ChatGPT marcará sus textos con una señal invisible en la UE: qué es textGrain y por qué no sirve para acusar a nadie
wwwhatsnew.com/2026/10/10/textgrain-marca-agua-invisible-chatgpt-union-europea-ai-act-2026/
Our approach to EU text provenance rules | OpenAI
openai.com/index/eu-text-provenance/
textGrain: Entropy-Calibrated Watermarking
for Language Model Text
Technical report accompanying OpenAI’s October 5th blog post
cdn.openai.com/pdf/e9508624-d767-41b6-a26d-e34ca798ada6/textgrain-entropy-calibrated-watermarking-for-language-model-text.pdf