Mistral Medium 3.1 API

Access Mistral Medium 3.1 from Mistral AI using Puter.js AI API.

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Model Card

Mistral Medium 3.1 is Mistral's frontier-class multimodal model released August 2025 with 128K context. It delivers near-frontier performance at $0.4/$2 per million tokens, excelling in reasoning, coding, and enterprise workflows.

Context Window N/A

tokens

Max Output 131K

tokens

Input Cost $0.4

per million tokens

Output Cost $2

per million tokens

Input text, image

modalities

Tool Use Yes

 

Knowledge Cutoff May 2025

 

Release Date Aug 12, 2025

 

API Usage Example

Add Mistral Medium 3.1 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: "mistralai/mistral-medium-2508"
}).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: "mistralai/mistral-medium-2508"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

View full documentation →

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Frequently Asked Questions

What is this Mistral Medium 3.1 API about?

The Mistral Medium 3.1 API gives you access to Mistral AI's chat model through Puter.js. With just a few lines of JavaScript, you can integrate Mistral Medium 3.1 into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created Mistral Medium 3.1?

Mistral Medium 3.1 was created by Mistral AI and released on Aug 12, 2025.

What is the max output length of Mistral Medium 3.1?

Mistral Medium 3.1 can generate up to 131K tokens in a single response.

What is the knowledge cutoff of Mistral Medium 3.1?

Mistral Medium 3.1 has a knowledge cutoff date of May 2025. This means the model was trained on data available up to that date.

What types of input can Mistral Medium 3.1 process?

Mistral Medium 3.1 accepts the following input types: text, image. It produces: text.

Does Mistral Medium 3.1 support tool use (function calling)?

Yes, Mistral Medium 3.1 supports tool use (function calling), allowing it to interact with external tools, APIs, and data sources as part of its response flow.

How much does it cost?
The Mistral Medium 3.1 API is available through the User-Pays Model. As a developer, you can add the Mistral Medium 3.1 API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$0.4
Output$2
How do I access the Mistral Medium 3.1 API?

You can access the Mistral Medium 3.1 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 Mistral Medium 3.1 API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the Mistral Medium 3.1 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 Mistral Medium 3.1 to your app without worrying about API keys or setup.

Read the Docs View Tutorials