Build a 3D browser racing game, then make the agent race it to prove it works

Prompt @theSethian gave both Claude Code and Grok Bot in a side-by-side test (Oct 14, 2026), shown on screen in the post's video. The last line makes the agent play its own build; per the author, that's how Grok Bot caught reversed steering.

Copy it

Build a playable 3D browser racing game in a single HTML file: neon track with curves, AI opponent car, lap timer, 3 laps, finish screen with your time. Open it and race one full race to prove it works.

Text copied verbatim from the public source, credited to @theSethian.

Original post by @theSethian ↗