Mollick's Fable 5.2 experiment: 25,000 agents autonomously build 450+ linked 3D worlds
emollick · x · 2026-11-10
Ethan Mollick shared one of his favorite experiments: he told Fable 5.2 to build an endless, hands-off journey through 3D worlds linked by portals.
- 25,000 agents ran autonomously, creating 450+ worlds inspired by books, art and places, all in code.
- Playable on the web (portals-endless-worlds.netlify.app), with code open-sourced on GitHub.
- A striking demo of long-horizon autonomous agent creativity.
Related event: Ethan Mollick lets 25,000 agents autonomously build 450 linked 3D worlds(4 posts)→
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