One prompt, $550 in API fees, 8 hours: a full 3D game built by Fable 5.2

petergyang · x · 2026-11-10

To test Fable 5.2's one-shot quality without human feedback, felixrieseberg generated a complete game from a single prompt — models, sounds, and textures all from scratch. It cost $550 at API pricing, burned 2.7M output and 445M input tokens (heavily cached), and took 8 hours. Playable online; commenters marvel that games like this can be built inside artifacts.

Related event: One-Shot Prompt Gets Claude Fable 5.2 to Build a Complete 3D Game(3 posts)→

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