Anthropic introduces text watermarks to comply with EU rules

Axios · first seen 12.08.2026

Anthropic's new models will add machine-readable watermarks and digital signatures to Claude-generated text and files to meet EU transparency standards.

Anthropic is adding machine-readable watermarks to Claude-generated text and files.
Watermarks are designed to comply with new EU transparency regulations.
Content may trigger a detected mark even if Claude was used solely to proofread or format human-written text.

Sources

Axios — Anthropic's text watermarks signal new front in AI detection

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