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Nous: Hermes 4 405B

Reasoning Open Weights

Hermes 4 is a large-scale reasoning model built on Meta-Llama-3.1-405B and released by Nous Research. It introduces a hybrid reasoning mode, where the model can choose to deliberate internally with...

Providers 1
Released Aug 25, 2025
Input Modalities text
Output Modalities text

Available Providers (1)

Provider Model ID Input Cost Output Cost Context Max Output Docs
Kilo Gateway nousresearch/hermes-4-405b $1.00/MTok $3.00/MTok 131.1K 26.2K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output