KwaiPilot: KAT-Coder-Pro V1

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KAT-Coder-Pro V1 is KwaiKAT's most advanced agentic coding model, built by Kuaishou's Kwaipilot team and designed specifically for real-world software engineering tasks.

It achieves a 73.4% solve rate on SWE-Bench Verified, reflecting strong performance on practical code generation and bug-fixing scenarios. The model has been optimized for tool-use capability, multi-turn interaction, and instruction following through a multi-stage training pipeline that includes supervised fine-tuning, reinforcement fine-tuning, and agentic RL.

KAT-Coder-Pro V1 supports multi-tool parallel invocation, enabling it to complete complex agentic workflows with fewer interaction rounds. It offers a 256K-token context window and up to 128K output tokens. It's a text-only, non-reasoning model — so expect direct responses without chain-of-thought overhead, well-suited for coding agents and automated engineering pipelines.

Context Window N/A

tokens

Max Output 128K

tokens

Input Cost $0.21

per million tokens

Output Cost $0.83

per million tokens

Release Date Sep 1, 2025

 

Code Example

Add AI to your app with the Puter.js AI API — no API keys or setup required.

// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';

puter.ai.chat("Explain quantum computing in simple terms").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").then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

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KAT-Coder-Pro V2

KAT-Coder-Pro V2 is the flagship agentic coding model from Kwaipilot (Kuaishou's AI research division), built for enterprise-grade software engineering and SaaS integration. It uses a Mixture-of-Experts architecture with 72B active parameters and offers a 256K token context window. The model achieves a 79.6% solve rate on SWE-Bench Verified, placing it among the top code generation models globally. It scores 44 on the Artificial Analysis Intelligence Index, well above the median of 15 for comparable non-reasoning models in its price tier, and generates output at roughly 109 tokens per second. KAT-Coder-Pro V2 is designed for large-scale production environments, multi-system coordination, and agentic coding workflows. It also supports tool use, function calling, and web aesthetics generation for producing landing pages and presentation decks.

Frequently Asked Questions

How do I use KAT-Coder-Pro V1?

You can access KAT-Coder-Pro V1 by KwaiPilot through Puter.js AI API. Include the library in your web app or Node.js project and start making calls with just a few lines of JavaScript — no backend and no configuration required. You can also use it with Python or cURL via Puter's OpenAI-compatible API.

Is KAT-Coder-Pro V1 free?

Yes, it is free if you're using it through Puter.js. With the User-Pays Model, you can add KAT-Coder-Pro V1 to your app at no cost — your users pay for their own AI usage directly, making it completely free for you as a developer.

What is the pricing for KAT-Coder-Pro V1?
Pricing for KAT-Coder-Pro V1 is based on the number of input and output tokens used per request.
Price per 1M tokens
Input$0.21
Output$0.83
Who created KAT-Coder-Pro V1?

KAT-Coder-Pro V1 was created by KwaiPilot and released on Sep 1, 2025.

What is the max output length of KAT-Coder-Pro V1?

KAT-Coder-Pro V1 can generate up to 128K tokens in a single response.

Does it work with React / Vue / Vanilla JS / Node / etc.?

Yes — the KAT-Coder-Pro V1 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.

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