DrLambda vs GPTZero

Paste text or upload a document and get an overall AI probability score plus a sentence-by-sentence breakdown of which parts look machine-written.

Flags AI text from major model families including ChatGPT, Gemini, Claude, Llama, and others, rather than training for a single model.

A Chrome extension and Google Docs add-on bring scanning into Gmail, Docs, Classroom, and other surfaces you already work in.

Checks content for copied passages from outside sources so you can separate AI-generation questions from originality questions.