Art, video & music

A demoscene intro in one 280 KB HTML file, made with zero direction

Asked to make the most impressive demo of itself, Claude Opus 5.5 worked for about 5 hours and 697M tokens. Every pixel and sound is generated in code, with no images, audio files, 3D models or libraries.

Made with

Claude Opus 5.5

Role

Mathematical statistician

Posted

23 September 2026

Justin.md@JustinPerea

I asked Claude Opus 5.5 to make the most impressive demo of itself and gave it zero direction.

~5 hours and 697M tokens later, it made this demoscene intro. Every pixel and every sound comes from one 280 KB HTML file. No images, audio files, 3D models, or libraries.

Sound on.

(It also wrote this tweet)

23 Sep 2026View on X