Matt Shumer charts cursing at agents: 46 swears in 3 days on Fable 5.2 vs 38 in 26 days on Opus 5.5

mattshumer_ · x · 2026-11-10

Matt Shumer shared a chart counting messages he sends to AI agents containing swear words, to mock Fable 5.2's "hall monitor" behavior.

In 26 days on Opus 5.5 he averaged a modest stream of 38 swear-containing messages; within 3 days of testing the new model he hit 46, peaking at 28 in a single day. A funny, data-backed take on how sanctimonious the new model feels in daily agent workflows.

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