Fable 5.2 runs 25,000 agents building 450+ linked 3D worlds unattended
every · x · 2026-11-10
Ethan Mollick shared an experiment letting Anthropic's new Fable 5.2 build an endless, hands-off journey through 3D worlds linked by portals: 25,000 agents created over 450 worlds inspired by books, art, and places, all in code. It's playable and open-sourced on GitHub.
Every.to's review calls Fable 5.2 a paradigm shift: staffer Kieran Klaassen had it build a video editor unattended, producing Everycut—combining Premiere, After Effects, and Ableton-style capabilities—live within three days. The piece argues it's the first model letting professionals ship production-grade tools without reading the code, though it demands a change in how you work.
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