. Expected either 'auto' or a string representing "
+                f"a `torch.dtype` (e.g., 'float32'), but got {torch_dtype}."
+            )
+        # Disable caching if gradient checkpointing is enabled (not supported)
+        # if args.gradient_checkpointing:
+        #     model_init_kwargs["use_cache"] = False
+
+        # Create model
+        model = AutoModelForCausalLM.from_pretrained(model_path, **model_init_kwargs)
+        return model
+
+    def _prepare_peft_model(self, model: PreTrainedModel, peft_config: Any, args: SFTConfig) -> PreTrainedModel:
+        """Prepares a model for PEFT training."""
+        if not is_peft_available():
+            raise ImportError("To use PeftModel, you need to install the `peft` library.")
+
+        # Handle quantized models (QLoRA)
+        is_qlora = getattr(model, "is_loaded_in_4bit", False) or getattr(model, "is_loaded_in_8bit", False)
+
+        is_sharded_qlora = False
+        if getattr(model, "is_loaded_in_4bit", False):
+            # Check if model is sharded (FSDP/DS-Zero3)
+            for _, param in model.named_parameters():
+                if param.__class__.__name__ == "Params4bit":
+                    is_sharded_qlora = param.data.device.type in {"cpu", "meta"}
+                    break
+
+        # Prepare model for kbit training if needed
+        if is_qlora and not is_sharded_qlora:
+            model = self._prepare_model_for_kbit_training(model, args)
+            # Disable gradient checkpointing as it's handled by prepare_model_for_kbit_training
+            args = dataclasses.replace(args, gradient_checkpointing=False)
+        elif args.gradient_checkpointing:
+            model = self._enable_gradient_checkpointing(model, args)
+
+        # Create PEFT model
+        if peft_config is not None:
+            if (
+                version.parse(peft.__version__) >= version.parse("0.12")  # autocast_adapter_dtype introduced in 0.12
+                and getattr(model, "is_loaded_in_4bit", False)
+                and is_sharded_qlora
+            ):
+                model = get_peft_model(model, peft_config, autocast_adapter_dtype=False)
+            else:
+                model = get_peft_model(model, peft_config)
+
+        # Handle bf16 casting for 4-bit models
+        if args.bf16 and getattr(model, "is_loaded_in_4bit", False) and not is_sharded_qlora:
+            peft_module_casting_to_bf16(model)
+
+        return model
+
+    def _prepare_model_for_kbit_training(self, model: PreTrainedModel, args: SFTConfig) -> PreTrainedModel:
+        """Prepares a quantized model for kbit training."""
+        prepare_model_kwargs = {
+            "use_gradient_checkpointing": args.gradient_checkpointing,
+            "gradient_checkpointing_kwargs": args.gradient_checkpointing_kwargs or {},
+        }
+
+        return prepare_model_for_kbit_training(model, **prepare_model_kwargs)
+
+    def _enable_gradient_checkpointing(self, model: PreTrainedModel, args: SFTConfig) -> PreTrainedModel:
+        """Enables gradient checkpointing for the model."""
+        gradient_checkpointing_kwargs = args.gradient_checkpointing_kwargs or {}
+        use_reentrant = (
+            "use_reentrant" not in gradient_checkpointing_kwargs or gradient_checkpointing_kwargs["use_reentrant"]
+        )
+
+        if use_reentrant:
+            if hasattr(model, "enable_input_require_grads"):
+                model.enable_input_require_grads()
+            else:
+
+                def make_inputs_require_grad(module, input, output):
+                    output.requires_grad_(True)
+
+                model.get_input_embeddings().register_forward_hook(make_inputs_require_grad)
+
+        return model
+
+    def _prepare_dataset(
+        self,
+        dataset: Union[Dataset, IterableDataset],
+        processing_class,
+        args,
+        packing: bool,
+        formatting_func: Optional[Callable[[dict], str]],
+        dataset_name: str,
+    ) -> Union[Dataset, IterableDataset]:
+        # All Unsloth Zoo code licensed under LGPLv3
+        try:
+            if isinstance(dataset, ConstantLengthDataset): return dataset
+        except:
+            pass
+    
+        map_kwargs = {}
+        use_desc = isinstance(dataset, Dataset)
+        is_vlm = hasattr(processing_class, "tokenizer")
+        tokenizer = processing_class
+        if is_vlm: tokenizer = processing_class.tokenizer
+    
+        # Get max length
+        max_seq_length = getattr(args, "max_length", 0)
+        if max_seq_length == 0: max_seq_length = getattr(args, "max_seq_length", 0)
+        if max_seq_length == 0: max_seq_length = getattr(self, "max_seq_length", 0)
+        if max_seq_length == 0: max_seq_length = getattr(self, "max_seq", 0)
+        if max_seq_length == 0: raise RuntimeError("Unsloth: max_seq_length is 0! Please specify one!")
+        dataset_text_field = getattr(args, "dataset_text_field", "text")
+        do_truncation = max_seq_length != 0
+        do_formatting_func = False
+        do_tokenize = True
+    
+        # Get correct column names
+        column_names = set(next(iter(dataset)).keys())
+        used_column_names = ["input_ids"]
+        if "attention_mask" in column_names:
+            used_column_names.append("attention_mask")
+    
+        # Check if already tokenized so skip
+        from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling
+        if "labels" in column_names:
+            # Most likely forgot data collator!
+            if is_vlm and not hasattr(tokenizer, "pad"):
+                # Check if processing_class has a .pad, if not, use tokenizer.tokenizer
+                raise RuntimeError(f"Unsloth: {processing_class.__class__} does not have .pad!")
+            self.data_collator = DataCollatorForSeq2Seq(tokenizer)
+            used_column_names.append("labels")
+            do_tokenize = False
+        elif "input_ids" in column_names:
+            # Skip dataset prep, and set data collator
+            if is_vlm and not hasattr(tokenizer, "pad"):
+                # Check if processing_class has a .pad, if not, use tokenizer.tokenizer
+                raise RuntimeError(f"Unsloth: {processing_class.__class__} does not have .pad!")
+            self.data_collator = DataCollatorForLanguageModeling(tokenizer, mlm = False)
+            do_tokenize = False
+        elif dataset_text_field not in column_names:
+            do_formatting_func = True
+            if formatting_func is None:
+                raise RuntimeError("Unsloth: You must specify a `formatting_func`")
+        pass
+    
+        if do_tokenize:
+            # Check double BOS tokens
+            if do_formatting_func:
+                test_text = formatting_func(next(iter(dataset)))
+                if not isinstance(test_text, list):
+                    raise ValueError(
+                        "Unsloth: The `formatting_func` should return a list of processed strings."
+                    )
+                test_text = test_text[0]
+            else:
+                test_text = next(iter(dataset))[dataset_text_field][0]
+    
+            # Get chat template
+            chat_template = getattr(processing_class, 'chat_template', '')
+            if chat_template == '' and is_vlm:
+                chat_template = getattr(tokenizer, 'chat_template', '')
+            if chat_template is None:
+                chat_template = ''
+    
+            # Get bos_token
+            add_special_tokens = True
+            bos_token_1 = getattr(processing_class, 'bos_token', None)
+            bos_token_2 = getattr(tokenizer, 'bos_token', None)
+            bos_token = bos_token_1 or bos_token_2
+    
+            if bos_token is not None:
+                if test_text.startswith(bos_token) or bos_token in chat_template:
+                    add_special_tokens = False
+                    print("Unsloth: We found double BOS tokens - we shall remove one automatically.")
+            pass
+    
+            # Create tokenize function
+            def _tokenize(example):
+                return tokenizer(
+                    example[dataset_text_field] if not do_formatting_func else formatting_func(example),
+                    truncation = do_truncation,
+                    max_length = max_seq_length,
+                    return_token_type_ids = False,
+                    add_special_tokens = add_special_tokens,
+                )
+            pass
+    
+            if not isinstance(dataset, IterableDataset):
+                map_kwargs["num_proc"] = getattr(args, "dataset_num_proc", 2)
+            else:
+                map_kwargs["batch_size"] = dataset._ex_iterable.batch_size
+                
+            if use_desc: map_kwargs["desc"] = f'Unsloth: Tokenizing ["{dataset_text_field}"]'
+            dataset = dataset.map(_tokenize, batched = True, **map_kwargs)
+    
+            # If VLM, switch data collator since .pad is needed!
+            if is_vlm and not hasattr(processing_class, "pad"):
+                data_collator = DataCollatorForLanguageModeling(tokenizer, mlm = False)
+                self.data_collator = data_collator
+            pass
+        pass
+        if packing:
+            # Try using new packing which works in TRL
+            try:
+                pack_dataset
+            except:
+                print("Unsloth: Hugging Face's packing is currently buggy - we're disabling it for now!")
+                return dataset
+    
+            if max_seq_length == 0:
+                raise ValueError("When packing is enabled, `max_seq_length` can't be `None`.")
+    
+            if use_desc: map_kwargs["desc"] = f"Unsloth: Packing {dataset_name} dataset"
+            dataset = pack_dataset(
+                dataset.select_columns(used_column_names),
+                max_seq_length,
+                getattr(args, "packing_strategy", "bfd"),
+                map_kwargs,
+            )
+        pass
+        return dataset
+    
+    def _set_signature_columns_if_needed(self):
+        # If `self.args.remove_unused_columns` is True, non-signature columns are removed.
