As of: 2026-11-13 13:49 CET. Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/ Canonical page: https://postcutoff.com/p/x-felixrieseberg-2119925633564463609/ # “I wanted to test Fable 5.2’s quality with one-shot prompts without human feedback.” Felix Rieseberg (@felixrieseberg), X, 2026-11-09. Source: https://x.com/felixrieseberg/status/2119925633564463609 ## Archived text > I wanted to test Fable 5.2's quality with one-shot prompts without human feedback. > > Everything in this game is from scratch: models, sounds, textures. ~$550 at API pricing, ~2.7M output and 445M input tokens, heavily cached. Took 8 hours! > > Play it here: https://claude.ai/artifact/BGY1SztrAYcJQHSsnHHGmp Archived 2026-11-12 via fxtwitter (unofficial). Counts: 4,276,121 views, 14,445 likes, 1,113 reposts, 822 replies (at fetch time) Media: https://video.twimg.com/amplify_video/2119919821538447360/vid/avc1/3648x2022/y1dhMLmyKZ-oidQ6.mp4?tag=29 ## Cited in - 2026-11-09: [Anthropic releases Claude Fable 5.2 and Claude Mythos 5.2](https://postcutoff.com/e/2026-11-09-claude-fable-5-2-mythos-5-2/)