OpenAI Ships textGrain to Invisibly Watermark AI Text for EU Compliance

OpenAI is rolling out textGrain, an invisible statistical watermark for ChatGPT and Codex output in the EU, with opt-in API access worldwide.

Source

OpenAI

Published

Oct 5, 2026, 5:42 PM

Author

AlphaSignal Newsroom

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1 min read

OpenAI is rolling out textGrain, an invisible statistical watermark for ChatGPT and Codex output in the EU, with opt-in API access worldwide.

Reporting is indexed from AlphaSignal. Rights remain with the original publisher and cited sources.

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