How to Use KAT Coder for Free in Cursor with Atlas Cloud

KAT Coder, developed by Kuaishou’s Kwaipilot team, is one of the most powerful AI coding models available today — excelling at real-world software engineering tasks like feature implementation, debugging, refactoring, and long-context code understanding.

The best part?
You can now use KAT Coder for free inside Cursor, one of the most popular AI-powered code editors, by connecting it to Atlas Cloud, a unified AI model API platform.

This guide walks you through step by step how to integrate KAT Coder Pro and KAT Coder Exp-72B-1010 into Cursor — no extra infrastructure, no cost barrier.

Why Use KAT Coder in Cursor?

Cursor is already loved by developers for its tight IDE + AI workflow. Pairing it with KAT Coder unlocks a next-level coding experience.

What Makes KAT Coder Special?

KAT Coder is not just another code completion model. It’s built for agentic software engineering:

✅ Strong performance on real GitHub issues (SWE-Bench Verified)
✅ Long-context understanding (entire files, modules, repos)
✅ Excellent at debugging, refactoring, and multi-step tasks
✅ Designed to reason, plan, and execute like a junior engineer

Combined with Cursor’s UI, you get an AI coding copilot that actually understands your codebase.

Why Atlas Cloud Is the Easiest Way to Use KAT Coder

Atlas Cloud provides a unified OpenAI-compatible API that lets you access top AI models — including KAT Coder — for free.

Key Benefits for Developers

🔑 OpenAI-compatible API (works seamlessly with Cursor)
💸 Free input & output for KAT Coder models
⚡ Low-latency, production-ready infrastructure
🔁 Easy model switching (Pro / Exp-72B)
🌍 No vendor lock-in

Available models:

text
```
1kwaipilot/kat-coder-pro
```
text
```
1kwaipilot/kat-coder-exp-72b-1010
```

Step 1: Get Your Atlas Cloud API Key

Go to Atlas Cloud
Sign up or log in
Create an API key
Save it securely (you’ll need it for Cursor)

You’ll use this key just like an OpenAI API key — but with Atlas Cloud’s base URL.

Step 2: Configure Cursor to Use Atlas Cloud

Cursor allows you to connect custom OpenAI-compatible endpoints.

Cursor Settings

Open Cursor
Go to Settings → Models / OpenAI
Set the following:

API Key

plaintext
1ATLASCLOUD_API_KEY

Base URL

plaintext
1https://api.atlascloud.ai/v1

Cursor will now route all AI requests through Atlas Cloud.

Step 3: Select KAT Coder as Your Model in Cursor

In Cursor’s model selector (or settings), choose one of the following:

KAT Coder Pro

plaintext
1kwaipilot/kat-coder-pro

KAT Coder Exp-72B-1010 (for advanced / long-context tasks)

plaintext
1kwaipilot/kat-coder-exp-72b-1010

That’s it — no extra configuration required.

How Cursor Talks to KAT Coder (Behind the Scenes)

Cursor uses an OpenAI-style client. Atlas Cloud is fully compatible.

Here’s the reference Python code showing how requests are routed:

python
1import os
2from openai import OpenAI
3
4client = OpenAI(
5    api_key=os.getenv("ATLASCLOUD_API_KEY"),
6    base_url="https://api.atlascloud.ai/v1"
7)
8
9response = client.chat.completions.create(
10    model="kwaipilot/kat-coder-pro",
11    messages=[
12        {"role": "user", "content": "Refactor this Python function to be more readable"}
13    ],
14    max_tokens=800
15)
16
17print(response.choices[0].message["content"])

Cursor does the same thing internally — you just get a beautiful editor UI on top.

Best Use Cases Inside Cursor

Once connected, KAT Coder shines in Cursor workflows like:

🧠 Whole-File Refactoring

“Refactor this file to follow modern TypeScript best practices.”

🐞 Deep Debugging

“Why does this async function sometimes deadlock?”

🔄 Migration Tasks

“Convert this React class component to hooks.”

🧪 Test Generation

“Write unit tests for this service with edge cases.”

📦 Repo-Level Reasoning

“Explain how these modules interact and suggest improvements.”

The Exp-72B model is especially strong for large files and multi-file context.

Pro Tips for Best Results

To get the most out of KAT Coder in Cursor:

Include clear task instructions
Highlight the exact file or function
Use follow-up prompts (“Now optimize performance”, “Add tests”)
Switch between Pro and Exp-72B based on context size

Why This Setup Is Perfect for Indie Devs & Teams

Feature	Cursor + Atlas Cloud
AI Coding	✅ KAT Coder
Cost	✅ Free
Setup Time	✅ 5 minutes
API Compatibility	✅ OpenAI-style
Production Ready	✅ Yes

This makes Atlas Cloud + Cursor one of the best free AI coding stacks available today.

Start Coding with KAT Coder in Cursor — Free

You don’t need to wait for expensive subscriptions or limited trials.

With Atlas Cloud, you can:

Use KAT Coder Pro for everyday coding
Experiment with KAT Coder Exp-72B-1010
Stay inside Cursor, your favorite AI editor
Pay nothing to get started

👉 Models:

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