+        # By default, this method sets `self._signature_columns` to the model's expected inputs (usually, "input_ids"
+        # and "attention_mask"). When using `train_on_completion_only` we add a "completion_mask" column to the
+        # dataset. So we need to override the default signature columns to include "completion_mask" as well.
+        if self._signature_columns is None:
+            self._signature_columns = [
+                "input_ids",
+                "labels",
+                "seq_lengths",
+                "completion_mask",
+                "assistant_masks",
+            ]
+
+    def compute_loss(self, model, inputs, return_outputs = False, num_items_in_batch = None):
+        outputs = super().compute_loss(
+            model,
+            inputs,
+            return_outputs = return_outputs,
+            num_items_in_batch = num_items_in_batch,
+        )
+        return outputs
+
+    # Override training step to add activation offloading context.
+    def training_step(self, *args, **kwargs):
+        with self.maybe_activation_offload_context:
+            return super().training_step(*args, **kwargs)
+
+    def log(self, logs: dict[str, float], start_time: Optional[float] = None) -> None:
+        mode = "train" if self.model.training else "eval"
+        metrics = {key: sum(val) / len(val) for key, val in self._metrics[mode].items()}  # average the metrics
+
+        # This method can be called both in training and evaluation. When called in evaluation, the keys in `logs`
+        # start with "eval_". We need to add the prefix "eval_" to the keys in `metrics` to match the format.
+        if mode == "eval":
+            metrics = {f"eval_{key}": val for key, val in metrics.items()}
+
+        logs = {**logs, **metrics}
+        super().log(logs, start_time)
+        self._metrics[mode].clear()
+
+    # Ensure the model card is saved along with the checkpoint
+    def _save_checkpoint(self, model, trial):
+        if self.args.hub_model_id is None:
+            model_name = Path(self.args.output_dir).name
+        else:
+            model_name = self.args.hub_model_id.split("/")[-1]
+        self.create_model_card(model_name=model_name)
+        super()._save_checkpoint(model, trial)
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=list(tags),
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="SFT",
+        )
+
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothSFTTrainer(_UnslothSFTTrainer):
+    """
+    
+    Trainer for Supervised Fine-Tuning (SFT) method.
+
+    This class is a wrapper around the [`transformers.Trainer`] class and inherits all of its attributes and methods.
+
+    Example:
+
+    ```python
+    from datasets import load_dataset
+    from trl import SFTTrainer
+
+    dataset = load_dataset("roneneldan/TinyStories", split="train[:1%]")
+
+    trainer = SFTTrainer(model="Qwen/Qwen2-0.5B-Instruct", train_dataset=dataset)
+    trainer.train()
+    ```
+
+    Args:
+        model (`Union[str, PreTrainedModel]`):
+            Model to be trained. Can be either:
+
+            - A string, being the *model id* of a pretrained model hosted inside a model repo on huggingface.co, or a
+              path to a *directory* containing model weights saved using
+              [`~transformers.PreTrainedModel.save_pretrained`], e.g., `'./my_model_directory/'`. The model is loaded
+              using [`~transformers.AutoModelForCausalLM.from_pretrained`] with the keyword arguments in
+              `args.model_init_kwargs`.
+            - A [`~transformers.PreTrainedModel`] object. Only causal language models are supported.
+        args ([`SFTConfig`], *optional*, defaults to `None`):
+            Configuration for this trainer. If `None`, a default configuration is used.
+        data_collator (`DataCollator`, *optional*):
+            Function to use to form a batch from a list of elements of the processed `train_dataset` or `eval_dataset`.
+            Will default to a custom [`DataCollatorForLanguageModeling`].
+        train_dataset ([`~datasets.Dataset`] or [`~datasets.IterableDataset`]):
+            Dataset to use for training. SFT supports both [language modeling](#language-modeling) type and
+            [prompt-completion](#prompt-completion) type. The format of the samples can be either:
+
+            - [Standard](dataset_formats#standard): Each sample contains plain text.
+            - [Conversational](dataset_formats#conversational): Each sample contains structured messages (e.g., role
+              and content).
+
+            The trainer also supports processed datasets (tokenized) as long as they contain an `input_ids` field.
+        eval_dataset ([`~datasets.Dataset`], [`~datasets.IterableDataset`] or `dict[str, Union[Dataset, IterableDataset]]`):
+            Dataset to use for evaluation. It must meet the same requirements as `train_dataset`.
+        processing_class ([`~transformers.PreTrainedTokenizerBase`], [`~transformers.BaseImageProcessor`], [`~transformers.FeatureExtractionMixin`] or [`~transformers.ProcessorMixin`], *optional*, defaults to `None`):
+            Processing class used to process the data. If `None`, the processing class is loaded from the model's name
+            with [`~transformers.AutoTokenizer.from_pretrained`].
+        callbacks (list of [`~transformers.TrainerCallback`], *optional*, defaults to `None`):
+            List of callbacks to customize the training loop. Will add those to the list of default callbacks detailed
+            in [here](https://huggingface.co/docs/transformers/main_classes/callback).
+
+            If you want to remove one of the default callbacks used, use the [`~transformers.Trainer.remove_callback`]
+            method.
+        optimizers (`tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR]`, *optional*, defaults to `(None, None)`):
+            A tuple containing the optimizer and the scheduler to use. Will default to an instance of [`AdamW`] on your
+            model and a scheduler given by [`get_linear_schedule_with_warmup`] controlled by `args`.
+        optimizer_cls_and_kwargs (`Tuple[Type[torch.optim.Optimizer], Dict[str, Any]]`, *optional*, defaults to `None`):
+            A tuple containing the optimizer class and keyword arguments to use. Overrides `optim` and `optim_args` in
+            `args`. Incompatible with the `optimizers` argument.
+
+            Unlike `optimizers`, this argument avoids the need to place model parameters on the correct devices before
+            initializing the Trainer.
+        preprocess_logits_for_metrics (`Callable[[torch.Tensor, torch.Tensor], torch.Tensor]`, *optional*, defaults to `None`):
+            A function that preprocess the logits right before caching them at each evaluation step. Must take two
+            tensors, the logits and the labels, and return the logits once processed as desired. The modifications made
+            by this function will be reflected in the predictions received by `compute_metrics`.
+
+            Note that the labels (second parameter) will be `None` if the dataset does not have them.
+        peft_config ([`~peft.PeftConfig`], *optional*, defaults to `None`):
+            PEFT configuration used to wrap the model. If `None`, the model is not wrapped.
+        formatting_func (`Optional[Callable]`):
+            Formatting function applied to the dataset before tokenization. Applying the formatting function explicitly
+            converts the dataset into a [language modeling](#language-modeling) type.
