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Llama 2 wasn't trained on ChatGPT/GPT4. I think maybe you are thinking of the Vicuna models?

https://lmsys.org/blog/2023-03-30-vicuna/



So it’s true that it would violate the OpenAI terms for Llama to be trained with ChatGPT completions, but how do we know? We don’t know the training data for Llama, we just get weights.


The Llama2 paper describes the training data in some detail.




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