The first commercially usable open-weight model competitive with ChatGPT — Llama 2 established the template for responsible open-source release of aligned LLMs.
Releases Llama 2, a family of 7B-70B models with a commercially permissive license. Includes Llama 2-Chat, fine-tuned with RLHF, which approaches GPT-3.5 on human evaluations. Details the safety alignment process.