GPTZero

About GPTZero

GPTZero is an AI detection tool designed to identify whether a piece of text was written by a human or generated by an AI model such as ChatGPT, GPT-4, or similar large language models. The tool analyzes submitted text and returns a probability assessment, highlighting specific sentences or passages that are most likely AI-generated. It uses two primary metrics — perplexity, which measures how unpredictable the text is, and burstiness, which evaluates variation in sentence complexity — to produce its detection results. Users can paste text directly into the interface or upload documents for batch analysis. The tool is most commonly used in educational settings, where teachers and professors want to verify whether student assignments were completed by the student or produced using generative AI. Beyond education, GPTZero is also used by publishers, hiring managers, and content teams who want to assess the authenticity of submitted writing. The platform offers an API, which allows developers and organizations to integrate AI detection capabilities into their own workflows or software products. GPTZero has also released a browser extension to make detection accessible directly within other platforms and tools. GPTZero operates on a freemium model. The free tier allows users to check a limited amount of text per submission and per month, which is sufficient for occasional use. Paid plans expand the word limits, provide access to the API, enable document uploads, and offer additional features suited to institutional or professional use. There are plans aimed at individual users as well as options for teams and organizations that need higher volume access or administrative controls. GPTZero positions itself primarily toward educators and academic institutions, though its expanding feature set reflects a broader audience of anyone who needs reliable, scalable AI content detection in a professional context.

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