Anthropic announced this week that it will start adding machine-readable watermarks to content generated by its chatbot Claude, including invisible marks embedded directly into AI-generated text. Anthropic says the marks will apply to supported models across “Claude Platform (API), Claude, Claude Code, Claude Cowork, and Claude Tag, and wherever Claude is offered, worldwide.” When it comes to text, Claude will hide a machine-detectable pattern directly in the words it generates. “When a supported Claude model generates text, it weaves an imperceptible watermark directly into the text itself. Because people also use Claude to proofread, translate, summarize, or otherwise edit their own writing, text that originated somewhere else could still carry a Claude watermark.