+    
+    """
+    def __init__(
+        self,
+        model,
+        args = None,
+        data_collator = None,
+        train_dataset = None,
+        eval_dataset = None,
+        processing_class = None,
+        compute_loss_func = None,
+        compute_metrics = None,
+        callbacks = None,
+        optimizer_cls_and_kwargs = None,
+        preprocess_logits_for_metrics = None,
+        peft_config = None,
+        formatting_func = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothSFTConfig()
+        use_bf16 = getattr(args, 'bf16', False)
+        if type(use_bf16) is not bool: use_bf16 = False
+        use_fp16 = getattr(args, 'fp16', False)
+        if type(use_fp16) is not bool: use_fp16 = False
+        force_float32 = False
+        if os.environ.get('UNSLOTH_FORCE_FLOAT32', '0') == '1':
+            print('Unsloth: Switching to float32 training since model cannot work with float16')
+            force_float32 = True
+        mixed_precision_dtype = os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32')
+        dtype = getattr(model.config, 'torch_dtype', None)
+        if dtype is None: dtype = model.get_input_embeddings().dtype
+        from unsloth_zoo.utils import _get_dtype
+        dtype = _get_dtype(dtype)
+        float16 = dtype == torch.float16
+        if not force_float32 and (float16 and use_bf16): raise TypeError('Unsloth: Model is in float16 precision but you want to use bfloat16 precision. Set fp16 to `True` and bf16 to `False`')
+        if not force_float32 and (not float16 and use_fp16): raise TypeError('Unsloth: Model is in bfloat16 precision but you want to use float16 precision. Set fp16 to `False` and bf16 to `True`')
+        if force_float32:
+            args.fp16 = False
+            args.bf16 = False
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'no'
+        elif (not use_bf16 and not use_fp16) and mixed_precision_dtype == 'float32':
+            args.fp16 = float16
+            args.bf16 = not float16
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'fp16' if float16 else 'bf16'
+        if getattr(args, 'eval_dataset', None) is not None and getattr(args, 'eval_strategy', 'no') == 'no':
+            args.eval_strategy = 'steps'
+            if getattr(args, 'eval_steps', None) is None: args.eval_steps = 0.1
+        ga_steps = getattr(args, 'gradient_accumulation_steps', None)
+        if ga_steps is not None and ga_steps > 1:
+            from transformers import __version__ as transformers_version
+            if Version(transformers_version) <= Version('4.45.2'):
+                print('**** Unsloth: Please use our fixed gradient_accumulation_steps by updating transformers, TRL and Unsloth!\n'
+                      '`pip install --upgrade --no-cache-dir --force-reinstall --no-deps unsloth transformers trl unsloth_zoo`')
+        if getattr(args, 'eval_strategy', 'no') != 'no':
+            eval_bsz = getattr(args, 'per_device_eval_batch_size', 8)
+            if eval_bsz == 8 and args.per_device_train_batch_size < eval_bsz: args.per_device_eval_batch_size = args.per_device_train_batch_size
+            if getattr(args, 'eval_accumulation_steps', None) is None and ga_steps is not None: args.eval_accumulation_steps = ga_steps
+        fp16_full_eval = getattr(args, 'fp16_full_eval', False)
+        if type(fp16_full_eval) is not bool: fp16_full_eval = False
+        bf16_full_eval = getattr(args, 'bf16_full_eval', False)
+        if type(bf16_full_eval) is not bool: bf16_full_eval = False
+        if args.fp16 and bf16_full_eval: args.bf16_full_eval = False; args.fp16_full_eval = True
+        if args.bf16 and fp16_full_eval: args.bf16_full_eval = True; args.fp16_full_eval = False
+        if force_float32:
+            args.bf16_full_eval = False
+            args.fp16_full_eval = False
+        elif os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32') == 'bfloat16':
+            args.bf16_full_eval = True
+            args.fp16_full_eval = False
+        elif not bf16_full_eval and not fp16_full_eval:
+            args.bf16_full_eval = args.bf16
+            args.fp16_full_eval = args.fp16
+        _output_logits = False
+        if locals().get('compute_metrics', None) is not None: _output_logits = True
+        if locals().get('preprocess_logits_for_metrics', None) is not None: _output_logits = True
+        if _output_logits:
+            os.environ['UNSLOTH_RETURN_LOGITS'] = '1'
+        if 'max_seq_length' not in locals() and not hasattr(args, 'max_seq_length'):
+            pass
+        else:
+            model_max_seq_length = getattr(model, 'max_seq_length', None)
+            args_max_seq_length  = getattr(args,  'max_seq_length', None)
+            if args_max_seq_length is None and model_max_seq_length is not None:
+                max_seq_length = model.max_seq_length
+                if hasattr(args, 'max_seq_length'): args.max_seq_length = max_seq_length
+        if 'max_length' not in locals() and not hasattr(args, 'max_length'):
+            pass
+        else:
+            if hasattr(args, 'max_seq_length') and args.max_seq_length is not None and args.max_seq_length > 0:
+                if hasattr(args, 'max_length'):
+                    args.max_length = args.max_seq_length
+                    max_length = args.max_length
+            else:
+                model_max_length = getattr(model, 'max_seq_length', None)
+                if model_max_length is None: model_max_length = getattr(model, 'max_length', None)
+                if model_max_length is not None:
+                    args.max_length = model_max_length
+                    max_length = args.max_length
+                elif hasattr(args, 'max_length') and args.max_length is not None:
+                    max_length = args.max_length
+                    # if we are here, then we are in a weird case where max_length is set but max_seq_length is not set
+                    setattr(model, 'max_seq_length', max_length)
+                else:
+                    print('Unsloth: We did not find `max_seq_length` or `max_length` in the model or args. We will set it to 1024.')
+                    args.max_length = 1024
+        if model is not None and hasattr(model, 'for_training'):
+            model.for_training()
+        if 'tokenizer' in locals() and hasattr(tokenizer, 'padding_side'): tokenizer.padding_side = 'right'
+        if 'processing_class' in locals():
+            if hasattr(processing_class, 'padding_side'): processing_class.padding_side = 'right'
+            if hasattr(processing_class, 'tokenizer') and hasattr(processing_class.tokenizer, 'padding_side'): processing_class.tokenizer.padding_side = 'right'
+        __tokenizer = processing_class if 'processing_class' in locals() else tokenizer
+        from unsloth_zoo.vision_utils import UnslothVisionDataCollator
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if isinstance(data_collator, DataCollatorForSeq2Seq) and 'labels' not in train_dataset.column_names:
+                data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False, mlm_probability = 0.0)
+            elif isinstance(data_collator, TransformersDataCollatorForLanguageModeling) and 'labels' in train_dataset.column_names:
+                data_collator = DataCollatorForSeq2Seq(__tokenizer)
+        else:
+            if hasattr(args, 'remove_unused_columns'): args.remove_unused_columns = False
+            if hasattr(args, 'dataset_text_field'): args.dataset_text_field = ''
+            if hasattr(args, 'dataset_kwargs'): args.dataset_kwargs = {'skip_prepare_dataset': True}
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if not hasattr(__tokenizer, 'pad') and hasattr(__tokenizer, 'tokenizer'):
+                if isinstance(data_collator, DataCollatorForSeq2Seq):
+                    data_collator = DataCollatorForSeq2Seq(__tokenizer.tokenizer)
+                else:
+                    data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False, mlm_probability = 0.0)
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('sft_trainer', other_metrics)
+        IGNORED_TOKENIZER_NAMES = os.environ.get('UNSLOTH_IGNORED_TOKENIZER_NAMES', '').split('\n')
+        from unsloth_zoo.tokenizer_utils import fix_untrained_tokens
+        from unsloth_zoo.training_utils  import fix_zero_training_loss
+        if 'tokenizer' not in locals(): tokenizer = processing_class
+        fix_untrained_tokens(model, tokenizer, train_dataset, IGNORED_TOKENIZER_NAMES, eps = 1e-16)
+        fix_zero_training_loss(model, tokenizer, train_dataset)
+        
+        super().__init__(
+            model = model,
+            args = args,
+            data_collator = data_collator,
+            train_dataset = train_dataset,
+            eval_dataset = eval_dataset,
+            processing_class = processing_class,
+            compute_loss_func = compute_loss_func,
+            compute_metrics = compute_metrics,
+            callbacks = callbacks,
+            optimizer_cls_and_kwargs = optimizer_cls_and_kwargs,
+            preprocess_logits_for_metrics = preprocess_logits_for_metrics,
+            peft_config = peft_config,
+            formatting_func = formatting_func,**kwargs)
+        if hasattr(self, 'neftune_hook_handle'):
+            self.neftune_hook_handle.remove()
+            if hasattr(self, 'neftune_hook_handle'): del self.neftune_hook_handle
+        if getattr(args, 'neftune_noise_alpha', None) is not None:
+            model.get_input_embeddings().neftune_noise_alpha = self.neftune_noise_alpha
+        pass
+        if hasattr(self, 'accelerator'):
+            scaler = self.accelerator.scaler
+            current_model = model
+            while hasattr(current_model, 'model'):
+                current_model.accelerator_scaler = scaler
+                current_model = current_model.model
+            current_model.accelerator_scaler = scaler
+        pass
+        
+pass

unsloth_compiled_cache/UnslothXPOTrainer.py

@@ -0,0 +1,1062 @@
+"""
+2025.8.8
+2025.8.9
+4.55.2
+0.21.0
+__UNSLOTH_VERSIONING__
+"""
+from torch import Tensor
+import torch
+import torch.nn as nn
+from torch.nn import functional as F
+from typing import Any, List, Optional, Tuple, Union, Dict, Set, Callable
+from trl.trainer.xpo_trainer import (Any, BaseImageProcessor, BasePairwiseJudge, Callable, Dataset, EvalPrediction, F, FeatureExtractionMixin, IterableDataset, OnlineDPOTrainer, OptimizerNames, Optional, PeftModel, PreTrainedModel, PreTrainedTokenizerBase, ProcessorMixin, SIMPLE_CHAT_TEMPLATE, TrainerCallback, Union, XPOConfig, XPOTrainer, empty_cache, generate_model_card, get_comet_experiment_url, get_reward, is_conversational, is_peft_available, is_wandb_available, jinja2, maybe_apply_chat_template, nn, os, selective_log_softmax, textwrap, torch, truncate_right, unwrap_model_for_generation, wandb)
+
+
+import os
+from typing import *
+from dataclasses import dataclass, field
+from packaging.version import Version
+import torch
+import numpy as np
+from contextlib import nullcontext
+from torch.nn import functional as F
+from transformers import DataCollatorForSeq2Seq, DataCollatorForLanguageModeling as TransformersDataCollatorForLanguageModeling
+
+torch_compile_options = {
+    "epilogue_fusion"   : True,
+    "max_autotune"      : False,
+    "shape_padding"     : True,
+    "trace.enabled"     : False,
+    "triton.cudagraphs" : False,
+}
+
+@torch.compile(dynamic = True, fullgraph = True, options = torch_compile_options,)
+def chunked_selective_log_softmax(logits, index):
+    # Split into 4 chunks only
+    chunked_logits = torch.chunk(logits.reshape(-1, logits.shape[-1]), chunks = 4, dim = 0)
+    chunked_index  = torch.chunk(index.reshape(-1), chunks = 4, dim = 0)
+    all_per_token_logps = []
+    # Below loop does the same as selective_log_softmax(chunk_logits, chunk_index)
+    for chunk_logits, chunk_index in zip(chunked_logits, chunked_index):
+        chunk_logits = chunk_logits.to(torch.float32)
+        selected_logits = torch.gather(chunk_logits, dim = -1, index = chunk_index.unsqueeze(-1)).squeeze(-1)
+        logsumexp_values = torch.logsumexp(chunk_logits, dim = -1)
+        per_token_logps = selected_logits - logsumexp_values
+        all_per_token_logps.append(per_token_logps)
+    pass
+    all_per_token_logps = torch.concat(all_per_token_logps)
+    all_per_token_logps = all_per_token_logps.reshape((logits.shape[0], logits.shape[1]))
+    return all_per_token_logps
+@dataclass
+class UnslothXPOConfig(XPOConfig):
+    """
+    
+    Configuration class for the [`XPOTrainer`].
