Claude Opus 5 Builds Complete Game With No External Assets

Tweets describe a developer leaving Claude Opus 5 running for 24 hours to create a fully functional Three.js space game. The model produced every element including code, pixel art, and sound effects without any supplied external assets. One account notes prompts and workflow were shared alongside the output. Observers called the result impressive yet expressed doubt about whether truly zero external resources were involved. The reports position the run as an autonomous generation task rather than a standard assisted coding session.