What is GPTZero?

GPTZero is the leading AI detector for checking whether a document was written by a large language model, such as ChatGPT or Claude. GPTZero detects AI at the sentence, paragraph, and document level. We trained our model on a large, diverse corpus of human-written and AI-generated text, focusing on English prose. To date, GPTZero has served over 20 million users worldwide and works with over 100 organizations in education, hiring, publishing, legal, and more.