+
+    Subclass of [`OnlineDPOConfig`] we can use all its arguments and add the following:
+
+    Parameters:
+        alpha (`float` or `list[float]`, *optional*, defaults to `1e-5`):
+            Weight of the XPO loss term. If a list of floats is provided then the alpha is selected for each new epoch
+            and the last alpha is used for the rest of the epochs.
+    
+    """
+    vllm_sampling_params: Optional[Any] = field(
+        default = None,
+        metadata = {'help': 'vLLM SamplingParams'},
+    )
+    unsloth_num_chunks : Optional[int] = field(
+        default = -1,
+        metadata = {'help': 'Chunk size to reduce memory usage. -1 is most efficient.'},
+    )
+    max_seq_length : Optional[int] = field(
+        default = None,
+        metadata = {'help': 'Maximum sequence length to truncate to.'},
+    )
+    def __init__(
+        self,
+        output_dir = None,
+        overwrite_output_dir = None,
+        do_train = False,
+        do_eval = False,
+        do_predict = False,
+        eval_strategy = 'no',
+        prediction_loss_only = False,
+        per_device_train_batch_size = 4,
+        per_device_eval_batch_size = 4,
+        per_gpu_train_batch_size = None,
+        per_gpu_eval_batch_size = None,
+        gradient_accumulation_steps = 2,
+        eval_accumulation_steps = 2,
+        eval_delay = 0,
+        torch_empty_cache_steps = 250,
+        learning_rate = 5e-05,
+        weight_decay = 0.01,
+        adam_beta1 = 0.9,
+        adam_beta2 = 0.999,
+        adam_epsilon = 1e-08,
+        max_grad_norm = 1.0,
+        num_train_epochs = 3.0,
+        max_steps = -1,
+        lr_scheduler_type = 'linear',
+        warmup_ratio = 0.1,
+        warmup_steps = 0,
+        log_level = 'passive',
+        log_level_replica = 'warning',
+        log_on_each_node = True,
+        logging_dir = None,
+        logging_strategy = 'steps',
+        logging_first_step = False,
+        logging_steps = 1,
+        logging_nan_inf_filter = False,
+        save_strategy = 'steps',
+        save_steps = 500,
+        save_total_limit = None,
+        save_safetensors = True,
+        save_on_each_node = False,
+        save_only_model = False,
+        restore_callback_states_from_checkpoint = False,
+        no_cuda = False,
+        use_cpu = False,
+        use_mps_device = False,
+        seed = 3407,
+        data_seed = 3407,
+        jit_mode_eval = False,
+        use_ipex = False,
+        bf16 = False,
+        fp16 = False,
+        fp16_opt_level = 'O1',
+        half_precision_backend = 'auto',
+        bf16_full_eval = False,
+        fp16_full_eval = False,
+        tf32 = None,
+        local_rank = -1,
+        ddp_backend = None,
+        tpu_num_cores = None,
+        tpu_metrics_debug = False,
+        debug = '',
+        dataloader_drop_last = False,
+        eval_steps = None,
+        dataloader_num_workers = 0,
+        dataloader_prefetch_factor = None,
+        past_index = -1,
+        run_name = None,
+        disable_tqdm = None,
+        remove_unused_columns = True,
+        label_names = None,
+        load_best_model_at_end = False,
+        metric_for_best_model = None,
+        greater_is_better = None,
+        ignore_data_skip = False,
+        fsdp = '',
+        fsdp_min_num_params = 0,
+        fsdp_config = None,
+        fsdp_transformer_layer_cls_to_wrap = None,
+        accelerator_config = None,
+        deepspeed = None,
+        label_smoothing_factor = 0.0,
+        optim = 'adamw_8bit',
+        optim_args = None,
+        adafactor = False,
+        group_by_length = False,
+        length_column_name = 'length',
+        report_to = None,
+        ddp_find_unused_parameters = None,
+        ddp_bucket_cap_mb = None,
+        ddp_broadcast_buffers = None,
+        dataloader_pin_memory = True,
+        dataloader_persistent_workers = False,
+        skip_memory_metrics = True,
+        use_legacy_prediction_loop = False,
+        push_to_hub = False,
+        resume_from_checkpoint = None,
+        hub_model_id = None,
+        hub_strategy = 'every_save',
+        hub_token = None,
+        hub_private_repo = None,
+        hub_always_push = False,
+        hub_revision = None,
+        gradient_checkpointing = False,
+        gradient_checkpointing_kwargs = None,
+        include_inputs_for_metrics = False,
+        eval_do_concat_batches = True,
+        fp16_backend = 'auto',
+        push_to_hub_model_id = None,
+        push_to_hub_organization = None,
+        push_to_hub_token = None,
+        mp_parameters = '',
+        auto_find_batch_size = True,
+        full_determinism = False,
+        torchdynamo = None,
+        ray_scope = 'last',
+        ddp_timeout = 1800,
+        torch_compile = False,
+        torch_compile_backend = None,
+        torch_compile_mode = None,
+        include_tokens_per_second = False,
+        include_num_input_tokens_seen = False,
+        neftune_noise_alpha = None,
+        optim_target_modules = None,
+        batch_eval_metrics = False,
+        eval_on_start = False,
+        use_liger_kernel = False,
+        liger_kernel_config = None,
+        eval_use_gather_object = False,
+        average_tokens_across_devices = True,
+        reward_model_path = None,
+        judge = None,
+        max_new_tokens = 64,
+        max_length = 512,
+        temperature = 0.9,
+        missing_eos_penalty = None,
+        loss_type = 'sigmoid',
+        dataset_num_proc = None,
+        disable_dropout = True,
+        use_vllm = False,
+        vllm_model_impl = 'vllm',
+        gpu_memory_utilization = 0.55,
+        ds3_gather_for_generation = True,
+        model_init_kwargs = None,
+        vllm_sampling_params = None,
+        unsloth_num_chunks = -1,
+        max_seq_length = None,
+        **kwargs,
+    ):
+        if learning_rate < 1e-7: raise FloatingPointError(f'Unsloth: Your learning rate of `{learning_rate}` is too small and less than 1e-7! Consider increasing it, otherwise gradient updates will be close to 0!')
+        if learning_rate > 1: raise OverflowError(f'Unsloth: Your learning rate of `{learning_rate}` is way too larger > 1! Consider decreasing it to 1e-1, otherwise gradient updates will explode!')
+        if output_dir is None and save_strategy == 'steps' and save_steps == 500:
+            output_dir = 'unsloth_training_checkpoints'
+            save_strategy = 'no'
+        if dataset_num_proc is None:
+            from multiprocessing import cpu_count
+            dataset_num_proc = min(cpu_count()*2, 2)
+        if temperature <= 0:
+            raise MathError('Unsloth: Please set a positive non-zero temperature since your results will be wrong.')
+        elif temperature >= 10:
+            raise MathError('Unsloth: Please set a positive non-zero temperature less than 10, since sampling will be quite erratic.')
