This is an HQQ all 4-bit (group-size=64) quantized Hermes-3-Llama-3.1-70B model.
Model size and decoding speed should be similar to the Llama-3.1-70b-instruct_4bitgs64_hqq version.
Usage
First, install the dependecies:
pip install git+https://github.com/mobiusml/hqq.git #master branch fix
pip install bitblas
Also, make sure you use at least torch 2.4.0 or the nightly build.
Then you can use the sample code below:
import torch
from transformers import AutoTokenizer
from hqq.models.hf.base import AutoHQQHFModel
from hqq.utils.patching import *
from hqq.core.quantize import *
from hqq.utils.generation_hf import HFGenerator
#Load the model
###################################################
model_id = 'mobiuslabsgmbh/Hermes-3-Llama-3.1-70B_4bitgs64_hqq'
compute_dtype = torch.bfloat16 #bfloat16 for torchao, float16 for bitblas
cache_dir = '.'
model = AutoHQQHFModel.from_quantized(model_id, cache_dir=cache_dir, compute_dtype=compute_dtype)
tokenizer = AutoTokenizer.from_pretrained(model_id, cache_dir=cache_dir)
quant_config = BaseQuantizeConfig(nbits=4, group_size=64, quant_scale=False, quant_zero=False, axis=1)
patch_linearlayers(model, patch_add_quant_config, quant_config)
#Use optimized inference kernels
###################################################
HQQLinear.set_backend(HQQBackend.PYTORCH)
#prepare_for_inference(model) #default backend
prepare_for_inference(model, backend="torchao_int4")
#prepare_for_inference(model, backend="bitblas") #takes a while to init...
#Generate
###################################################
#For longer context, make sure to allocate enough cache via the cache_size= parameter
gen = HFGenerator(model, tokenizer, max_new_tokens=1000, do_sample=True, compile="partial").warmup() #Warm-up takes a while
gen.generate("Write an essay about large language models", print_tokens=True)
gen.generate("Tell me a funny joke!", print_tokens=True)
gen.generate("How to make a yummy chocolate cake?", print_tokens=True)
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