OpenAI to watermark AI-generated text in EU

What happened

OpenAI is rolling out text watermarking in the EU in its latest attempt to comply with the region’s AI laws after the bloc said it will regulate ChatGPT under its strictest rules for online platforms. AI watermarking is an unreliable technology with ‘significant limitations’, OpenAI said. OpenAI is an artificial intelligence company based in San Francisco, and its products and services include ChatGPT.

MACHINES OpenAI to watermark AI-generated text in EU by Suhasini Srinivasaragavan 6 Oct 2026 Save article Image: © IB Photography/Stock.adobe.com AI watermarking is an unreliable technology with ‘significant limitations’, OpenAI said. The company said that it will add an invisible watermark over the coming weeks to text generated from ChatGPT and Codex in the region.

API (the interface one piece of software uses to talk to another) customers globally will also be allowed to opt in to text watermarking for select models, while select researchers and experts will get access to test out the watermark detector. The new feature comes after transparency rules under the EU AI Act (the EU law setting rules for AI systems by their risk) came into force this August which require certain AI systems to tell users when they are interacting with AI and how the content they are consuming is generated or altered by it.