Gpt Zero
Free AI detector for writers.
At a glance
Starts at
Free, Upgrade to Premium $19/month
Price as published by the vendor, September 2026.
Free tier
Yes, limited
Platforms
Web
Best for
Writers, educators, content creators
Not for
Content creators on tight budgets
4.0 out of 5
Scored by a Toolio reviewer after real useOur verdict
GPTZero is highly accurate and useful for detecting AI-generated text. It's best suited for writers and educators who need reliable detection tools but may struggle with its higher price point or lack of some advanced features found in premium plans.
✓What it does well
High accuracy99.9% accurate in classifying AI vs human text.
Wide model supportDetects from ChatGPT to Gemini and Llama.
Detailed insightsProvides sentence-by-sentence detection and advanced report analysis.
✕Where it falls short
Free plan limitationsLimited features in the free version.
Higher costPremium plans can be expensive for some users.
No video replay in basic modeBasic plan does not offer video replay and human writing verification.
Key features
Plagiarism detectionCan scan text to check for plagiarism, but as a separate feature.
AI tutor toolOffers AI-powered feedback on writing habits and skills.
API accessProvides an API with code available in multiple languages for integration.
Video ReplayProvides video proof of writing process.