AI Detector - Free AI Checker for ChatGPT, GPT-6 & Gemini

Quick Verdict

GPTZero is an AI detector that checks whether text appears to have been written by large language models such as ChatGPT, GPT-4, GPT-5, GPT-6, Gemini, or Copilot. Someone evaluating student or other submitted writing may care because the website describes it as a free checker with options for monthly and annual plans, but important details about accuracy, privacy, and data handling require verification.

The project appears designed to support closer review rather than replace human judgment. Its public materials describe classification of AI-generated text and identify teachers and students as target users. The website also states that it is used in more than 100 countries and trusted by over 10 million teachers and students, although readers should verify how those figures are defined.

Key Features

• Checks whether content was written by several named LLMs, including ChatGPT, GPT-4, GPT-5, GPT-6, Gemini, and Copilot.
• Classifies text as AI-generated according to the website’s description.
• Offers a free starting option.
• Provides monthly and annual billing, with annual billing advertised as saving 45%.
• Positions educators as an explicitly addressed audience and describes the product as an AI detector for reviewing submitted content.

The available public information does not clearly state the detector’s accuracy methodology, false-positive rate, false-negative rate, supported input formats, usage limits, or integrations. Privacy, retention, and content-handling practices are also not clearly stated. Those omissions matter if the tool will be used with student work, confidential documents, or decisions that affect people.

Who this is for

GPTZero appears best suited to teachers, students, and organizations looking for an initial check on whether text may have been produced by an LLM. It may be useful as one input in a broader review process, but the available information does not establish that its classification should be treated as conclusive.

Before adopting it, verify current plan prices, limits, supported workflows, privacy terms, data retention, enterprise pricing, and the evidence behind its accuracy claims on the official website. Also confirm whether the tool fits your institution’s policies before submitting student or sensitive content.