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Meta's[1] post 'Introducing Llama 3.1: Our most capable models to date' is dated July 23, 2024 and says the models are available to download that day; Zuckerberg's open letter and TechCrunch[6] carry the same date.Meta releases Llama 3.1 in 8B, 70B and 405B sizes with a 128K context window; the 405B, trained on over 15 trillion tokens, is billed as the first frontier-level open model and is free to download.
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