Opus 5.5 loves to tell you ‘this matters’ (and other AI writing tells)
“Graphite found 13,000 phrases that were at least twice as common in the AI content as human content”
What happened
A study had AI models rewrite 10,000 old articles to find their giveaway words. "Delve" and the em dash are gone. Claude Opus 5.5's new one is "dependable." Disclosure: that is the model that writes this site.