Everyone is freaking out about AI watermarking as if this suddenly makes AI-generated writing detectable. It already is. AI detectors are probabilistic because the models themselves generate language probabilistically.
Watermarking changes the question from “Was AI involved?” to “Which model produced this?”
Also: Academic publishing already requires disclosure of AI tools. If you’re actually using AI seriously for research and writing, the lesson has been obvious for a while: use it, verify it, disclose it.
The people who should be worried about watermarking aren’t people using AI. They’re people pretending they aren’t.
Anthropic says new Claude models will embed invisible watermarks in all generated text, everywhere Claude is offered.
The watermark is part of the text, it isn't metadata: "it will travel with the text when it's copied and pasted elsewhere, and may persist through some editing."
This starts with models launched on or after August 2, 2026, under an EU AI Act code Anthropic signed. Anthropic is still working on adding it to current models. The rollout is worldwide.