Code Arena
Compare AI coding models side by side and generate multi-file apps from one prompt
Introduction
Code Arena, formerly LMArena, lets developers send one prompt to different AI coding models and compare the results next to each other. It can build multi-file apps or sites, turn screenshots into code, and export to GitHub or a local IDE. A leaderboard tracks model performance.
- Added on
- Nov 2, 2026
- Website
- www.arena.ai
- Pricing model
- Free
- Company
- Arena
Product information
What is Code Arena?
Code Arena (formerly LMArena) is a platform for testing AI coding models against each other. One prompt produces outputs from several models, so you can judge quality, reasoning and accuracy directly.
How to use Code Arena?
Describe what you want to build or upload a screenshot with Image to Code. Compare the side-by-side outputs, then export the chosen code to GitHub or your IDE.
Core features of Code Arena
- Side-by-side model comparison
- Multi-file app and website generation
- Export to GitHub or IDE
- Image to Code
- Real-time quality evaluation
- Model leaderboard
Use cases of Code Arena
- 1Comparing how different models reason about a coding task
- 2Generating a multi-file website from a single prompt
- 3Converting a UI mockup into frontend code
- 4Benchmarking new AI coding models
Frequently asked questions about Code Arena
Is Code Arena free?+
Per the source, it is currently free for developers to use.
Can I export the code Code Arena generates?+
Yes. Ready-to-run code can be exported to GitHub or your IDE.
What is Image to Code in Code Arena?+
It lets you upload a screenshot or mockup and have the AI generate matching code.
Which category is Code Arena in?+
Code Arena is listed under AI Code Assistant.