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.

GPTZero is the most trusted AI detector for education, designed to check if content was written by large language models such as ChatGPT, GPT-5, GPT-4, Gemini, Claud, Perplexity or Copilot.

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.

As pioneers in AI detection, GPTZero incorporates the latest research in detecting ChatGPT, GPT4, Google-Gemini, Llama, and new AI models, and investigating their sources.

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, …

GPTZero offers the most accurate online Plagiarism Checker, powered by AI. Detect copied text and plagiarised sources with precision. Try it for free.

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

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