Graphite finds 13,000 phrases distinguishing AI writing from human
Graphite, a marketing firm, analyzed AI-generated prose to identify persistent linguistic patterns distinguishing it from human writing. The study compared 10,000 pre-ChatGPT articles with AI rewrites of those summaries to minimize bias. Researchers found 13,000 phrases at least twice as common in AI content, including model-specific quirks like Claude Opus 5.5’s overuse of “dependable” (23x…
Key points
- Graphite identified 13,000 phrases at least twice as common in AI-generated writing vs. human samples
- Claude Opus 5.5 overuses ‘dependable’ (23x) and ‘this matters’ (116x) in its output
- OpenAI’s Astra favors ‘another dimension’ phrasing and hedges claims with ‘may provide’
Model pages: Claude Opus 5.5 → · Astra →
Opus 5.5 loves to tell you ‘this matters’ (and other AI writing tells)
TechCrunch AI · 1 October 2026
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