Claude text now carries a hidden mark, with older models joining on 16 November
Anthropic adds an invisible statistical mark to the words Claude writes, under its pledge to the EU code of practice.
Why it matters. Text written or edited by Claude may be recognised later, and the mark holds no data about you.
In simple words. Anthropic puts a hidden mark in the text Claude writes, so officials can tell an AI wrote it. The mark holds no information about you.
Watch: a regulatory trend spreading across AI companies.
Your call: hype or real?




















