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Anthropic Is Watermarking Claude's Text: Here's What Changes for You

If you use Claude, some of what it writes for you now carries a hidden signature. Anthropic has started embedding an invisible watermark in Claude's text — and from Tuesday, November 3, the mark reaches four older models: Claude Mythos 5, Opus 4.7, Opus 4.6, and Sonnet 4.6. The newer models already…

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  1. 2026-11-02 04:02 · DEV Community — AI
    Anthropic Is Watermarking Claude's Text: Here's What Changes for You

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