Anthropic has pledged to start marking Claude-generated text and images with machine-readable data, in an effort to comply with European rules for AI transparency. “Generated text will carry embedded watermarks, and generated files will include digitally signed provenance metadata where supported,” Anthropic says on a new Claude support page. The changes are invisible to human eyes, but will make it easier for people and online platforms to detect if content was generated by Claude models. The machine-readable marks will be applied globally to supported Claude models, including Claude Platform (API), Claude, Claude Code, Claude Cowork, and Claude Tag. According to Anthropic, an “imperceptible watermark” is woven directly into the text generated by Claude models without changing the meaning, quality, or readability of the chatbot’s response.