Read our Privacy noticeClaude will now start leaving invisible markers to show that a text has been generated with AI, its maker Anthropic has said. In keeping with AI rules, those invisible watermarks will be placed onto both text and images. "Detecting a Claude mark tells you that the content may have been processed by Claude," it said, noting that a mark "does not, on its own, confirm the full provenance of the content. It also noted that the lack of such a watermark does not necessarily mean that the text was not generated or processed using AI. But similar technology tends to work either by using specific, invisible characters or choosing specific words more than others – and it is thought that Claude is using the latter.