DeepSeek: DeepSeek V3.1 Terminus API

Access DeepSeek: DeepSeek V3.1 Terminus from DeepSeek using Puter.js AI API.

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DeepSeek V3.1-Terminus is the September 2025 refined update to V3.1, addressing user-reported issues like language mixing and improving Code Agent and Search Agent capabilities. It represents the final, most stable version of the V3 architecture before V3.2.

Context Window N/A

tokens

Max Output N/A

tokens

Input Cost $0.21

per million tokens

Output Cost $0.79

per million tokens

Release Date Sep 22, 2025

 

API Usage Example

Add DeepSeek: DeepSeek V3.1 Terminus 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: "deepseek/deepseek-v3.1-terminus"
}).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: "deepseek/deepseek-v3.1-terminus"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

View full documentation →

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Frequently Asked Questions

What is this DeepSeek: DeepSeek V3.1 Terminus API about?

The DeepSeek: DeepSeek V3.1 Terminus API gives you access to DeepSeek's chat model through Puter.js. With just a few lines of JavaScript, you can integrate DeepSeek: DeepSeek V3.1 Terminus into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created DeepSeek: DeepSeek V3.1 Terminus?

DeepSeek: DeepSeek V3.1 Terminus was created by DeepSeek and released on Sep 22, 2025.

How much does it cost?
The DeepSeek: DeepSeek V3.1 Terminus API is available through the User-Pays Model. As a developer, you can add the DeepSeek: DeepSeek V3.1 Terminus API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$0.21
Output$0.79
How do I access the DeepSeek: DeepSeek V3.1 Terminus API?

You can access the DeepSeek: DeepSeek V3.1 Terminus 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 DeepSeek: DeepSeek V3.1 Terminus API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the DeepSeek: DeepSeek V3.1 Terminus 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 DeepSeek: DeepSeek V3.1 Terminus to your app without worrying about API keys or setup.

Read the Docs View Tutorials