Anthropic’s Watermark Expansion Leaves Bypass Loophole in Two Older Claude Models
Original headline: Anthropic's watermark rollout leaves a loophole on two older Claude models
Anthropic expanded its text watermark to four additional Claude models to meet the EU AI Act deadline. However, on the older Claude Opus 4.6 and Sonnet 4.6 models, developers can bypass the watermark by tweaking a single sampling parameter. Anthropic’s response was limited to a compliance warning.
The bypass loophole threatens the effectiveness of AI transparency safeguards required by regulation.
Research angleHow does the ability to bypass AI watermarks affect user trust, examined through the Technology Acceptance Model (TAM)?