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Nous: Hermes 4 405B

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...

Text
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Specification
Model ID
nousresearch/hermes-4-405b
Weight license
Not verified; consult the exact publisher model card
Modality
Text >text
Context
131.1K tokens
Input
$1.00/1M
Output
$3.00/1M
Updated
Nov 14, 2026
Scores
Capabilities
  • No tool calling listed
  • No vision support listed
  • Supports long-context workflows
  • Supports deeper reasoning tasks

Input and output

Accepts Text inputs. Returns Text outputs.

Supported parameters

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokenspresence_penaltyreasoningrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetop_ktop_logprobstop_p

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