Nous-Yarn-Mistral-7b-64k is a state-of-the-art language model for long context, further pretrained on long context data for 1000 steps using the YaRN extension method. It is an extension of Mistral-7B-v0.1 and supports a 64k token context window.

To use, pass trust_remote_code=True when loading the model, for example

python

model = AutoModelForCausalLM.from_pretrained("NousResearch/Yarn-Mistral-7b-64k",
  use_flash_attention_2=True,
  torch_dtype=torch.bfloat16,
  device_map="auto",
  trust_remote_code=True)

In addition you will need to use the latest version of transformers (until 4.35 comes out)

pip install git+https://github.com/huggingface/transformers

Benchmarks

Long context benchmarks:

Model	Context Window	8k PPL	16k PPL	32k PPL	64k PPL	128k PPL
Mistral-7B-v0.1	8k	2.96	-	-	-	-
Yarn-Mistral-7b-64k	64k	3.04	2.65	2.44	2.20	-
Yarn-Mistral-7b-128k	128k	3.08	2.68	2.47	2.24	2.19

Short context benchmarks showing that quality degradation is minimal:

Model	Context Window	ARC-c	Hellaswag	MMLU	Truthful QA
Mistral-7B-v0.1	8k	59.98	83.31	64.16	42.15
Yarn-Mistral-7b-64k	64k	59.38	81.21	61.32	42.50
Yarn-Mistral-7b-128k	128k	58.87	80.58	60.64	42.46

Collaborators

bloc97: Methods, paper and evals
@theemozilla: Methods, paper, model training, and evals
@EnricoShippole: Model training
honglu2875: Paper and evals

The authors would like to thank LAION AI for their support of compute for this model. It was trained on the JUWELS supercomputer.