Changes from previous version
Adds instruction-tuned chat variants, a 4K context window, and broader commercial availability over LLaMA 1.
Release Summary
Llama 2 brought openly available pretrained and chat models up to 70B parameters with commercial use permitted under Meta's community license.
Timeline
July 18, 2023
Llama 2 released
Meta and Microsoft launch Llama 2 for research and commercial use.