Opus 5.5 loves to tell you ‘this matters’ (and other AI writing tells)

TechCrunch · 2 weeks ago · 13

Researchers at Graphite analyzed writing habits of frontier language models to identify persistent linguistic “tells” that distinguish AI-generated prose from human writing. They defined 13,000 phrases as tells that were at least twice as common in AI content as in a 10,000-article human control set, finding that Claude Opus 5.5 uses “this matters” 116 times more often and “dependable” 23 times more often. Em-dash overuse is reduced or nearly eliminated, but other telltale constructions shift rather than disappearing, with each model version showing its own distinct quirks.