Anthropic will watermark text generated by its AI models, including Claude, the company has said. Through means that we can only begin to fathom, the watermark will travel with text when users copy and paste it. “When a supported Claude model generates text, it weaves an imperceptible watermark directly into the text itself. Detection checks whether a piece of text or a file carries a supported Claude mark. If a supported mark is found, it indicates that the content may have been processed by Claude.”