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Nous: Hermes 4 405B

405B

byNous

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...

Input Price$1.00/1M tokens
Output Price$3.00/1M tokens
Intelligence17.6
Coding18.1

Specifications

Technical details and pricing.

ProviderNous
Context Window131,072 tokens
Release DateAug 27, 2025
ModalitiesText
CapabilitiesJSON Mode

Benchmarks

10 benchmark scores from Artificial Analysis.

GPQA53.6%
MMLU Pro72.9%
HLE4.2%
LiveCodeBench54.6%
AIME 202515.3%
SciCode34.6%
LCR20.0%
IFBench34.8%
Tau226.6%
TerminalBench Hard9.8%

Composite Indices

Higher is better; speed and price are normalized

Standard Benchmarks

Only benchmarks with data are shown

Frequently Asked Questions

What is Nous: Hermes 4 405B good for?

Use Nous: Hermes 4 405B for everyday tasks like writing, summarizing, brainstorming, and getting clear explanations.

How much does Nous: Hermes 4 405B cost?

Pricing is based on usage. Current rates are $1.00/1M tokens for input and $3.00/1M tokens for output.

Can I try Nous: Hermes 4 405B for free?

Yes. You can start a chat instantly and test the model before deciding on a plan.

Does Nous: Hermes 4 405B support images or audio?

Nous: Hermes 4 405B focuses on text-based tasks.

Benchmarks and pricing use Artificial Analysis where available. Catalog specs are used as a fallback.