OpenAI is adding text watermarking in ChatGPT and Codex - The Verge

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1. OpenAI is adding text watermarking in ChatGPT and Codex

   An invisible, machine-readable watermark in text output is rolling out to ChatGPT and Codex, but only for users in the European Union at first. OpenAI says its textGrain watermarking "matched or exceeded" other...

   The Verge AI · October 05, 2026 18:08
2. OpenAI is adding text watermarking in ChatGPT and Codex

   An invisible, machine-readable watermark in text output is rolling out to ChatGPT and Codex, but only for users in the European Union at first. OpenAI says its textGrain watermarking "matched or exceeded" other...

   The Verge General AI Filter · October 05, 2026 18:08