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README.md

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+---
+library_name: transformers
+license: apache-2.0
+tags:
+- jamba
+- mamba
+- text-generation-inference
+- moe
+---
+
+# Model Card for Jamba
+
+Jamba is a state-of-the-art, hybrid SSM-Transformer LLM. It delivers throughput gains over traditional Transformer-based models, while outperforming or matching the leading models of its size class on most common benchmarks.
+
+Jamba is the first production-scale Mamba implementation, which opens up interesting research and application opportunities. While this initial experimentation shows encouraging gains, we expect these to be further enhanced with future optimizations and explorations.
+
+This model card is for the base version of Jamba. It’s a pretrained, mixture-of-experts (MoE) generative text model, with 12B active parameters and a total of 52B parameters across all experts. It supports a 256K context length, and can fit up to 140K tokens on a single 80GB GPU.
+
+For full details of this model please read the [release blog post](https://www.ai21.com/blog/announcing-jamba).
+
+## Model Details
+
+- **Developed by:** [AI21](https://www.ai21.com)
+- **Model type:** Joint Attention and Mamba (Jamba)
+- **License:** Apache 2.0
+- **Context length:** 256K
+- **Knowledge cutoff date:** March 5, 2024
+
+## Usage
+### Presequities
+Jamba requires you use `transformers` version 4.39.0 or higher:
+```bash
+pip install transformers>=4.39.0
+```
+
+In order to run optimized Mamba implementations, you first need to install `mamba-ssm` and `causal-conv1d`:
+```bash
+pip install mamba-ssm causal-conv1d>=1.2.0
+```
+You also have to have the model on a CUDA device.
+
+You can run the model not using the optimized Mamba kernels, but it is **not** recommended as it will result in significantly lower latencies. In order to do that, you'll need to specify `use_mamba_kernels=False` when loading the model.
+
+### Run the model
+Please note that, at the moment, `trust_remote_code=True` is required for running the new Jamba architecture.
+```python
+from transformers import AutoModelForCausalLM, AutoTokenizer
+
+model = AutoModelForCausalLM.from_pretrained("ai21labs/Jamba-v0.1",
+                                             trust_remote_code=True)
+tokenizer = AutoTokenizer.from_pretrained("ai21labs/Jamba-v0.1")
+
+input_ids = tokenizer("In the recent Super Bowl LVIII,", return_tensors='pt').to(model.device)["input_ids"]
+
+outputs = model.generate(input_ids, max_new_tokens=216)
+
+print(tokenizer.batch_decode(outputs))
+# ["<|startoftext|>In the recent Super Bowl LVIII, the Kansas City Chiefs emerged victorious, defeating the San Francisco 49ers in a thrilling overtime showdown. The game was a nail-biter, with both teams showcasing their skills and determination.\n\nThe Chiefs, led by their star quarterback Patrick Mahomes, displayed their offensive prowess, while the 49ers, led by their strong defense, put up a tough fight. The game went into overtime, with the Chiefs ultimately securing the win with a touchdown.\n\nThe victory marked the Chiefs' second Super Bowl win in four years, solidifying their status as one of the top teams in the NFL. The game was a testament to the skill and talent of both teams, and a thrilling end to the NFL season.\n\nThe Super Bowl is not just about the game itself, but also about the halftime show and the commercials. This year's halftime show featured a star-studded lineup, including Usher, Alicia Keys, and Lil Jon. The show was a spectacle of music and dance, with the performers delivering an energetic and entertaining performance.\n"]
+```
+
+<details>
+<summary><strong>Loading the model in half precision</strong></summary>
+  
+  The published checkpoint is saved in BF16. In order to load it into RAM in BF16/FP16, you need to specify `torch_dtype`:
+  
+```python
+from transformers import AutoModelForCausalLM
+import torch
+model = AutoModelForCausalLM.from_pretrained("ai21labs/Jamba-v0.1",
+                                             trust_remote_code=True,
+                                             torch_dtype=torch.bfloat16)    # you can also use torch_dtype=torch.float16
