Sylwia Lask's post on Claude's watermark is the best-natured thing I have read on this topic in a...

Anthropic's new invisible watermarks on Claude's outputs, introduced to comply with the EU AI Act, have sparked frustration among users relying on it for work and studies.

The Claude watermark flags text the model only proofread, which the EU AI Act exempts. Meanwhile a fully AI-written article can publish unlabelled.