Code Arena
Prompt once. Compare multiple AI-built apps for free.
In plain words
Code Arena lets developers test and compare outputs from multiple AI coding models in a single interface. Users enter one prompt and receive side-by-side generated apps or websites from different AI systems. The tool exports finished code directly to GitHub or local IDEs, streamlining the comparison and deployment process. It's designed specifically for developers and is free to use.
written from the facts on this page · September 2026
From the sources
Prompt once and compare outputs from top AI coding models. Arena generates multi-file apps or websites side-by-side. Export ready-to-run code to GitHub or your IDE. Built for developers. Free to use.
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I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
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