What are AI stylometric fingerprints?

32D vectors capturing word variety, sentence shapes, punctuation ticks — z-scored for fair fights.

Which AI models are most similar?

Mistral Large 2/3 at 84.8% clone score; Gemini Flash Lite shadows Claude Opus at 78%.

Grab the Node.js scripts, eval your outputs, dodge clones or hunt bargains.

AI models aren't as unique as they seem. A massive stylometric study fingerprints 178 of them, revealing eerie clones and bargain-bin mimics.

theAIcatchup Apr 08, 2026 4 min read

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#AI stylometry #LLM fingerprints #model clustering #writing styles

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Originally reported by Hacker News