Exhibit No. 006 · Games

Kart racer in one shot

A whole kart racing game from one sentence — the post that made people stop scrolling when a new model launched.

Prompt

> Create a Mario Kart–style kart racing game in a single HTML file using Three.js.

Run it in your AI

Opens with the prompt filled in — you press send.

Claude ChatGPT Cursor Lovablebuilds a live preview

Claude Code: claude 'Create a Mario Kart–style kart racing game in a single HTML file using Three.js.'
Codex CLI: codex 'Create a Mario Kart–style kart racing game in a single HTML file using Three.js.'
Any agent: Fetch https://aitestmuseum.com/prompts/kart-racer.txt and complete the task it describes in a single attempt. Save your answer as one self-contained HTML file.

What it tests

Game feel and scope: a track, opponents that race, items, boosts, laps and a HUD, all working together.

Origin

BridgeMind · 2026

378K views on the original post

Prompt wording adapted from the original.

Difficulty

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Results

Verdicts are our own assessment of each answer.

Claude Opus 5.5

Partial

Run on 2026-10-19Open the raw answer

Six karts race three laps with drifting, boost pads, item boxes and a live minimap. But the road surface is never visible — its triangles face downward — so the karts appear to race on plain grass.

Test conditions

Single attempt per test, no retries and no edits afterwards. Run inside a Claude Code agent session, which includes its own system prompt, rather than the raw API.

All results for Claude Opus 5.5

Save the answer as a .html file and open it in a browser to compare it with the one above.