From Theory to Deployment

The previous article in this series covered the mathematics of LLM watermarking. Green-red lists, spike entropy, z-tests, and the elegant distortion-free Gumbel approach. That was theory. This article covers what is actually happening right now, in August 2026, as third party watermark detection moves from research papers into deployed products with real regulatory teeth behind them.

The timing matters enormously. The EU AI Act’s Article 50 requires AI outputs to be detectable as artificially generated. Enforcement began this month. That single regulatory deadline has forced every major lab to answer a question they had avoided for years. Should outsiders be allowed to check whether text came from their model?