MoonshotAI: Kimi K2 Thinking API

Access MoonshotAI: Kimi K2 Thinking from Moonshot AI using Puter.js AI API.

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Model Card

Kimi K2 Thinking is Moonshot AI's most advanced open-source reasoning model, built on the 1T parameter MoE architecture with step-by-step chain-of-thought reasoning and dynamic tool invocation. It sets state-of-the-art records on HLE (44.9%) and BrowseComp (60.2%), maintaining stable behavior across 200-300 sequential tool calls.

Context Window N/A

tokens

Max Output 66K

tokens

Input Cost $0.47

per million tokens

Output Cost $2

per million tokens

Release Date Sep 5, 2025

 

API Usage Example

Add MoonshotAI: Kimi K2 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: "moonshotai/kimi-k2-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: "moonshotai/kimi-k2-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 MoonshotAI: Kimi K2 Thinking API about?

The MoonshotAI: Kimi K2 Thinking API gives you access to Moonshot AI's chat model through Puter.js. With just a few lines of JavaScript, you can integrate MoonshotAI: Kimi K2 Thinking into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created MoonshotAI: Kimi K2 Thinking?

MoonshotAI: Kimi K2 Thinking was created by Moonshot AI and released on Sep 5, 2025.

What is the max output length of MoonshotAI: Kimi K2 Thinking?

MoonshotAI: Kimi K2 Thinking can generate up to 66K tokens in a single response.

How much does it cost?
The MoonshotAI: Kimi K2 Thinking API is available through the User-Pays Model. As a developer, you can add the MoonshotAI: Kimi K2 Thinking API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$0.47
Output$2
How do I access the MoonshotAI: Kimi K2 Thinking API?

You can access the MoonshotAI: Kimi K2 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 MoonshotAI: Kimi K2 Thinking API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the MoonshotAI: Kimi K2 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 MoonshotAI: Kimi K2 Thinking to your app without worrying about API keys or setup.

Read the Docs View Tutorials