+        
+        
+        super().__init__(
+            output_dir = output_dir,
+            overwrite_output_dir = overwrite_output_dir,
+            do_train = do_train,
+            do_eval = do_eval,
+            do_predict = do_predict,
+            eval_strategy = eval_strategy,
+            prediction_loss_only = prediction_loss_only,
+            per_device_train_batch_size = per_device_train_batch_size,
+            per_device_eval_batch_size = per_device_eval_batch_size,
+            per_gpu_train_batch_size = per_gpu_train_batch_size,
+            per_gpu_eval_batch_size = per_gpu_eval_batch_size,
+            gradient_accumulation_steps = gradient_accumulation_steps,
+            eval_accumulation_steps = eval_accumulation_steps,
+            eval_delay = eval_delay,
+            torch_empty_cache_steps = torch_empty_cache_steps,
+            learning_rate = learning_rate,
+            weight_decay = weight_decay,
+            adam_beta1 = adam_beta1,
+            adam_beta2 = adam_beta2,
+            adam_epsilon = adam_epsilon,
+            max_grad_norm = max_grad_norm,
+            num_train_epochs = num_train_epochs,
+            max_steps = max_steps,
+            lr_scheduler_type = lr_scheduler_type,
+            warmup_ratio = warmup_ratio,
+            warmup_steps = warmup_steps,
+            log_level = log_level,
+            log_level_replica = log_level_replica,
+            log_on_each_node = log_on_each_node,
+            logging_dir = logging_dir,
+            logging_strategy = logging_strategy,
+            logging_first_step = logging_first_step,
+            logging_steps = logging_steps,
+            logging_nan_inf_filter = logging_nan_inf_filter,
+            save_strategy = save_strategy,
+            save_steps = save_steps,
+            save_total_limit = save_total_limit,
+            save_safetensors = save_safetensors,
+            save_on_each_node = save_on_each_node,
+            save_only_model = save_only_model,
+            restore_callback_states_from_checkpoint = restore_callback_states_from_checkpoint,
+            no_cuda = no_cuda,
+            use_cpu = use_cpu,
+            use_mps_device = use_mps_device,
+            seed = seed,
+            data_seed = data_seed,
+            jit_mode_eval = jit_mode_eval,
+            use_ipex = use_ipex,
+            bf16 = bf16,
+            fp16 = fp16,
+            fp16_opt_level = fp16_opt_level,
+            half_precision_backend = half_precision_backend,
+            bf16_full_eval = bf16_full_eval,
+            fp16_full_eval = fp16_full_eval,
+            tf32 = tf32,
+            local_rank = local_rank,
+            ddp_backend = ddp_backend,
+            tpu_num_cores = tpu_num_cores,
+            tpu_metrics_debug = tpu_metrics_debug,
+            debug = debug,
+            dataloader_drop_last = dataloader_drop_last,
+            eval_steps = eval_steps,
+            dataloader_num_workers = dataloader_num_workers,
+            dataloader_prefetch_factor = dataloader_prefetch_factor,
+            past_index = past_index,
+            run_name = run_name,
+            disable_tqdm = disable_tqdm,
+            remove_unused_columns = remove_unused_columns,
+            label_names = label_names,
+            load_best_model_at_end = load_best_model_at_end,
+            metric_for_best_model = metric_for_best_model,
+            greater_is_better = greater_is_better,
+            ignore_data_skip = ignore_data_skip,
+            fsdp = fsdp,
+            fsdp_min_num_params = fsdp_min_num_params,
+            fsdp_config = fsdp_config,
+            fsdp_transformer_layer_cls_to_wrap = fsdp_transformer_layer_cls_to_wrap,
+            accelerator_config = accelerator_config,
+            deepspeed = deepspeed,
+            label_smoothing_factor = label_smoothing_factor,
+            optim = optim,
+            optim_args = optim_args,
+            adafactor = adafactor,
+            group_by_length = group_by_length,
+            length_column_name = length_column_name,
+            report_to = report_to,
+            ddp_find_unused_parameters = ddp_find_unused_parameters,
+            ddp_bucket_cap_mb = ddp_bucket_cap_mb,
+            ddp_broadcast_buffers = ddp_broadcast_buffers,
+            dataloader_pin_memory = dataloader_pin_memory,
+            dataloader_persistent_workers = dataloader_persistent_workers,
+            skip_memory_metrics = skip_memory_metrics,
+            use_legacy_prediction_loop = use_legacy_prediction_loop,
+            push_to_hub = push_to_hub,
+            resume_from_checkpoint = resume_from_checkpoint,
+            hub_model_id = hub_model_id,
+            hub_strategy = hub_strategy,
+            hub_token = hub_token,
+            hub_private_repo = hub_private_repo,
+            hub_always_push = hub_always_push,
+            hub_revision = hub_revision,
+            gradient_checkpointing = gradient_checkpointing,
+            gradient_checkpointing_kwargs = gradient_checkpointing_kwargs,
+            include_inputs_for_metrics = include_inputs_for_metrics,
+            eval_do_concat_batches = eval_do_concat_batches,
+            fp16_backend = fp16_backend,
+            push_to_hub_model_id = push_to_hub_model_id,
+            push_to_hub_organization = push_to_hub_organization,
+            push_to_hub_token = push_to_hub_token,
+            mp_parameters = mp_parameters,
+            auto_find_batch_size = auto_find_batch_size,
+            full_determinism = full_determinism,
+            torchdynamo = torchdynamo,
+            ray_scope = ray_scope,
+            ddp_timeout = ddp_timeout,
+            torch_compile = torch_compile,
+            torch_compile_backend = torch_compile_backend,
+            torch_compile_mode = torch_compile_mode,
+            include_tokens_per_second = include_tokens_per_second,
+            include_num_input_tokens_seen = include_num_input_tokens_seen,
+            neftune_noise_alpha = neftune_noise_alpha,
+            optim_target_modules = optim_target_modules,
+            batch_eval_metrics = batch_eval_metrics,
+            eval_on_start = eval_on_start,
+            use_liger_kernel = use_liger_kernel,
+            liger_kernel_config = liger_kernel_config,
+            eval_use_gather_object = eval_use_gather_object,
+            average_tokens_across_devices = average_tokens_across_devices,
+            reward_model_path = reward_model_path,
+            judge = judge,
+            max_new_tokens = max_new_tokens,
+            max_length = max_length,
+            temperature = temperature,
+            missing_eos_penalty = missing_eos_penalty,
+            loss_type = loss_type,
+            dataset_num_proc = dataset_num_proc,
+            disable_dropout = disable_dropout,
+            use_vllm = use_vllm,
+            vllm_model_impl = vllm_model_impl,
+            gpu_memory_utilization = gpu_memory_utilization,
+            ds3_gather_for_generation = ds3_gather_for_generation,
+            model_init_kwargs = model_init_kwargs,**kwargs)
+        self.vllm_sampling_params = vllm_sampling_params
+        self.unsloth_num_chunks = unsloth_num_chunks
+        self.max_seq_length = max_seq_length
+pass
+
+class _UnslothXPOTrainer(OnlineDPOTrainer):
+    r""""""
+
+    _tag_names = ["trl", "xpo"]
+
+    def __init__(
+        self,
+        model: Union[PreTrainedModel, nn.Module] = None,
+        ref_model: Union[PreTrainedModel, nn.Module] = None,
+        reward_model: Optional[nn.Module] = None,
+        judge: Optional[BasePairwiseJudge] = None,
+        args: Optional[XPOConfig] = None,
+        data_collator: Optional[Callable] = None,
+        train_dataset: Optional[Union[Dataset, IterableDataset]] = None,
+        eval_dataset: Optional[Union[Dataset, dict[str, Dataset]]] = None,
+        processing_class: Optional[
+            Union[PreTrainedTokenizerBase, BaseImageProcessor, FeatureExtractionMixin, ProcessorMixin]
+        ] = None,
+        peft_config: Optional[dict] = None,
+        compute_metrics: Optional[Callable[[EvalPrediction], dict]] = None,
+        callbacks: Optional[list[TrainerCallback]] = None,
+        optimizers: tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR] = (None, None),
+        preprocess_logits_for_metrics: Optional[Callable[[torch.Tensor, torch.Tensor], torch.Tensor]] = None,
+    ) -> None:
+        super().__init__(
+            model=model,
+            ref_model=ref_model,
+            judge=judge,
+            reward_model=reward_model,
+            args=args,
+            data_collator=data_collator,
+            train_dataset=train_dataset,
+            eval_dataset=eval_dataset,
+            processing_class=processing_class,
+            reward_processing_class=processing_class,  # for now, XPOTrainer can't use any reward model
+            peft_config=peft_config,
+            compute_metrics=compute_metrics,
+            callbacks=callbacks,
+            optimizers=optimizers,
+            preprocess_logits_for_metrics=preprocess_logits_for_metrics,
+        )
+
+        self._alpha = self.args.alpha
+
+        # Overwrite the stats dictionary to include XPO specific statistics
+        self.stats = {
+            # Remove "non_score_reward", "rlhf_reward", "scores"
+            # Add "loss/dpo", "loss/xpo"
+            "loss/dpo": [],
+            "loss/xpo": [],
+            "objective/kl": [],
+            "objective/entropy": [],
+            "rewards/chosen": [],
+            "rewards/rejected": [],
+            "rewards/accuracies": [],
+            "rewards/margins": [],
+            "logps/chosen": [],
+            "logps/rejected": [],
+            # Replace "contain_eos_token" by "model_contain_eos_token" and "ref_contain_eos_token"
+            "val/model_contain_eos_token": [],
+            "val/ref_contain_eos_token": [],
+            "alpha": [],
+            "beta": [],
+        }
+        if self.reward_model is not None:
+            # Replace "scores" by "model_scores" and "ref_scores"
+            self.stats["objective/model_scores"] = []
+            self.stats["objective/ref_scores"] = []
+            self.stats["objective/scores_margin"] = []
+
+    @property
+    def alpha(self):
+        if isinstance(self._alpha, list):
+            epoch = self.state.epoch
