Claude now watermarks text from older models, with no opt-out
Anthropic has been adding an invisible watermark to text from Claude Mythos 5, Opus 4.7 and Sonnet 4.6 since November 3. Opus 4.6, Opus 4.5, Sonnet 4.5 and Haiku 4.5 are set to follow on November 16. Customers cannot turn the mark off. Here is what it…
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