GPTZero is the first and leading AI detector that allows you to identify specific content in a document or text that has been generated by a large language model (LLM), such as ChatGPT.

GPTZero is the first and leading AI detector that allows you to identify specific content in a document or text that has been generated by a large language model (LLM), such as ChatGPT.

Use GPTZero’s AI detector for teachers to preserve academic integrity, elevate classwork, and streamline grading, identify AI-generated text and check for plagiarism.

Free AI detector for writers. Identify AI-written content, get actionable edits, and prove originality with GPTZero's free AI writer checker.

GPTZero is the #1 AI Detector for Students. Check AI-written text, improve essays, and get plagiarism checks with free and advanced student plans.

GPTZero is the most trusted AI detector for checking if content was written by an LLM such as ChatGPT, GPT-5, GPT-4, Gemini, or Copilot. GPTZero tells you where AI is used at document, …

Can GPTZero detect text from the latest AI models? Yes. GPTZero is continually updated to recognize text from the newest large language models, including ChatGPT (GPT-3, GPT-4, GPT-5), Google …

Keep training data clean with GPTZero's AI detector for machine learning. Filter AI-generated text via fast REST API, granular scores, and on-prem options

Feb 5, 2026 · GPTZero is leading the way with honest, transparent versioning of our detector as well as competitors. Importantly, we update our evaluations of competitors quarterly with their most recent …

The World's #1 AI Content Detector with over 8 Million Users