GPTzero

GPTzero helps you check whether a document or text may have been generated by large language models (LLMs) such as ChatGPT, GPT-4/5, Gemini, Claude, Llama, and more. It delivers an AI-detection score and highlights phrases that appear most likely to be AI-generated, with analysis available at sentence, paragraph, and document levels.

Beyond detection, GPTzero is built for verification and writing quality review. Features like Writing Replay provide video proof of the writing process so you can observe how the document was created, alongside tools for writing reports, writing feedback, and an AI Tutor for custom writing feedback.

For educators and organizations, GPTzero supports classroom workflows and integrates directly into tools you use daily. It offers integrations with Chrome, Google Docs, Classroom, Canvas, Zapier, and an API, and includes features like an AI grader and a plagiarism checker to help assess originality and writing consistency.

What does GPTzero scan for?

GPTzero analyzes text to estimate whether it was generated by AI models and highlights phrases that appear most likely to be AI-generated.

Can GPTzero analyze uploaded documents or only pasted text?

You can paste text or upload files, including uploads from Google Drive. For scans over 10,000 characters, you’ll need a free account first.

Does GPTzero support checking mixed writing (human + AI)?

Yes. GPTzero can detect and classify documents that contain a mix of human and AI writing, not just fully AI-generated text.

Which AI models can GPTzero detect?

GPTzero classifies AI content from major model families including Claude, ChatGPT, GPT-4/5, Gemini, Llama, and others, with results based on its multi-component detection approach.

How can I verify real writing rather than just a detection score?

Use Writing Replay for video proof of the writing process and human writing verification, plus review the writing report for detailed insights.

What integrations are available for classrooms and daily workflows?

GPTzero integrates with Chrome and Google Docs, plus classroom tools like Classroom and Canvas. It also connects via Zapier and provides an API.