The move is likely to do little to tackle the rise of ‘AI slop’ in academia, say researchers.

This move is part of the company's effort to comply with the EU regulation and transparency requirements for AI.

Anthropic will embed machine-readable watermarks in all Claude model text outputs starting August 2, 2026, complying with the EU AI Act globally.

EU rules cited as reason for effort to trace AI output ancestry

Anthropic said new Claude models will embed an "imperceptible watermark" directly into AI-generated text.

The EU’s AI rules are having an impact.

Anthropic has complied with Europe's rules.