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...

by NousResearch

Overview

Quick stats across all benchmark runs.

Score

—

10 benchmarks

Avg Latency

16.0s

14 requests

Pricing

$1.00 in / $3.00 out

per 1M tokens

Context

131K

tokens

Alternatives

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Benchmark Performance

How this model performs across different benchmarks

Benchmark	Score	Rank
Evalry Knowledge Benchmark	0%	1 / 8

Price vs Performance

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Current model (baseline)

Other models (relative score)

Y-axis shows score difference from shared benchmarks. X-axis uses log scale.

Score Over Time

Performance trends across all benchmark runs

Benchmark Activity

Number of benchmark runs over time

Quickstart

View on OpenRouter

Get started with this model using OpenRouter

import { OpenRouter } from "@openrouter/sdk";

const openrouter = new OpenRouter({
  apiKey: "<OPENROUTER_API_KEY>"
});

const completion = await openrouter.chat.completions.create({
  model: "nousresearch/hermes-4-405b",
  messages: [
    {
      role: "user",
      content: "Hello!"
    }
  ]
});

console.log(completion.choices[0].message.content);

Get your API key at openrouter.ai/keys

Other Models from NousResearch

Compare performance with other models from the same creator

Model	Latency	Cost/1M	Score
Hermes 4 70B	7.0s	$0.27	—
Hermes 2 Pro - Llama-3 8B	12.8s	$0.14	—
Hermes 3 405B Instruct	22.4s	$1.00	—
Hermes 3 70B Instruct	165.0s	$0.30	—
DeepHermes 3 Mistral 24B Preview	—	$0.06	—