OpenAI to Add textGrain Watermark by Default to ChatGPT Outputs in EU

OpenAI announced that it will automatically add watermarks to text generated by ChatGPT in the EU, with other regions off by default, in compliance with the EU AI Act effective in August requiring detectable labeling of AI content. The watermark uses the proprietary method textGrain, embedding markers through word-choice patterns imperceptible to the human eye; OpenAI has published a technical paper and will open the detector to a limited number of researchers and institutions, while others can obtain access through an approval process gradually.