Code Arena

Paste one prompt describing a small website or app, and Code Arena returns working multi-file projects from different AI coding models next to each other, so you can judge the results yourself instead of trusting a benchmark score.

Code Arena is an AI model comparison platform for developers that tests coding models on the same task and shows how their output differs in quality, reasoning and accuracy.

Formerly known as LMArena, it now focuses on code.

Once you pick a winner, you can export the code to GitHub or a local IDE.

The Image to Code feature takes a screenshot or mockup and turns it into functional code, which is handy for checking which model reads a design best.

A leaderboard tracks how the various models perform over time, giving you a wider view than any single test.

The fact that you compare outputs side by side is the main appeal.

It is handy for developers who are deciding which model to use for their own projects.