textGrain
1 article tagged with textGrain
October 5, 2026
product updateOpenAI
OpenAI to watermark ChatGPT and Codex text in the EU with textGrain; API watermarking is opt-in worldwide
OpenAI will switch on invisible text watermarks called textGrain for ChatGPT and Codex users in the EU over the coming weeks. API watermarking will be opt-in worldwide, unlike Anthropic's mandatory approach for Claude. OpenAI's own data shows detection drops sharply when text is edited.