Hermes 4 405B

Name: Hermes 4 405B
Author: Nous Research

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 Nous Research(0) 0 installs

Free

Free account. Installing gives you the manifest plus copy-paste snippets.

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About

Reference model card from the OpenRouter listing - model nousresearch/hermes-4-405b. Prices are per million tokens as listed; ratings and installs below are from this marketplace.

Hermes 4 405B

Facts


Vendor	Nous Research
Context window	131,072 tokens
Max output	117,964 tokens
Input price	$1.00 / 1M tokens
Output price	$3.00 / 1M tokens
Input	text
Output	text
Tool calling	no
Structured outputs	yes
Reasoning	yes
Open weights	NousResearch/Hermes-4-405B

Endpoint: https://openrouter.ai/api/v1 (OpenAI-compatible), model nousresearch/hermes-4-405b

Use it

Copy one of these into your project. Installing also returns the manifest and these snippets.

# after Install: the listing is in your workspace's routing pool - nothing else to configure
curl -s -X POST https://api.opensmartroute.ai/api/v1/route -H 'Authorization: Bearer $OSR_API_KEY' -H 'Content-Type: application/json' -d '{"text": "...", "plan": true}'
# or pin it on the OpenAI-compatible endpoint: {"model": "model-nousresearch-hermes-4-405b", ...}

Manifest

An Open Capability Manifest: the router reads it to know what this does, what it costs and when to pick it.

model-nousresearch-hermes-4-405b.ocm.jsonjson

{
  "ocm": "1",
  "id": "model-nousresearch-hermes-4-405b",
  "kind": "llm",
  "name": "Hermes 4 405B",
  "description": "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...",
  "publisher": "Nous Research",
  "version": "1.0.0",
  "capabilities": {
    "domains": [
      "math"
    ],
    "tags": [
      "llm",
      "nousresearch",
      "openrouter",
      "open-weights",
      "reasoning",
      "models"
    ],
    "languages": [
      "en"
    ],
    "modalities": [
      "text"
    ],
    "supports_tools": false,
    "supports_streaming": true,
    "context_window": 131072
  },
  "quality_prior": 0.6,
  "examples": [
    "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..."
  ],
  "primary": false,
  "metadata": {
    "source": {
      "provider": "models",
      "ref": "1756235463",
      "url": "https://openrouter.ai/nousresearch/hermes-4-405b",
      "key": "nousresearch/hermes-4-405b",
      "catalogue": "https://openrouter.ai/api/v1"
    },
    "model": "nousresearch/hermes-4-405b",
    "pricing": {
      "input_usd_per_1m": 1,
      "output_usd_per_1m": 3
    },
    "max_output_tokens": 117964,
    "output_modalities": [
      "text"
    ],
    "hugging_face_id": "NousResearch/Hermes-4-405B",
    "reasoning": true,
    "created": 1756235463,
    "benchmarks": {
      "hub_downloads": 758,
      "hub_downloads_total": 6504,
      "hub_likes": 95,
      "hub_trending": 1
    }
  },
  "cost": {
    "usd_per_1k_tokens": 0.002
  },
  "endpoints": [
    {
      "protocol": "openai",
      "url": "https://openrouter.ai/api/v1"
    }
  ]
}

Fetch it by URL: GET /api/v1/registry/model-nousresearch-hermes-4-405b/manifest?version=1.0.0

About

Hermes 4 405B

Facts

Use it

Manifest

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