Meta · Meta AI (Llama)
Llama 3.1 405B
ActiveFirst open-weight model genuinely competitive with GPT-4; maximum self-hosted quality (needs 8x H100s). MMLU 88.6, HumanEval 89.0.
About this version
Llama 3.1 405B is an open‑weight large language model from Meta released in July 2024 and currently active. It expands the Llama 3 series with a 405‑billion‑parameter configuration and supports a context window of up to 128 000 tokens, positioning it as the first openly available model that approaches the performance of proprietary systems such as GPT‑4 when run on high‑end hardware (approximately eight NVIDIA H100 GPUs).
- Context window
- 128K ctx
- Tier
- Open Weight
- Released
- Jul 1, 2024
Release & change timeline
1 event- Release
Llama 3.1 405B released
Extended context to 128K; 405B first open-weight model genuinely competitive with GPT-4. Month known, exact day not stated.
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