+```
+
+When using half precision, you can enable the [FlashAttention2](https://github.com/Dao-AILab/flash-attention) implementation of the Attention blocks. In order to use it, you also need the model on a CUDA device. Since in this precision the model is to big to fit on a single 80GB GPU, you'll also need to parallelize it using [accelerate](https://huggingface.co/docs/accelerate/index):
+```python
+from transformers import AutoModelForCausalLM
+import torch
+model = AutoModelForCausalLM.from_pretrained("ai21labs/Jamba-v0.1",
+                                             trust_remote_code=True,
+                                             torch_dtype=torch.bfloat16,
+                                             attn_implementation="flash_attention_2",
+                                             device_map="auto")
+```
+
+</details>
+<details><summary><strong>Load the model in 8-bit</strong></summary>
+  
+  **Using 8-bit precision, it is possible to fit up to 140K sequence lengths on a single 80GB GPU.** You can easily quantize the model to 8-bit using [bitsandbytes](https://huggingface.co/docs/bitsandbytes/index). In order to not degrade model quality, we recommend to exclude the Mamba blocks from the quantization:
+
+```python
+from transformers import AutoModelForCausalLM, BitsAndBytesConfig
+quantization_config = BitsAndBytesConfig(load_in_8bit=True,
+                                         llm_int8_skip_modules=["mamba"])
+model = AutoModelForCausalLM.from_pretrained("ai21labs/Jamba-v0.1",
+                                             trust_remote_code=True,
+                                             torch_dtype=torch.bfloat16,
+                                             attn_implementation="flash_attention_2",
+                                             quantization_config=quantization_config)
+```
+</details>
+
+### Fine-tuning example
+Jamba is a base model that can be fine-tuned for custom solutions (including for chat/instruct versions). You can fine-tune it using any technique of your choice. Here is an example of fine-tuning with the [PEFT](https://huggingface.co/docs/peft/index) library:
+
+```python
+from datasets import load_dataset
+from trl import SFTTrainer
+from peft import LoraConfig
+from transformers import AutoTokenizer, AutoModelForCausalLM, TrainingArguments
+
+tokenizer = AutoTokenizer.from_pretrained("ai21labs/Jamba-v0.1")
+model = AutoModelForCausalLM.from_pretrained("ai21labs/Jamba-v0.1", trust_remote_code=True, device_map='auto')
+
+dataset = load_dataset("Abirate/english_quotes", split="train")
+training_args = TrainingArguments(
+    output_dir="./results",
+    num_train_epochs=3,
+    per_device_train_batch_size=4,
+    logging_dir='./logs',
+    logging_steps=10,
+    learning_rate=2e-3
+)
+lora_config = LoraConfig(
+    r=8,
+    target_modules=["embed_tokens", "x_proj", "in_proj", "out_proj"],
+    task_type="CAUSAL_LM",
+    bias="none"
+)
+trainer = SFTTrainer(
+    model=model,
+    tokenizer=tokenizer,
+    args=training_args,
+    peft_config=lora_config,
+    train_dataset=dataset,
+    dataset_text_field="quote",
+)
+
+trainer.train()
+```
+
+## Results on common benchmarks
+| Benchmark    | Score |
+|--------------|:-----:|
+| HellaSwag    | 87.1% |
+| Arc Challenge | 64.4% |
+| WinoGrande   | 82.5% |
+| PIQA        | 83.2% |
+| MMLU       | 67.4% |
+| BBH            | 45.4% |
+| TruthfulQA          | 46.4% |
+| GSM8K (CoT)            | 59.9% |
+
+It's crucial that the 'BOS' token is added to all prompts, which might not be enabled by default in all eval frameworks.
+
+
+## Notice
+Jamba is a pretrained base model and did not undergo any alignment for instruct/chat interactions. 
+
+As a base model, Jamba is intended for use as a foundation layer for fine tuning, training, and developing custom solutions. Jamba does not have safety moderation mechanisms and guardrails should be added for responsible and safe use.
+
+## About AI21
+AI21 builds reliable, practical, and scalable AI solutions for the enterprise.
+
+Jamba is the first in AI21’s new family of models, and the Instruct version of Jamba is available in beta via the [AI21 platform](https://www.ai21.com/studio).