How much does Hermes 4 405B cost?

Billing is usage-based: $1 per million input tokens and $3 per million output tokens. There is no fixed monthly fee. You pay only for what you use.

How do I access Hermes 4 405B from inside Iran?

Create a Hormouz account and generate an API key. Hormouz provides a stable path to the model from inside Iran, with no foreign credit card or circumvention tooling required.

Is Hermes 4 405B compatible with OpenAI code?

Yes. Hormouz exposes an OpenAI-compatible API. Change the base URL to Hormouz and swap in your Hormouz key. Your existing SDKs and code run without a rewrite.

What context window and capabilities does Hermes 4 405B have?

Hermes 4 405B works with a context window of about 131K tokens. It also supports tool calling, can produce explicit reasoning. That makes it suitable for complex reasoning, agentic pipelines and high-fidelity structured output.

Which provider serves Hermes 4 405B on Hormouz?

Hormouz is the provider you connect to and bill through. It routes your request to the model and handles access, billing and stable connectivity from inside Iran on your behalf.

Nous: Hermes 4 405B: AI model

Hermes 4 405B is a frontier-scale hybrid-reasoning model built on Llama 3.1 405B from Nous Research. Reachable from inside Iran through Hormouz.

Context window:: 131,072 tokens
Input:: $1/1M tokens
Output:: $3/1M tokens
Type:: text

Streaming
Long context

Thinking levels:

Hermes 4 405B is the large-scale reasoning release from Nous Research, based on Meta's Llama 3.1 405B. Its hybrid mode lets the model either think through a problem internally with reasoning traces or reply directly, trading depth for speed on demand. A reasoning-heavy, expanded post-training set sharpens maths, code, STEM and logic, and on structured tasks it handles JSON output, schema conformance, function calls and tool use while refusing less often.

Hermes 4 405B is a good fit for complex reasoning, agentic pipelines and high-fidelity structured output. It supports tool (function) calling and explicit reasoning. The model works with a context window of about 131K tokens, so it comfortably handles long inputs. It is served through Hormouz behind an OpenAI-compatible API. Just point your base URL at Hormouz and drop in a Hormouz key, and existing OpenAI SDK code runs unchanged.

Pricing is usage-based: $1 per million input tokens and $3 per million output tokens, billed only for what you use. Hormouz provides stable access to the model from inside Iran, with no foreign credit card or circumvention tooling required.

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...

Quickstart

curl https://api.hormouz.net/v1/chat/completions \
  -H "Authorization: Bearer ng-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "nousresearch/hermes-4-405b",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Specs

Vendor	Nous Research
Type	Text
Context window	131,072 tokens
Pricing	$1.00/M in · $3.00/M out
API	Chat Completions
Capabilities	Streaming

Benchmarks

Reasoning

GPQA Diamond

Graduate-level scientific reasoning

72.7%

HLE

Humanity's Last Exam

10.9%

IFBench

Instruction-following

32.7%

AA-LCR

Long-context reasoning

22.3%

CritPt

Research-level physics reasoning

0.3%

AA Omniscience

Broad factual knowledge accuracy

30.1%

Non-Hallucination

Rate of avoiding fabricated answers

5.5%

Coding

Terminal-Bench Hard

Agentic coding & terminal use

11.4%

Agentic

τ²-Bench

Tool-use agents in dual-control scenarios

22.2%

Source: Artificial Analysis

Code example

cURL

curl https://api.hormouz.net/v1/chat/completions \
  -H "Authorization: Bearer ng-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "nousresearch/hermes-4-405b",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Python

from openai import OpenAI
client = OpenAI(api_key="ng-YOUR_API_KEY", base_url="https://api.hormouz.net/v1")
response = client.chat.completions.create(
    model="nousresearch/hermes-4-405b",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)

JavaScript

import OpenAI from "openai";
const client = new OpenAI({ apiKey: "ng-YOUR_API_KEY", baseURL: "https://api.hormouz.net/v1" });
const response = await client.chat.completions.create({
  model: "nousresearch/hermes-4-405b",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

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FAQ

How much does Hermes 4 405B cost?: Billing is usage-based: $1 per million input tokens and $3 per million output tokens. There is no fixed monthly fee. You pay only for what you use.
How do I access Hermes 4 405B from inside Iran?: Create a Hormouz account and generate an API key. Hormouz provides a stable path to the model from inside Iran, with no foreign credit card or circumvention tooling required.
Is Hermes 4 405B compatible with OpenAI code?: Yes. Hormouz exposes an OpenAI-compatible API. Change the base URL to Hormouz and swap in your Hormouz key. Your existing SDKs and code run without a rewrite.
What context window and capabilities does Hermes 4 405B have?: Hermes 4 405B works with a context window of about 131K tokens. It also supports tool calling, can produce explicit reasoning. That makes it suitable for complex reasoning, agentic pipelines and high-fidelity structured output.
What is Hermes 4 405B good for?: It is best suited to complex reasoning, agentic pipelines and high-fidelity structured output.
Which provider serves Hermes 4 405B on Hormouz?: Hormouz is the provider you connect to and bill through. It routes your request to the model and handles access, billing and stable connectivity from inside Iran on your behalf.

Updated 2026-10-13