GPTZero
AI content detection platform that identifies text generated by ChatGPT, Claude, Gemini, and other large language models.
About
GPTZero scans documents and highlights passages likely written by AI, providing sentence-level probability analysis alongside an overall authenticity score. Beyond detection it includes a hallucination checker that flags fabricated citations, a plagiarism checker, and basic writing feedback tools. The platform integrates with Google Docs and offers a Chrome extension for in-browser checks. It is widely used in education, publishing, and hiring, and supports both individual scans and team workflows. A free tier covers up to 10,000 characters per scan; paid plans unlock higher limits, batch scanning, and organizational reporting.