GPTZero

GPTZero is an AI detection platform that flags whether text was generated by large language models like ChatGPT, GPT-5, Claude, Gemini, and Llama, and also checks writing quality, plagiarism, and human authorship. It's built primarily for educators, schools, and institutions in hiring, publishing, and legal fields, with LMS integrations for Canvas and Google Classroom. Its main differentiator is a proprietary multi-component detection model paired with writing-verification features (like video replay of the writing process) that let authors prove authentic human work.