+            return self._alpha[epoch] if epoch < len(self._alpha) else self._alpha[-1]
+        else:
+            return self._alpha
+
+    def _generate_completions(self, prompts, model):
+        with unwrap_model_for_generation(model, self.accelerator) as unwrapped_policy_model_for_gen:
+            model_output = unwrapped_policy_model_for_gen.generate(
+                input_ids=prompts["input_ids"],
+                attention_mask=prompts["attention_mask"],
+                generation_config=self.generation_config,
+            )
+
+        actual_model_for_ref_generation: torch.nn.Module
+        if self.ref_model is None:
+            unwrapped_main_model_for_ref_logic = self.accelerator.unwrap_model(model)
+
+            if is_peft_available() and isinstance(unwrapped_main_model_for_ref_logic, PeftModel):
+                actual_model_for_ref_generation = unwrapped_main_model_for_ref_logic.get_base_model()
+            else:
+                actual_model_for_ref_generation = unwrapped_main_model_for_ref_logic
+        else:
+            actual_model_for_ref_generation = self.accelerator.unwrap_model(self.ref_model)
+
+        with unwrap_model_for_generation(actual_model_for_ref_generation, self.accelerator) as final_ref_model_for_gen:
+            ref_output = final_ref_model_for_gen.generate(
+                input_ids=prompts["input_ids"],
+                attention_mask=prompts["attention_mask"],
+                generation_config=self.generation_config,
+            )
+
+        return model_output, ref_output
+
+    def _process_completions(self, model_output, ref_output, prompts):
+        context_length = prompts["input_ids"].shape[1]
+
+        # Process model completions
+        model_completion_ids = model_output[:, context_length:]
+        model_completion_ids, model_completion_mask = truncate_right(
+            model_completion_ids, self.processing_class.eos_token_id, self.processing_class.pad_token_id
+        )
+        model_data = {
+            "input_ids": torch.cat((prompts["input_ids"], model_completion_ids), dim=1),
+            "attention_mask": torch.cat((prompts["attention_mask"], model_completion_mask), dim=1),
+            "raw": prompts["raw"],
+        }
+
+        # Process reference model completions
+        ref_completion_ids = ref_output[:, context_length:]
+        ref_completion_ids, ref_completion_mask = truncate_right(
+            ref_completion_ids, self.processing_class.eos_token_id, self.processing_class.pad_token_id
+        )
+        ref_data = {
+            "input_ids": torch.cat((prompts["input_ids"], ref_completion_ids), dim=1),
+            "attention_mask": torch.cat((prompts["attention_mask"], ref_completion_mask), dim=1),
+            "raw": prompts["raw"],
+        }
+
+        return model_data, ref_data
+
+    def _compute_rewards(self, model_data, ref_data, context_length):
+        with torch.no_grad():
+            _, model_scores, _ = get_reward(
+                self.reward_model, model_data["input_ids"], self.processing_class.pad_token_id, context_length
+            )
+            _, ref_scores, _ = get_reward(
+                self.reward_model, ref_data["input_ids"], self.processing_class.pad_token_id, context_length
+            )
+
+        # Apply EOS penalty if needed
+        if self.args.missing_eos_penalty is not None:
+            model_contain_eos = torch.any(model_data["input_ids"] == self.processing_class.eos_token_id, dim=-1)
+            ref_contain_eos = torch.any(ref_data["input_ids"] == self.processing_class.eos_token_id, dim=-1)
+            model_scores[~model_contain_eos] -= self.args.missing_eos_penalty
+            ref_scores[~ref_contain_eos] -= self.args.missing_eos_penalty
+
+        return model_scores, ref_scores
+
+    def _compute_judge(self, model_data, ref_data, context_length):
+        prompts = model_data["raw"]
+        model_data_completions = self.processing_class.batch_decode(
+            model_data["input_ids"][:, context_length:], skip_special_tokens=True
+        )
+        model_data_completions = [completion.strip() for completion in model_data_completions]
+
+        ref_data_completions = self.processing_class.batch_decode(
+            ref_data["input_ids"][:, context_length:], skip_special_tokens=True
+        )
+        ref_data_completions = [completion.strip() for completion in ref_data_completions]
+
+        if is_conversational({"prompt": prompts[0]}):
+            model_data_completions = [
+                [{"role": "assistant", "content": completion}] for completion in model_data_completions
+            ]
+            environment = jinja2.Environment()
+            template = environment.from_string(SIMPLE_CHAT_TEMPLATE)
+            prompts = [template.render(messages=message) for message in prompts]
+            model_data_completions = [template.render(messages=completion) for completion in model_data_completions]
+
+            ref_data_completions = [
+                [{"role": "assistant", "content": completion}] for completion in ref_data_completions
+            ]
+            ref_data_completions = [template.render(messages=completion) for completion in ref_data_completions]
+
+        ranks_of_first_completion = self.judge.judge(
+            prompts,
+            list(zip(model_data_completions, ref_data_completions)),
+        )
+        # convert ranks to a True/False mask:
+        # when rank == 0, it means the first completion is the best
+        # when rank == 1, it means the second completion is the best
+        return torch.tensor([rank == 0 for rank in ranks_of_first_completion], device=model_data["input_ids"].device)
+
+    def _compute_logprobs(self, model, model_data, ref_data, context_length):
+        def compute_logprobs_for_data(m, data):
+            output = m(data["input_ids"], attention_mask=data["attention_mask"])
+            logits = output.logits[:, context_length - 1 : -1]
+            token_logprobs = selective_log_softmax(logits, data["input_ids"][:, context_length:])
+            return token_logprobs
+
+        # Compute logprobs for model completions
+        model_logprobs_model_data = compute_logprobs_for_data(model, model_data)
+        # Compute logprobs for model on reference completions (for XPO loss)
+        model_logprobs_ref_data = compute_logprobs_for_data(model, ref_data)
+
+        # Compute logprobs for reference model completions
+        with torch.no_grad():
+            if self.ref_model is None:
+                with model.disable_adapter():
+                    ref_logprobs_model_data = compute_logprobs_for_data(model, model_data)
+                    ref_logprobs_ref_data = compute_logprobs_for_data(model, ref_data)
+            else:
+                ref_logprobs_model_data = compute_logprobs_for_data(self.ref_model, model_data)
+                ref_logprobs_ref_data = compute_logprobs_for_data(self.ref_model, ref_data)
+
+        # Mask padding tokens
+        model_padding_mask = model_data["attention_mask"][:, context_length:] == 0
+        ref_padding_mask = ref_data["attention_mask"][:, context_length:] == 0
+        model_logprobs_model_data = model_logprobs_model_data.masked_fill(model_padding_mask, 0.0)
+        model_logprobs_ref_data = model_logprobs_ref_data.masked_fill(ref_padding_mask, 0.0)
+        ref_logprobs_ref_data = ref_logprobs_ref_data.masked_fill(ref_padding_mask, 0.0)
+        ref_logprobs_model_data = ref_logprobs_model_data.masked_fill(model_padding_mask, 0.0)
+
+        return model_logprobs_model_data, model_logprobs_ref_data, ref_logprobs_ref_data, ref_logprobs_model_data
+
+    def _compute_losses(
+        self,
+        model_logprobs_model_data,
+        model_logprobs_ref_data,
+        ref_logprobs_ref_data,
+        ref_logprobs_model_data,
+        chosen_mask,
+    ):
+        # Compute log probs
+        model_logprobs_model_data_sum = model_logprobs_model_data.sum(1)
+        model_logprobs_ref_data_sum = model_logprobs_ref_data.sum(1)
+        ref_logprobs_ref_data_sum = ref_logprobs_ref_data.sum(1)
+        ref_logprobs_model_data_sum = ref_logprobs_model_data.sum(1)
+
+        chosen_model_logprobs = torch.where(chosen_mask, model_logprobs_model_data_sum, model_logprobs_ref_data_sum)
+        chosen_ref_logprobs = torch.where(chosen_mask, ref_logprobs_model_data_sum, ref_logprobs_ref_data_sum)
+        chosen_log_ratios = chosen_model_logprobs - chosen_ref_logprobs
+
+        rejected_model_logprobs = torch.where(~chosen_mask, model_logprobs_model_data_sum, model_logprobs_ref_data_sum)
+        rejected_ref_logprobs = torch.where(~chosen_mask, ref_logprobs_model_data_sum, ref_logprobs_ref_data_sum)
+        rejected_log_ratios = rejected_model_logprobs - rejected_ref_logprobs
+
+        # Compute logits as the difference between chosen and rejected log ratios
+        logits = chosen_log_ratios - rejected_log_ratios
+
+        if self.args.loss_type == "sigmoid":
+            dpo_losses = -F.logsigmoid(self.beta * logits)
+        elif self.args.loss_type == "ipo":
+            dpo_losses = (logits - 1 / (2 * self.beta)) ** 2
+        else:
+            raise NotImplementedError(f"invalid loss type {self.args.loss_type}")
+
+        # Compute XPO specific loss
+        xpo_losses = self.alpha * model_logprobs_ref_data_sum
+
+        # Total loss
+        loss = (dpo_losses + xpo_losses).mean()
+
+        return loss, dpo_losses, xpo_losses
+
+    def _log_statistics(
+        self,
+        model_data,
+        ref_data,
+        model_logprobs_model_data,
+        model_logprobs_ref_data,
+        ref_logprobs_ref_data,
+        ref_logprobs_model_data,
+        chosen_mask,
+        dpo_losses,
+        xpo_losses,
+        context_length,
+        model_scores=None,
+        ref_scores=None,
+    ):
+        # Helper function to gather and compute mean
+        def gather_mean(tensor):
+            return self.accelerator.gather_for_metrics(tensor).mean().item()
+
+        # Log losses
+        self.stats["loss/dpo"].append(gather_mean(dpo_losses))
+        self.stats["loss/xpo"].append(gather_mean(xpo_losses))
+
+        # Log scores
+        if self.reward_model is not None:
+            self.stats["objective/model_scores"].append(gather_mean(model_scores))
