Detect AI text from major models

GPTZero classifies AI-generated content from ChatGPT, GPT-4, Gemini, Claude, Llama, and more. The detector uses a multi-step model with 7 components to maximize accuracy and minimize false positives.

Identify AI-written text across a wide range of models with high precision.

Catch AI hallucinations

GPTZero includes a dedicated hallucination detector that flags potentially fabricated or inaccurate statements in AI-generated text, helping you verify factual reliability.

Spot false or unsupported claims in AI output before they spread.

Video proof of the writing process

With GPTZero in Google Docs, you can watch documents being written, view copy-and-paste events, and check for unnatural typing patterns. This provides visual evidence of authorship.

Verify human authorship with a video replay of the writing process.

Ensure originality and proper attribution

GPTZero includes a plagiarism checker that detects if content was copied from outside sources without attribution, helping maintain academic and professional integrity.

Detect copied content and confirm originality in submitted work.

Build responsible writing habits

GPTZero offers an AI Tutor that provides custom AI-powered writing feedback, helping users improve their writing skills while learning to use AI responsibly.

Receive personalized feedback to strengthen writing quality and ethical AI use.

Works where you already write

GPTZero integrates directly with Chrome, Google Docs, Google Classroom, Canvas, and Zapier, plus offers a powerful API for developers. This brings AI detection into your daily workflow.

Use AI detection seamlessly inside your existing tools and platforms.

• High Accuracy and User TrustGPTZero claims 99% accuracy and is trusted by 17 million users and 1 million educators. Independent benchmarking shows its Advanced Scan has best-in-class accuracy, and it is an official AI detector partner of the American Federation of Teachers.
• Comprehensive AI Model CoverageGPTZero detects AI content from major models including ChatGPT, GPT-5, Gemini, Claude, and Llama. Its detection model contains 7 components that process text to determine AI authorship, with a focus on minimizing false positives.
• Wide Range of IntegrationsGPTZero integrates with Chrome, Google Docs, Classroom, Canvas, Zapier, and offers an API. It also provides a Chrome extension for automatic AI detection on Gmail, Google Docs, Classroom, and social media.
• Additional Writing and Plagiarism ToolsBeyond AI detection, GPTZero offers a hallucination detector, plagiarism checker, writing reports with video replay, and an AI writing tutor. These features help verify human writing and improve writing quality.

• Accuracy Claims Require ContextWhile GPTZero claims 99% accuracy and best-in-class performance, this is based on its own statements and independent benchmarking. Users should verify these claims with their own testing, as AI detection accuracy can vary by text type and model.
• Pricing Details Not Fully ShownThe pricing page shows a Professional Plan with annual and monthly billing, but specific prices are not displayed in the scraped content. The page mentions 'Save 45%' on annual plans and 'Seats $0/mo' but actual costs are not provided.
• Limited Information on Enterprise PlansEnterprise and Team plans are mentioned, with features like shared team credits and unified billing, but no pricing or detailed terms are given. Contact sales is required for more information.
• User Reviews and Testimonials Are SubjectiveThe website includes positive reviews from customers and media, but these are individual experiences and may not represent all users. Some reviews mention high accuracy, but results can vary depending on the content and use case.

For Educators

GPTZero is built for teachers and professors, with features like Advanced AI Scan, sentence-level AI highlighting, and integration with Canvas and Google Classroom. It helps verify authentic student writing and detect AI-generated content from ChatGPT, Claude, and Gemini.

For Students

Students can use GPTZero to check their own work for unintentional AI patterns, access writing feedback, and generate citations. The Writing Replay feature provides video proof of the writing process to demonstrate originality.

For Hiring and Recruiting

GPTZero works with organizations in hiring and recruiting to screen applications and verify that submitted materials are human-written. Its high accuracy and plagiarism checker help maintain integrity in candidate evaluation.

For Publishers and Legal Professionals

GPTZero is trusted by 100+ organizations in publishing and legal fields. It offers batch file scanning, page-by-page review, and enterprise-grade security, making it suitable for verifying content authenticity at scale.

Visit gptzero.me and create a free account using your email address.

Paste or upload the text you want to scan — up to 5,000 characters on the free plan.

Click 'Scan' and wait 5-15 seconds for the analysis to complete.

Review the report, which shows the overall AI probability score and highlighted passages flagged as AI-generated.