Mollick's Claude Fable 5 test highlights hours-long agent work, not another launch demo
Ethan Mollick says Claude Fable 5 worked for hours across research and coding tasks, offering a long-horizon outside read on the Amodeis' agent bet.
By Ryan Merket · Published
Primary source: One Useful Thing
Why it matters
Mollick's account shifts the Fable 5 debate from benchmark scores to operating behavior: whether Anthropic can make long-running agents useful without losing control of them.
Dario Amodei and Daniela Amodei's Anthropic has a detailed public outside account of what Claude Fable 5 feels like in sustained work: in a June 9th One Useful Thing essay, Wharton professor Ethan Mollick says the model could execute multi-page specifications for "up to a dozen hours" and outperformed public models he had used.…
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