OpenAI Is Adding Invisible Watermarks to ChatGPT Text in Europe
OpenAI has started adding invisible textGrain watermarks to ChatGPT and Codex output — first for API customers worldwide (opt-in), then automatically for users in the EU under the AI Act’s transparency rules. Sources: The Verge; TechCrunch; Moneycontrol; Digital Trends, October 5–6, 2026.