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Anthropic s watermark rollout leaves a loophole on two older Claude models

The Decoder ·

Summary: Anthropic is expanding its text watermark to four more Claude models to meet the EU AI Act's December deadline. On the older models Claude Opus 4.6 and Sonnet 4.6, developers can bypass the watermark by tweaking a single sampling parameter. Anthropic addresses the loophole with j

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This is a summary of a story first published by The Decoder on 1 Nov 2026. Read the full article at the source link.

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