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Multi-Engine AI Detection

Detect GPT-4 Writing — Free Measured Scanner

GPT-4 produces sophisticated text. One detector might miss it. Three working together give you certainty.

Verified by 211-Sample Benchmark·94.2% Accuracy · 2.5% FPR · 96.1% TPR·See methodology →

Free scan: we analyze your first ~300 characters

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0-30: Likely Human31-70: Uncertain71-100: Likely AI

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Why Multi-Engine Detection?

Single AI detectors disagree on 15-30% of texts. OmniDetect combines three independent engines for consensus — dramatically reducing false positives.

3 Independent Engines

Your text goes to the engine measured most accurate for its language, and the reasons behind the verdict come with it.

Consensus-Based Scoring

And when the reading is not confident enough to stand behind, we say so instead of printing a number.

Your text, your call

Your document stays in your history until you delete it, and you can delete it at any time. We do not sell it. GDPR compliant.

Frequently Asked Questions

Can AI detectors detect GPT-4?
Yes. While GPT-4 produces more sophisticated text than earlier models, modern detectors are specifically trained on GPT-4 outputs. OmniDetect's engine caught every GPT-4-class sample in our frozen corpus, including four kinds of evasive rewriting. Detection rate on AI text.
What is the difference between GPT-3.5 and GPT-4 detection?
GPT-4 text is generally harder for single detectors because it's more natural. gemeten engine-routering is particularly valuable for GPT-4 — if one engine is uncertain, the other two provide additional signal.
Does OmniDetect detect GPT-4o and GPT-4 Turbo?
Yes. Our engines are continuously updated to handle the latest model versions. The measured approach ensures that even as models improve, the consensus method maintains high accuracy.
How accurate is GPT-4 detection?
On our frozen English corpus the production engine misjudges 5.2% of academic human writing and 1.0% of personal writing, and catches 100% of the machine-written samples. Individual engines range from 88-94% TPR, but consensus outperforms all of them.

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