Anthropic Claude Watermark: Silent Bypass on Opus 4.6 and Sonnet 4.6 Production Calls

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Anthropic Claude watermark bypass confirmed: On Claude Opus 4.6 and Sonnet 4.6, changing temperature, top_p, or top_k silently disables SynthID text marking. Developers using non-default API settings will produce unwatermarked output after the November 3 rollout — 31 days before EU AI Act Article 50 enforcement begins December 2. — Tech Times

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