Anthropic details how Claude’s invisible text watermarks will work

Anthropic explains how Claude’s invisible text watermarks will work

Anthropic explained how Claude will embed invisible watermarks into generated text. It uses a version of Google's open-source SynthID-Text, which tweaks token selection during output without hurting quality. A paired detector can check if text came from Claude. No launch date yet—Anthropic says it will run safety evaluations first. Worth noting: watermarks won't survive screenshots or paraphrasing; this is mainly a provenance tool for platforms.

Why it matters: Anthropic's first public disclosure of Claude's text watermarking plan, with clear technical details and honest limitations. But no launch date or detection accuracy numbers, so it sits at the lower edge of featured.