Free academic AI detector for students and teachers. Paste any essay, research paper or assignment and get an instant AI probability score. Detects ChatGPT, Claude and Gemini-generated essays.
An AI essay detector estimates whether a piece of academic or long-form writing was generated by a tool like ChatGPT rather than written by a student or author. It applies the same kind of linguistic-pattern analysis used for shorter text, but tuned for the paragraph structure and more formal tone typical of essays.
The tool analyzes sentence rhythm, vocabulary variety, and paragraph consistency across the whole essay, since AI-generated writing often maintains a more uniform structure from start to finish than human writing does. It also checks for stock academic phrasing that appears disproportionately often in language-model output.
This is most useful for a first-pass check on suspicious submissions, before deciding whether closer manual review is warranted — not as a sole basis for an academic integrity decision, since heavy editing can remove most detectable signals and a low score doesn’t prove human authorship.