Models/Nous Research/Hermes 4 405B

Hermes 4 405B

Name: Hermes 4 405B API access
Brand: Nous Research

Nous Research · Open weights · Released Aug 26, 2025 · nousresearch/hermes-4-405b

Best $1.00 in / $3.00 out via Nebius · fp8

Compare Estimate cost

131K contextReasoningStructured outputOpen weights

Available from 1 providerUSD / MTOK · PRICES 23 MINUTES AGO · SPEED 24 HOURS AGO

EST. MONTHLY COSTclick a row for detail · click headers to sort

PROVIDER	INPUT	OUTPUT	CACHE	CONTEXT	QUANT	TTFT	TPS	UPTIME
Nebius	$1.00	$3.00	—	131K	fp8	✕	✕	100.0%

TTFT/TPS: median (P50) over trailing 504h · chat10k profile (~10K in / 200 out) · measured via OpenRouter routing · ✕ = probed, endpoint returned no measurable stream · methodology v1.1 · measured 24 hours ago

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About

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...

Specifications

Context window131,072

Max output117,964

Modalities intext

Modalities outtext

LicenseOpen weights

ReleasedAug 26, 2025

Knowledge cutoff2024-08-31

TokenizerOther

WeightsHugging Face ↗

Open weights

Hugging FaceNousResearch/Hermes-4-405B ↗

Downloads984

Likes96

Licensellama3

safetensors

Hermes 3 70B Instruct$0.70 / $0.70 Hermes 3 405B Instruct$1.00 / $1.00

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Sources

OpenRouter API23 minutes ago

AGGREGATOR

Hugging Face23 minutes ago

COMMUNITY

ModelIndex benchmarks24 hours ago

MEASURED

Verified 23 minutes ago · list prices, not negotiated rates.