Wharton professor Ethan Mollick, after trying Fable 5.2, says the model is "almost" artificial general intelligence, and that what it lacks is judging whether its work is good enough.

Concept illustration: on a long white desk against a light-blue background sit two laptops, each screen showing a speech bubble, with tent cards above them reading "FABLE 5.2" (left) and "REVIEW AGENT" (middle), and the dark silhouette of a person's head and shoulders, seen from behind, in the foreground at the desk. A wavy paper strip with gray lines links the left laptop's screen to the middle laptop, and a second strip runs right from the middle laptop into a slot in the side of a giant upright red ring binder lettered "RULEBOOK", which is stuffed with pages and white tabs and rises past the top edge; from the second strip, small black insects drop along a dotted line into a small open white box on the desk, and a large black pair of opening quotation marks (“) stands beside the binder at the bottom right. Printed on the image: 87,500 words Rulebook written by agents, per Mollick.

Supervising long multi-agent tasks may shift from catching factual errors to catching scope and length, in Mollick's personal judgment from one uncontrolled experiment. Mollick defines that as an AI as good as most human experts at most intellectual work done on a computer, leaving out the physical world and interaction with people. An economics paper Mollick had the model write ran to 182 pages. In another project building a small 3D world, a team of agents wrote a 204-section, 87,500-word rulebook within 12 days, which Mollick sums up as "The AI had built a bureaucracy.". The reviewing agents only fixed errors and never asked whether the content was too long or repetitive. Mollick discloses early access, with tokens free of charge during that period, and says he takes no money from AI labs and that Anthropic didn't see the article in advance (Ethan Mollick, 2026-11-09). How we checked →

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This item ran in the brief of Nov 10, 2026, alongside 12 other items. How we checked it, the quote checks and what was still missing that day are on that issue's How we checked page.

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SecondSource (2026). "Wharton professor Ethan Mollick, after trying Fable 5.2, says the model is "almost" artificial general intelligence, and that what it lacks is judging whether its work is good enough.." https://secondsource.io/en/expert/2026-11-10-1/. Accessed access date.