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Llama 3.1 405B

Meta · USA
Frontier-class 405B open model. Self-hosting requires serious compute (8×H100 minimum at FP8). Same Llama community licence caveats as the rest of the family.
Licence facts
Licence
Llama 3.1 Community License
Commercial use
Below 700M MAU
Derivatives
Allowed with naming rule
Attribution
'Built with Llama' required
Parameters
405B dense
Training data
Not disclosed
Last updated
2024-Q3
Known risks
  • Self-hosting cost is prohibitive for most teams
  • MAU cap
  • Training data undisclosed
Sources
→ Model card→ Licence
See also
Llama 3.3 70B· open-weightLlama 4 Maverick· open-weightLlama 4 Scout· open-weight
Reviewed by Ali Madjaji · Last reviewed 2026-04-15
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