ZeroGPT Detector is built around a single, simple workflow: you give it text and it tells you how AI-like that text reads. Behind that simplicity sits a detection pipeline that tokenizes the input, measures statistical signals such as perplexity and burstiness, and produces an aggregate 'AI probability' percentage. Most interfaces of this kind also mark the individual sentences that pushed the score up, so a reviewer can see exactly which passages triggered the flag rather than trusting a single number.
The tool is aimed at people who need a quick authenticity signal rather than a forensic report. Educators checking student submissions, editors screening freelance drafts, marketers auditing outsourced copy and recruiters reviewing AI-assisted applications are the typical audience. Because detectors work on probabilities, results should be treated as one input among several: a low score does not prove human authorship, and a high score does not by itself prove misconduct.
The site is an independent, third-party service. It is not produced, endorsed or operated by OpenAI, and any mention of GPT or ChatGPT elsewhere simply refers to the kinds of models these detectors try to recognize. For current plans, usage limits and word-count caps, always check the live site, since detector pricing changes frequently.
