Claude 3.7 Sonnet (Thinking) API

Access Claude 3.7 Sonnet (Thinking) from Anthropic using Puter.js AI API.

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Model Card

Claude 3.7 Sonnet (Thinking Mode) is Claude 3.7 Sonnet with extended thinking enabled by default. It excels at advanced math, competitive programming, and complex problem-solving by showing visible step-by-step reasoning.

Context Window N/A

tokens

Max Output 64K

tokens

Input Cost $3

per million tokens

Output Cost $15

per million tokens

Release Date Feb 24, 2025

 

API Usage Example

Add Claude 3.7 Sonnet (Thinking) 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: "anthropic/claude-3.7-sonnet:thinking"
}).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: "anthropic/claude-3.7-sonnet:thinking"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

View full documentation →

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Frequently Asked Questions

What is this Claude 3.7 Sonnet (Thinking) API about?

The Claude 3.7 Sonnet (Thinking) API gives you access to Anthropic's chat model through Puter.js. With just a few lines of JavaScript, you can integrate Claude 3.7 Sonnet (Thinking) into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created Claude 3.7 Sonnet (Thinking)?

Claude 3.7 Sonnet (Thinking) was created by Anthropic and released on Feb 24, 2025.

What is the max output length of Claude 3.7 Sonnet (Thinking)?

Claude 3.7 Sonnet (Thinking) can generate up to 64K tokens in a single response.

How much does it cost?
The Claude 3.7 Sonnet (Thinking) API is available through the User-Pays Model. As a developer, you can add the Claude 3.7 Sonnet (Thinking) API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$3
Output$15
How do I access the Claude 3.7 Sonnet (Thinking) API?

You can access the Claude 3.7 Sonnet (Thinking) 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 Claude 3.7 Sonnet (Thinking) API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the Claude 3.7 Sonnet (Thinking) 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 Claude 3.7 Sonnet (Thinking) to your app without worrying about API keys or setup.

Read the Docs View Tutorials