Llama 2
LLaMA2
Llama 2 is an open-source large language model released by Meta in July 2023, free for both research and commercial use . At launch it was positioned as the strongest open-source alternative to GPT-4, addressing a key limitation of its predecessor Llama: while the original model had spawned numerous derivative models globally, those builds were constrained by non-commercial licensing . By mid-2024 it had been surpassed by newer open-source rivals—Google's Gemma 2 9B outperformed Llama 3 8B, and Llama 2 itself had already been eclipsed by Llama 3 and then Llama 3.1, whose 405B version topped even Claude 3.5 Sonnet and GPT-4o on key benchmarks .
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By Elune, edited by Jiumu, curated by Eason On July 19, Meta, Facebook's parent company, released the Llama 2 large language model, making it freely available for both research and commercial use — widely hailed as the most powerful open-source alternative to GPT-4. This marks a significant shift from the previous landscape, where numerous global large language models were built on Llama but constrained by its inability to be used commercially at no cost.
