Anthropic will watermark text from Claude and other models to comply with EU rules

Anthropic says it will watermark text generated by its AI models

Anthropic confirmed it will watermark text and files from its models, including Claude, to meet the EU AI Act's transparency code that took effect August 2. The watermark lives inside the text itself and survives copy-paste. All models released after August 2 get it automatically; older models will follow. File watermarking uses the C2PA open standard. The post doesn't clarify how much editing removes the watermark—Anthropic only says it 'may persist through some editing,' and TechCrunch has asked for details.

Why it matters: Anthropic rolling out invisible text watermarking across all models is a concrete step on AI traceability, not vaporware. All three HKR axes hit: the mechanism is intriguing, there are specific dates and tech choices, and it directly affects practitioners' workflows. The ding ...