Qwen3.5 397B A17B API

Access Qwen3.5 397B A17B from Qwen using Puter.js AI API.

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Model Card

Qwen3.5-397B-A17B is an open-weight native vision-language model from Alibaba's Qwen team, released in February 2026. It uses a hybrid architecture combining Gated Delta Networks (linear attention) with a sparse mixture-of-experts design, totaling 397 billion parameters but activating only 17 billion per forward pass for efficient inference. The model delivers strong performance across reasoning, coding, agent tasks, and multimodal understanding, competing with frontier models like GPT-5.2, Claude 4.5 Opus, and Gemini-3 Pro. It supports 201 languages and dialects and features a 250k-token vocabulary. Its decoding throughput is reported at 8.6x that of Qwen3-Max under a 32k context length.

Context Window 262K

tokens

Max Output N/A

tokens

Input Cost $0.39

per million tokens

Output Cost $2.34

per million tokens

Release Date Feb 16, 2026

 

API Usage Example

Add Qwen3.5 397B A17B 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: "qwen/qwen3.5-397b-a17b"
}).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: "qwen/qwen3.5-397b-a17b"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

View full documentation →

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Frequently Asked Questions

What is this Qwen3.5 397B A17B API about?

The Qwen3.5 397B A17B API gives you access to Qwen's chat model through Puter.js. With just a few lines of JavaScript, you can integrate Qwen3.5 397B A17B into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created Qwen3.5 397B A17B?

Qwen3.5 397B A17B was created by Qwen and released on Feb 16, 2026.

What is the context window of Qwen3.5 397B A17B?

Qwen3.5 397B A17B supports a context window of 262K tokens. For reference, that is roughly equivalent to 524 pages of text.

How much does it cost?
The Qwen3.5 397B A17B API is available through the User-Pays Model. As a developer, you can add the Qwen3.5 397B A17B API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$0.39
Output$2.34
How do I access the Qwen3.5 397B A17B API?

You can access the Qwen3.5 397B A17B 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 Qwen3.5 397B A17B API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the Qwen3.5 397B A17B 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 Qwen3.5 397B A17B to your app without worrying about API keys or setup.

Read the Docs View Tutorials