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AI vs Human Writing — Reverse Turing Test

Paste text — heuristic detection of AI authorship

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Learn more — how it works, FAQ & guide
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AI vs Human Writing — Heuristic Detector

Reverse Turing test: paste any text, see heuristic flags suggesting AI authorship. GPT/Claude phrases, em-dash density, generic transitions, perplexity proxies.

How to use this tool

  1. 1

    Paste text

    300+ chars for best signal.

  2. 2

    Heuristic flags

    Phrases, perplexity proxies, em-dashes.

  3. 3

    Probability

    AI-likely % + manual review tips.

Frequently Asked Questions

Is this 100% accurate?
No. Heuristic detection of GPT/Claude-style patterns. False positives common (some humans write very formally), false negatives common (good prompting evades). Use as one signal among many.
Why are em-dashes a flag?
GPT-4 and Claude consistently overuse em-dashes (—). Real humans rarely use them at this density. Statistical pattern across millions of AI samples.
AI-content SEO penalty?
Google does NOT penalize AI content per se. They penalize unhelpful, generic content — which most AI content happens to be. High-quality AI-assisted writing ranks fine.

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