Fact · Voice and AI
300words
Turnitin raised the minimum length of a document its AI writing detector will evaluate from 150 words to 300 words.
Checked against its source on October 17, 2026
In the source's own words
“increasing the minimum word requirement from 150 to 300 words in order for a document to be evaluated by our AI writing detector”
AI writing detection update from Turnitin's Chief Product Officer, Annie Chechitelli, Turnitin, 2023, Blog post, 23 May 2023.
Open the original- What it measures
- Turnitin said that its accuracy rises with a little more text, and that its goal is to focus on long-form writing.
- What it does not show
- The company says the threshold may change again. Short dictated notes below 300 words are not scored at all.