, from Meta, is a powerful language model that is free for both research and commercial use. It's available both as a raw pretrained model and, fine-tuned, as Llama-2-chat for conversation and for code completion. Since it's available in a variety of sizes ¡ª 7B, 13B, and 70B ¡ª Llama 2 is a good option for a self-hosted LLM, if you want to control your data.
Meta describes Llama 2 as "open source," a claim that . Meta's license and acceptable use policy put restrictions on commercial use for some users and also restricts the use of the model and software for certain purposes. The Llama 2 training data is not open, which can hamper the ability to understand and change the model. That said, the availability of a powerful, capable model in at least a "semi-open" form is welcome.
