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Hermes 4

Nous Research August 25 2025

Parameters

14B / 70B / 405B (3 sizes; dense)

License

Apache 2.0

Key Features

Hybrid reasoning family (multi-step CoT + instruction-following); based on Llama 3.1; neutral alignment, uncensored; excels in math, coding, roleplay, and long-context retention; agentic function-calling; 405B flagship offers frontier-level performance with 40K+ context.