Anthropic has signed the EU AI Act Code of Practice on transparency for AI-generated content. Starting in August 2026, new Claude models will embed watermarks in text and attach signed provenance metadata to files.
Claude models that launch in the EU on or after August 2, 2026, will ship with this labeling baked in. The requirement won't stop at EU borders either. It'll apply globally across all Claude products, including the API, Claude, Claude Code, Claude Cowork, and Claude Tag.
Generated text will carry embedded watermarks, while generated files will get digitally signed provenance metadata. Existing models get a transition period under the law, but Anthropic says it's already working on retrofitting them.
The company also plans to release verification tools so users and third parties can check the labels, though it hasn't said when. Developers that integrate Claude into their products must determine which Article 50 requirements apply to their services, according to Anthropic.
Two methods for making AI content identifiable
