Multi-Engine AI Detection
Detect GPT-4 Writing — Free Multi-Engine Scanner
GPT-4 produces sophisticated text. One detector might miss it. Three working together give you certainty.
Free scan: GPTZero analyzes your first ~300 characters
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|||.pdf, .docx, .txt
0-30: Likely Human31-70: Uncertain71-100: Likely AI
Your text is never stored. Only a SHA-256 hash for caching.
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
GPTZero, Winston AI, and Originality.ai each analyze your text independently.
Consensus-Based Scoring
When all three engines agree, you can trust the result.
Privacy First
Your text is never stored. Only a SHA-256 hash for caching. 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 3-engine consensus achieves 96.1% 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. Multi-engine consensus 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 3-engine approach ensures that even as models improve, the consensus method maintains high accuracy.
How accurate is GPT-4 detection?
In our 211-sample benchmark, multi-engine consensus achieved 94.2% overall accuracy with only 2.5% false positive rate. Individual engines range from 88-94% TPR, but consensus outperforms all of them.
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