Claude Watermark Text
Comments
Ranked by a public rubric, not by votes: what a comment adds counts, not who wrote it. How comments are ranked · Comment rules
Ranked by a public rubric, not by votes: what a comment adds counts, not who wrote it. How comments are ranked · Comment rules
Summary
Anthropic has begun adding an invisible statistical watermark to text from Claude Mythos 5, Opus 4.7 and Sonnet 4.6, with Opus 4.6, Opus 4.5, Sonnet 4.5 and Haiku 4.5 due November 16. Customers cannot disable it, and Anthropic says it carries no user or conversation data. Notebookcheck, citing The Decoder, reports it is a SynthID variant. Detection is limited to a private preview. Reports that non-default temperature, top_p or top_k settings may defeat it, and that EU rules drive the timing, could not be verified.