Anthropic Adds Invisible Watermarks to Claude AI Text and Images to Meet EU Rules

TLDR

• Anthropic will embed invisible watermarks in all text and files created by Claude AI models worldwide
• The move brings Anthropic into compliance with the EU’s Code of Practice on Transparency of AI-Generated Content
• Watermarks will travel with copied and pasted text and use the C2PA open standard for files
• Users cannot opt out, and the policy applies to Claude, Claude Code, Claude Cowork, and Claude Tag
• Backlash erupted on X and Reddit, with users raising concerns about proofreading, coding output, and AI detection

Anthropic confirmed it will begin watermarking all text and files generated by its Claude AI models. The policy, announced August 11, applies globally and covers all Claude products, with no opt-out option for users.

🚨HUGE: Claude will now invisibly watermark all AI-generated text, making it detectable even after being copied and pasted.

The watermark tagging will apply to all new Claude models, including API outputs, worldwide with no opt-out option. pic.twitter.com/YVQjIulimR

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