Anthropic reportedly extends Claude's text watermark to Opus 4.7, Opus 4.6, Sonnet 4.6 and Mythos 5 from 3 November
MACCUS reports an Anthropic email to API customers, made public as a screenshot on 28 October, says the same watermark newer models carry will apply to the four models, with Bedrock taking a few extra days; Anthropic's help page did not yet show the date.