Detect ChatGPT-style writing using a combination of heuristics: uniform sentence lengths, telltale AI phrases, and even vocabulary spread. Returns a 0–100 confidence score.
ChatGPT (and similar GPT-class models) have a recognisable writing style: balanced sentence lengths, frequent transitional phrases ('moreover', 'furthermore', 'in conclusion'), and a tendency toward formal-but-impersonal voice. These patterns are detectable using simple statistical tests.
Paste at least 3 sentences. The tool measures sentence-length variance (low variance = AI-like), counts ChatGPT-favourite phrases from a list of 25+ patterns, and measures vocabulary spread. The combined score weights all three signals into a 0–100 result.
Use it when reviewing client submissions, when checking student essays, when investigating whether a viral post is AI-generated, and when calibrating your own writing to feel less robotic.
Higher accuracy comes from longer samples (5+ sentences). Edited AI text often passes detection — the heuristics work best on unedited output. For reliable detection of LinkedIn-edited or human-polished AI, use a paid ML-based detector like GPTZero.
Sometimes — well-edited AI text can score under 40 (human-like). The detector catches lazy AI, not well-edited AI.
No detector is 100% reliable in 2026. AI detection is a probabilistic estimate — use as one signal, not as proof.
No — heuristics are tuned for English. Other languages need their own phrase lists.
Explore more plagiarism & ai detection on the tool hub — or jump straight to the Plagiarism Checker, AI Content Detector.