+            self.stats["objective/ref_scores"].append(gather_mean(ref_scores))
+            self.stats["objective/scores_margin"].append(gather_mean(model_scores - ref_scores))
+
+        # Log logprobs
+        model_logprobs_model_data_sum = model_logprobs_model_data.sum(1)
+        model_logprobs_ref_data_sum = model_logprobs_ref_data.sum(1)
+        ref_logprobs_ref_data_sum = ref_logprobs_ref_data.sum(1)
+        ref_logprobs_model_data_sum = ref_logprobs_model_data.sum(1)
+
+        chosen_model_logprobs = torch.where(chosen_mask, model_logprobs_model_data_sum, model_logprobs_ref_data_sum)
+        chosen_ref_logprobs = torch.where(chosen_mask, ref_logprobs_model_data_sum, ref_logprobs_ref_data_sum)
+        chosen_log_ratios = chosen_model_logprobs - chosen_ref_logprobs
+
+        rejected_model_logprobs = torch.where(~chosen_mask, model_logprobs_model_data_sum, model_logprobs_ref_data_sum)
+        rejected_ref_logprobs = torch.where(~chosen_mask, ref_logprobs_model_data_sum, ref_logprobs_ref_data_sum)
+        rejected_log_ratios = rejected_model_logprobs - rejected_ref_logprobs
+
+        self.stats["logps/chosen"].append(gather_mean(chosen_model_logprobs.mean() + chosen_ref_logprobs.mean()))
+        self.stats["logps/rejected"].append(gather_mean(rejected_model_logprobs.mean() + rejected_ref_logprobs.mean()))
+
+        # Log rewards
+        # Compute various statistics
+        chosen_rewards = chosen_log_ratios * self.beta
+        rejected_rewards = rejected_log_ratios * self.beta
+        self.stats["rewards/chosen"].append(gather_mean(chosen_rewards.mean()))
+        self.stats["rewards/rejected"].append(gather_mean(rejected_rewards.mean()))
+
+        # Calculate KL divergence for model and ref data
+        kl_model_data = model_logprobs_model_data - ref_logprobs_model_data
+        kl_ref_data = model_logprobs_ref_data - ref_logprobs_ref_data
+        mean_kl = (kl_model_data.sum(1) + kl_ref_data.sum(1)).mean() / 2
+        self.stats["objective/kl"].append(gather_mean(mean_kl))
+
+        # Calculate entropy for model and ref data
+        entropy_model_data = -model_logprobs_model_data.sum(1)
+        entropy_ref_data = -model_logprobs_ref_data.sum(1)
+        mean_entropy = (entropy_model_data.mean() + entropy_ref_data.mean()) / 2
+        self.stats["objective/entropy"].append(gather_mean(mean_entropy))
+
+        # Calculate margins
+        margin = chosen_rewards - rejected_rewards
+        self.stats["rewards/margins"].append(gather_mean(margin.mean()))
+
+        # Calculate accuracy
+        accuracy = (margin > 0).float()
+        self.stats["rewards/accuracies"].append(gather_mean(accuracy.mean()))
+
+        # Log EOS token statistics
+        model_eos = (model_data["input_ids"][:, context_length:] == self.processing_class.eos_token_id).any(dim=1)
+        ref_eos = (ref_data["input_ids"][:, context_length:] == self.processing_class.eos_token_id).any(dim=1)
+        self.stats["val/model_contain_eos_token"].append(gather_mean(model_eos.float()))
+        self.stats["val/ref_contain_eos_token"].append(gather_mean(ref_eos.float()))
+
+        # Log alpha and beta
+        self.stats["alpha"].append(self.alpha)
+        self.stats["beta"].append(self.beta)
+
+    def training_step(
+        self, model: nn.Module, inputs: dict[str, Union[torch.Tensor, Any]], num_items_in_batch: Optional[int] = None
+    ) -> torch.Tensor:
+        model.train()
+
+        # Apply chat template and tokenize the input
+        batch_size = len(next(iter(inputs.values())))
+        prompts = inputs["prompt"]
+        inputs = [{k: v[i] for k, v in inputs.items()} for i in range(batch_size)]
+        inputs = [maybe_apply_chat_template(x, self.processing_class) for x in inputs]
+        inputs = [self.tokenize_row(x, self.model.config.is_encoder_decoder, self.processing_class) for x in inputs]
+        inputs = self.data_collator(inputs)
+
+        # need the prompt_ only
+        inputs = self._prepare_inputs(inputs)
+        context_length = inputs["prompt_input_ids"].shape[1]
+        prompts = {
+            "input_ids": inputs["prompt_input_ids"],
+            "attention_mask": inputs["prompt_attention_mask"],
+            "raw": prompts,
+        }
+        del inputs
+
+        # Sample completions from both the model and the reference model
+        model_output, ref_output = self._generate_completions(prompts, model)
+
+        # Process model completions
+        model_data, ref_data = self._process_completions(model_output, ref_output, prompts)
+
+        # Compute rewards
+        if self.reward_model is not None:
+            model_scores, ref_scores = self._compute_rewards(model_data, ref_data, context_length)
+            chosen_mask = model_scores >= ref_scores
+        else:
+            model_scores, ref_scores = None, None
+            chosen_mask = self._compute_judge(model_data, ref_data, context_length)
+
+        # Compute logprobs
+        model_logprobs_model_data, model_logprobs_ref_data, ref_logprobs_ref_data, ref_logprobs_model_data = (
+            self._compute_logprobs(model, model_data, ref_data, context_length)
+        )
+
+        # Compute loss
+        loss, dpo_losses, xpo_losses = self._compute_losses(
+            model_logprobs_model_data,
+            model_logprobs_ref_data,
+            ref_logprobs_ref_data,
+            ref_logprobs_model_data,
+            chosen_mask,
+        )
+
+        # Log everything
+        self._log_statistics(
+            model_data,
+            ref_data,
+            model_logprobs_model_data.detach(),
+            model_logprobs_ref_data.detach(),
+            ref_logprobs_ref_data,
+            ref_logprobs_model_data,
+            chosen_mask,
+            dpo_losses.detach(),
+            xpo_losses.detach(),
+            context_length,
+            model_scores,
+            ref_scores,
+        )
+
+        if (
+            self.args.torch_empty_cache_steps is not None
+            and self.state.global_step % self.args.torch_empty_cache_steps == 0
+        ):
+            empty_cache()
+
+        kwargs = {}
+        # For LOMO optimizers you need to explicitly use the learning rate
+        if self.args.optim in [OptimizerNames.LOMO, OptimizerNames.ADALOMO]:
+            kwargs["learning_rate"] = self._get_learning_rate()
+
+        if self.args.n_gpu > 1:
+            loss = loss.mean()  # mean() to average on multi-gpu parallel training
+
+        if self.use_apex:
+            with amp.scale_loss(loss, self.optimizer) as scaled_loss:
+                scaled_loss.backward()
+        else:
+            self.accelerator.backward(loss, **kwargs)
+
+        return loss.detach() / self.args.gradient_accumulation_steps
+
+    def create_model_card(
+        self,
+        model_name: Optional[str] = None,
+        dataset_name: Optional[str] = None,
+        tags: Union[str, list[str], None] = None,
+    ):
+        """
+        Creates a draft of a model card using the information available to the `Trainer`.
+
+        Args:
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
+            tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
+                Tags to be associated with the model card.
+        """
+        if not self.is_world_process_zero():
+            return
+
+        if hasattr(self.model.config, "_name_or_path") and not os.path.isdir(self.model.config._name_or_path):
+            base_model = self.model.config._name_or_path
+        else:
+            base_model = None
+
+        # normalize `tags` to a mutable set
+        if tags is None:
+            tags = set()
+        elif isinstance(tags, str):
+            tags = {tags}
+        else:
+            tags = set(tags)
+
+        if hasattr(self.model.config, "unsloth_version"):
+            tags.add("unsloth")
+
+        tags.update(self._tag_names)
+
+        citation = textwrap.dedent("""\
+        @article{jung2024binary,
+            title        = {{Exploratory Preference Optimization: Harnessing Implicit Q*-Approximation for Sample-Efficient RLHF}},
+            author       = {Tengyang Xie and Dylan J. Foster and Akshay Krishnamurthy and Corby Rosset and Ahmed Awadallah and Alexander Rakhlin},
+            year         = 2024,
+            eprint       = {arXiv:2405.21046}
+        }""")
+
+        model_card = generate_model_card(
+            base_model=base_model,
+            model_name=model_name,
+            hub_model_id=self.hub_model_id,
+            dataset_name=dataset_name,
+            tags=tags,
+            wandb_url=wandb.run.url if is_wandb_available() and wandb.run is not None else None,
+            comet_url=get_comet_experiment_url(),
+            trainer_name="XPO",
+            trainer_citation=citation,
+            paper_title="Exploratory Preference Optimization: Harnessing Implicit Q*-Approximation for Sample-Efficient RLHF",
+            paper_id="2405.21046",
+        )
+
+        model_card.save(os.path.join(self.args.output_dir, "README.md"))
+class UnslothXPOTrainer(_UnslothXPOTrainer):
+    """
+    
+    Initialize XPOTrainer as a subclass of [`OnlineDPOConfig`].
+
+    Args:
+        model (`transformers.PreTrainedModel`):
+            The model to train, preferably an `AutoModelForCausalLM`.
+        ref_model (`PreTrainedModelWrapper`):
+            Hugging Face transformer model with a casual language modelling head. Used for implicit reward computation
+            and loss. If no reference model is provided, the trainer will create a reference model with the same
+            architecture as the model to be optimized.
+        reward_model (`transformers.PreTrainedModel`):
+            The reward model to score completions with, preferably an `AutoModelForSequenceClassification`.
+        judge (`BasePairwiseJudge`):
+            The judge to use for pairwise comparison of model completions.
+        args (`XPOConfig`):
+            The XPO config arguments to use for training.
+        data_collator (`transformers.DataCollator`):
+            The data collator to use for training. If None is specified, the default data collator
+            (`DPODataCollatorWithPadding`) will be used which will pad the sequences to the maximum length of the
+            sequences in the batch, given a dataset of paired sequences.
