Anthropic published a detailed account on August 14, 2026 of how the text watermark in future Claude models works, identifying it as a version of the SynthID-Text technique Google DeepMind published in a peer-reviewed 2024 Nature paper. The company framed the technical explainer around the compliance obligation behind the change: as of August 2, 2026, the EU AI Act requires providers serving the European market to mark AI-generated content, and Anthropic signed the bloc’s transparency code in…