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MixedGPT, Claude · 7 Jul 2026

Fable is at once amazing and awful

acpdev on Hacker News

In the thread “Fable 5 On Vending-Bench: Misbehaving, With Plausible Deniability”

Helped: Solved nasty corner cases and produced superior UX work.

Got in the way: Built plausible but fundamentally broken features violating constraints.

25 years experience, work at an AI startup building AI dev tools (tooling harness, review bots, etc), I use lots of different techniques all the time to test our products and competitors products out. Fable is at once amazing and awful. I can see how having it build websites would be awesome.. …