Hermes 4 405B
Nous Research
nousresearch/hermes-4-405bHermes 4 405B is Nous Research's next-generation fine-tune built on a Llama 3.1 405B base, improving on Hermes 3 with better reasoning, coding, and structured output while keeping a highly steerable, less-restricted persona. It suits users who want a large open-weight model with strong general capability and flexible alignment.
Cost rate
0.7x
Context
131K
Released
Aug 26, 2025
Input
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Output
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Support
ReasoningTool callingStructured outputs