Claude Marks Edited Text Too

San FranciscoAnthropic will watermark text Claude only edits, not just writes.

A human draft that Claude merely polishes could now be flagged as AI-written.

The mark biases word choice in a pattern only Anthropic can detect, but paraphrasing erases it.

The EU AI Act requires the marks, but Anthropic has not said when detection tools launch.

Sources: Ars Technica