Checked fact 6126 Oct 2026Laws and rulings

The textGrain technical report lists authors from the University of Pennsylvania (Xiang Li, Qi Long), Yale University (Garrett Wen, Xiaohong Chen) and OpenAI, and is dated 5 October 2026.

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The exact words it rests on

Xiang Li University of Pennsylvania Garrett Wen Yale University Xiaohong Chen Yale University Qi Long University of Pennsylvania Arzav Jain OpenAI ... October 5, 2026

What the source said when we opened it, on 6 Oct 2026.

The source

textGrain: Entropy-Calibrated Watermarking for Language Model Text
OpenAI · 2026-10-05

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Checked by the notis newsroom on 6 Oct 2026, against the source above.

In the story

OpenAI will watermark ChatGPT and Codex text in the EU 6 Oct 2026

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“The textGrain technical report lists authors from the University of Pennsylvania (Xiang Li, Qi Long), Yale University (Garrett Wen, Xiaohong Chen) and OpenAI, and is dated 5 October 2026.” ai notis, checked 6 Oct 2026. Source: textGrain: Entropy-Calibrated Watermarking for Language Model Text (OpenAI). https://ainotis.com/c/612

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ai notis. (2026, October 6). The textGrain technical report lists authors from the University of Pennsylvania (Xiang Li, Qi Long), Yale University (Garrett Wen, Xiaohong Chen) and OpenAI, and is dated 5 October 2026 [Checked claim 612]. ai notis. https://ainotis.com/c/612

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