ONESHOTTED@oneshottedAI
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Episode 01 — MS Paint

Claude Code and Codex each get one prompt to rebuild Microsoft Paint from scratch. No follow-ups, no fixes.

CODEX

3:21

build time

VS

CLAUDE CODE

27:36

build time

Faster isn’t the same as better — the win goes to the build that actually holds up.

CLAUDE CODE WINS

TRY THEM YOURSELF

CHALLENGERTry Codex’s build↗WINNERTry Claude’s build↗

Opens the untouched build in a new tab. Nothing was fixed after the timer stopped.

THE PROMPT — VERBATIM, BOTH AGENTS
Initialize a new Vite + React + Tailwind CSS project in the current directory, then build a browser-based MS Paint clone as a single-page app. Required: pencil, brush with 3 sizes, eraser, fill bucket, color palette + custom color picker, shapes (rectangle, ellipse, line), text tool, spray can, undo/redo, clear canvas, save as PNG. Faithful Windows-98-style UI. It should feel nostalgic but work flawlessly. Finish with a passing `npm run build`. Surprise me with one feature MS Paint never had.