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Multi-Engine AI Detection

Detect ChatGPT Writing — Free Multi-Engine AI Checker

Worried your text sounds like ChatGPT? Three independent engines give you certainty, not a guess.

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

Free scan: GPTZero analyzes your first ~300 characters

0 / 10,000
|||.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.

Can AI Detectors Detect Claude?

Claude (by Anthropic) produces some of the most natural-sounding AI text on the market. Its Constitutional AI training makes Claude outputs particularly challenging for single-engine detectors — our benchmark shows individual engines miss Claude text 10-15% more often than ChatGPT text.

This is exactly where multi-engine consensus shines. While one detector might miss Claude's writing style, the combined analysis of GPTZero, Winston AI, and Originality.ai catches patterns that no single engine sees alone. Our 3-engine consensus maintains a 94.2% detection rate across all major LLMs including Claude 3.5, ChatGPT (GPT-4o), and Gemini.

Whether your text was written by ChatGPT, Claude, or any other AI model — OmniDetect gives you certainty, not a guess.

Frequently Asked Questions

Can OmniDetect detect ChatGPT writing?
Yes. OmniDetect uses three independent engines (GPTZero, Winston AI, Originality.ai) to analyze text. Our multi-engine consensus achieves a 96.1% true positive rate on ChatGPT and other LLM outputs.
Is ChatGPT detection accurate?
Single-engine detectors often disagree on ChatGPT text. OmniDetect's 3-engine consensus reduces false positives from ~18% (single engine) to just 2.5%, verified on 211 independent samples.
Can ChatGPT-4o evade detection?
GPT-4o produces more natural text than earlier versions, but multi-engine consensus still catches the majority. Our benchmark shows 96.1% detection rate across all modern LLMs including GPT-4o.
How many words can I check for free?
You can scan the first ~300 characters for free with real GPTZero analysis, 3 times per day. Sign up for 1,000 free Word Tokens to unlock all three engines on the full text.

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