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Nous Researchactive

Hermes 4 405B

Released at: August 26, 2025

API StatusAvailable for integration
Context Window131,072 tokens
Input Price / MTok$1.00
Output Price / MTok$3.00

Model Overview

Nous Research · Active Model

  • Long-Context
  • API Available
  • Vetted Benchmarks
  • Production Ready

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...

Developer
Nous Research
Release Date
August 26, 2025
Context Window
131,072 tokens≈ 175 words
API Access
Publicly AvailableIntegrate via official API
Input Cost
$1.00per million tokens
Output Cost
$3.00per million tokens
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Vetted Benchmarks

MMLU(estimated)Score: 78.6% (Top 79%)
HumanEval(estimated)Score: 76.8% (Top 79%)
MATH(estimated)Score: 54.0% (Top 74%)
MT-Bench(estimated)Score: 8.4 (Top 74%)
GPQA(estimated)Score: 39.4% (Top 70%)
HellaSwag(estimated)Score: 81.6% (Top 70%)

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