+        train_dataset (`datasets.Dataset`):
+            The dataset to use for training.
+        eval_dataset (`datasets.Dataset`):
+            The dataset to use for evaluation.
+        processing_class ([`~transformers.PreTrainedTokenizerBase`], [`~transformers.BaseImageProcessor`], [`~transformers.FeatureExtractionMixin`] or [`~transformers.ProcessorMixin`], *optional*, defaults to `None`):
+            Processing class used to process the data. If provided, will be used to automatically process the inputs
+            for the model, and it will be saved along the model to make it easier to rerun an interrupted training or
+            reuse the fine-tuned model.
+        peft_config (`dict`):
+            The peft config to use for training.
+        compute_metrics (`Callable[[EvalPrediction], dict]`, *optional*):
+            The function to use to compute the metrics. Must take a `EvalPrediction` and return a dictionary string to
+            metric values.
+        callbacks (`list[transformers.TrainerCallback]`):
+            The callbacks to use for training.
+        optimizers (`tuple[torch.optim.Optimizer, torch.optim.lr_scheduler.LambdaLR]`):
+            The optimizer and scheduler to use for training.
+        preprocess_logits_for_metrics (`Callable[[torch.Tensor, torch.Tensor], torch.Tensor]`):
+            The function to use to preprocess the logits before computing the metrics.
+    
+    """
+    def __init__(
+        self,
+        model = None,
+        ref_model = None,
+        reward_model = None,
+        judge = None,
+        args = None,
+        data_collator = None,
+        train_dataset = None,
+        eval_dataset = None,
+        processing_class = None,
+        peft_config = None,
+        compute_metrics = None,
+        callbacks = None,
+        preprocess_logits_for_metrics = None,
+        **kwargs
+    ):
+        if args is None: args = UnslothXPOConfig()
+        use_bf16 = getattr(args, 'bf16', False)
+        if type(use_bf16) is not bool: use_bf16 = False
+        use_fp16 = getattr(args, 'fp16', False)
+        if type(use_fp16) is not bool: use_fp16 = False
+        force_float32 = False
+        if os.environ.get('UNSLOTH_FORCE_FLOAT32', '0') == '1':
+            print('Unsloth: Switching to float32 training since model cannot work with float16')
+            force_float32 = True
+        mixed_precision_dtype = os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32')
+        dtype = getattr(model.config, 'torch_dtype', None)
+        if dtype is None: dtype = model.get_input_embeddings().dtype
+        from unsloth_zoo.utils import _get_dtype
+        dtype = _get_dtype(dtype)
+        float16 = dtype == torch.float16
+        if not force_float32 and (float16 and use_bf16): raise TypeError('Unsloth: Model is in float16 precision but you want to use bfloat16 precision. Set fp16 to `True` and bf16 to `False`')
+        if not force_float32 and (not float16 and use_fp16): raise TypeError('Unsloth: Model is in bfloat16 precision but you want to use float16 precision. Set fp16 to `False` and bf16 to `True`')
+        if force_float32:
+            args.fp16 = False
+            args.bf16 = False
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'no'
+        elif (not use_bf16 and not use_fp16) and mixed_precision_dtype == 'float32':
+            args.fp16 = float16
+            args.bf16 = not float16
+            os.environ['ACCELERATE_MIXED_PRECISION'] = 'fp16' if float16 else 'bf16'
+        if getattr(args, 'eval_dataset', None) is not None and getattr(args, 'eval_strategy', 'no') == 'no':
+            args.eval_strategy = 'steps'
+            if getattr(args, 'eval_steps', None) is None: args.eval_steps = 0.1
+        ga_steps = getattr(args, 'gradient_accumulation_steps', None)
+        if ga_steps is not None and ga_steps > 1:
+            from transformers import __version__ as transformers_version
+            if Version(transformers_version) <= Version('4.45.2'):
+                print('**** Unsloth: Please use our fixed gradient_accumulation_steps by updating transformers, TRL and Unsloth!\n'
+                      '`pip install --upgrade --no-cache-dir --force-reinstall --no-deps unsloth transformers trl unsloth_zoo`')
+        if getattr(args, 'eval_strategy', 'no') != 'no':
+            eval_bsz = getattr(args, 'per_device_eval_batch_size', 8)
+            if eval_bsz == 8 and args.per_device_train_batch_size < eval_bsz: args.per_device_eval_batch_size = args.per_device_train_batch_size
+            if getattr(args, 'eval_accumulation_steps', None) is None and ga_steps is not None: args.eval_accumulation_steps = ga_steps
+        fp16_full_eval = getattr(args, 'fp16_full_eval', False)
+        if type(fp16_full_eval) is not bool: fp16_full_eval = False
+        bf16_full_eval = getattr(args, 'bf16_full_eval', False)
+        if type(bf16_full_eval) is not bool: bf16_full_eval = False
+        if args.fp16 and bf16_full_eval: args.bf16_full_eval = False; args.fp16_full_eval = True
+        if args.bf16 and fp16_full_eval: args.bf16_full_eval = True; args.fp16_full_eval = False
+        if force_float32:
+            args.bf16_full_eval = False
+            args.fp16_full_eval = False
+        elif os.environ.get('UNSLOTH_MIXED_PRECISION', 'float32') == 'bfloat16':
+            args.bf16_full_eval = True
+            args.fp16_full_eval = False
+        elif not bf16_full_eval and not fp16_full_eval:
+            args.bf16_full_eval = args.bf16
+            args.fp16_full_eval = args.fp16
+        _output_logits = False
+        if locals().get('compute_metrics', None) is not None: _output_logits = True
+        if locals().get('preprocess_logits_for_metrics', None) is not None: _output_logits = True
+        if _output_logits:
+            os.environ['UNSLOTH_RETURN_LOGITS'] = '1'
+        if 'max_seq_length' not in locals() and not hasattr(args, 'max_seq_length'):
+            pass
+        else:
+            model_max_seq_length = getattr(model, 'max_seq_length', None)
+            args_max_seq_length  = getattr(args,  'max_seq_length', None)
+            if args_max_seq_length is None and model_max_seq_length is not None:
+                max_seq_length = model.max_seq_length
+                if hasattr(args, 'max_seq_length'): args.max_seq_length = max_seq_length
+        if model is not None and hasattr(model, 'for_training'):
+            model.for_training()
+        if 'tokenizer' in locals() and hasattr(tokenizer, 'padding_side'): tokenizer.padding_side = 'right'
+        if 'processing_class' in locals():
+            if hasattr(processing_class, 'padding_side'): processing_class.padding_side = 'right'
+            if hasattr(processing_class, 'tokenizer') and hasattr(processing_class.tokenizer, 'padding_side'): processing_class.tokenizer.padding_side = 'right'
+        __tokenizer = processing_class if 'processing_class' in locals() else tokenizer
+        from unsloth_zoo.vision_utils import UnslothVisionDataCollator
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if isinstance(data_collator, DataCollatorForSeq2Seq) and 'labels' not in train_dataset.column_names:
+                data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer, mlm = False, mlm_probability = 0.0)
+            elif isinstance(data_collator, TransformersDataCollatorForLanguageModeling) and 'labels' in train_dataset.column_names:
+                data_collator = DataCollatorForSeq2Seq(__tokenizer)
+        else:
+            if hasattr(args, 'remove_unused_columns'): args.remove_unused_columns = False
+            if hasattr(args, 'dataset_text_field'): args.dataset_text_field = ''
+            if hasattr(args, 'dataset_kwargs'): args.dataset_kwargs = {'skip_prepare_dataset': True}
+        if not isinstance(data_collator, UnslothVisionDataCollator):
+            if not hasattr(__tokenizer, 'pad') and hasattr(__tokenizer, 'tokenizer'):
+                if isinstance(data_collator, DataCollatorForSeq2Seq):
+                    data_collator = DataCollatorForSeq2Seq(__tokenizer.tokenizer)
+                else:
+                    data_collator = TransformersDataCollatorForLanguageModeling(__tokenizer.tokenizer, mlm = False, mlm_probability = 0.0)
+        other_metrics = []
+        
+        from unsloth_zoo.logging_utils import PatchRLStatistics
+        PatchRLStatistics('xpo_trainer', other_metrics)
+        
+        super().__init__(
+            model = model,
+            ref_model = ref_model,
+            reward_model = reward_model,
+            judge = judge,
+            args = args,
+            data_collator = data_collator,
+            train_dataset = train_dataset,
+            eval_dataset = eval_dataset,
+            processing_class = processing_class,
+            peft_config = peft_config,
+            compute_metrics = compute_metrics,
+            callbacks = callbacks,
+            preprocess_logits_for_metrics = preprocess_logits_for_metrics,**kwargs)
+        if hasattr(self, 'neftune_hook_handle'):
+            self.neftune_hook_handle.remove()
+            if hasattr(self, 'neftune_hook_handle'): del self.neftune_hook_handle
+        if getattr(args, 'neftune_noise_alpha', None) is not None:
+            model.get_input_embeddings().neftune_noise_alpha = self.neftune_noise_alpha
+        pass
+        if hasattr(self, 'accelerator'):
+            scaler = self.accelerator.scaler
+            current_model = model
+            while hasattr(current_model, 'model'):
+                current_model.accelerator_scaler = scaler
+                current_model = current_model.model
+            current_model.accelerator_scaler = scaler
+        pass
+        
+pass

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