Anthropic Watermarks All Claude Outputs Globally Under EU AI Act Rules

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Anthropic has begun embedding watermarks into all text generated by Claude models launched from 2 August 2026, in compliance with the EU AI Regulation's Code of Practice on Transparency of AI-Generated Content. The watermarking applies globally across all Claude products and platforms — including the API, Claude apps, AWS Bedrock, Google Cloud, and Microsoft Foundry — with no documented opt-out. For image files, Anthropic uses the open C2PA metadata standard, while the text watermark is described as embedded within the content itself and capable of surviving copying and some editing. Anthropic has not yet published technical documentation or detection tools, and has not disclosed the exact mechanism used. Researchers have separately demonstrated that AI watermarks can be forged or stripped, highlighting that watermarking what AI produces is only half the challenge — proving what content AI consumed during training remains unsolved.

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