Nous: Hermes 4 70B API

Access Nous: Hermes 4 70B from Nous Research using Puter.js AI API.

Get Started

Model Card

Hermes 4 70B is a hybrid reasoning model based on Llama-3.1-70B with toggleable deep thinking mode using think tags. It offers major improvements in math, code, STEM, logic, and creative writing while supporting JSON schema adherence, function calling, and reduced refusal rates compared to other models.

Context Window N/A

tokens

Max Output 131K

tokens

Input Cost $0.13

per million tokens

Output Cost $0.4

per million tokens

Release Date Aug 18, 2025

 

API Usage Example

Add Nous: Hermes 4 70B to your app with just a few lines of code.
No API keys, no backend, no configuration required.

// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';

puter.ai.chat("Explain quantum computing in simple terms", {
    model: "nousresearch/hermes-4-70b"
}).then(response => {
    document.body.innerHTML = response.message.content;
});

<html>
<body>
    <script src="https://js.puter.com/v2/"></script>
    <script>
        puter.ai.chat("Explain quantum computing in simple terms", {
            model: "nousresearch/hermes-4-70b"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

View full documentation →

More Models from Nous Research

Chat

Nous: Hermes 4 405B

Hermes 4 405B is a frontier hybrid-mode reasoning model based on Llama-3.1-405B, trained on a 60B to...

 Chat

Nous: Hermes 3 405B Instruct

Hermes 3 Llama 3.1 405B is a frontier-level 405B parameter full fine-tune of Llama-3.1-405B, focused...

 Chat

Nous: Hermes 3 70B Instruct

Hermes 3 Llama 3.1 70B is a 70B parameter fine-tune of Llama-3.1-70B offering advanced agentic capab...

View all Nous Research models →

Frequently Asked Questions

What is this Nous: Hermes 4 70B API about?

The Nous: Hermes 4 70B API gives you access to Nous Research's chat model through Puter.js. With just a few lines of JavaScript, you can integrate Nous: Hermes 4 70B into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created Nous: Hermes 4 70B?

Nous: Hermes 4 70B was created by Nous Research and released on Aug 18, 2025.

What is the max output length of Nous: Hermes 4 70B?

Nous: Hermes 4 70B can generate up to 131K tokens in a single response.

How much does it cost?
The Nous: Hermes 4 70B API is available through the User-Pays Model. As a developer, you can add the Nous: Hermes 4 70B API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$0.13
Output$0.4
How do I access the Nous: Hermes 4 70B API?

You can access the Nous: Hermes 4 70B API with just a few lines of JavaScript — no API keys, no backend, and no configuration required. Include the Puter.js library in your project and start making calls right away. For more details, check out our documentation.

Does the Nous: Hermes 4 70B API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the Nous: Hermes 4 70B API works with any JavaScript framework, Node.js, or plain HTML through Puter.js. Just include the library and start building. See the documentation for more details.

Get started with Puter.js

Add Nous: Hermes 4 70B to your app without worrying about API keys or setup.

Read the Docs View Tutorials