GPTZero identifies likely AI-generated writing and marks potential AI use at document, sentence, and word level. Its detector can label text as human, AI, or mixed, with confidence scores, explanations, AI vocabulary, and sentence-level highlights. Advanced Scan points to passages that contribute most to an AI classification. Users can paste text or submit DOCX, PDF, and image files; the technology page says it can analyze up to 50 files at a time. GPTZero lists English, German, Portuguese, French, and Spanish support, and names ChatGPT, GPT-3 through GPT-6, Gemini, Claude, and Copilot among covered models. Other tools include Writing Replay, plagiarism checking, writing feedback, and grammar checking. A Chrome extension scans webpages and Google Docs, and integrations include Google Classroom, Canvas, an API, and Zapier. The Free plan is 0.00 USD per free; Essential is 8.33 USD per month when billed annually. GPTZero cautions that results can be wrong, perform better on longer English prose, and should not be used alone for consequential judgments.
Who it is for
GPTZero may suit educators, hiring teams, publishers, journalists, and others assessing writing authenticity. Its own guidance cautions against treating a detection result as a final verdict or using it alone to punish students.
What is good
- Highlights AI use at document, sentence, and word level
- Free plan supports AI detection
- Offers Google Classroom and Canvas integrations
- API supports batch inference
What to know first
- Results can be wrong
- Performs better on longer English prose
- Dashboard inputs may be used in aggregate to improve service
Verdict
GPTZero combines AI-writing detection with writing and classroom tools, and offers web, extension, and API access. Its stated accuracy limits mean results should inform, not decide, consequential judgments.
GPTZero plans and pricing
All plansCompared on AI content detection software
- Free plan
- Yes
- API access
- Yes
- Browser extension
- Yes
- Batch scanning
- Yes
