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The Verge

October 5, 2026

OpenAI is adding text watermarking in ChatGPT and Codex

By AI Tool Hub Analyst

"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 approaches like Google DeepMind's SynthID for text, which is also the basis for the watermarking Anthropic announced in August. Like OpenAI, Anthropic made the move to meet the requirements of the EU's AI Act; however, not everyone was happy to learn about the addition. OpenAI also inclu"

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Original Source

This analysis is based on reporting originally published by The Verge.

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OpenAI is adding text watermarking in ChatGPT and Codex | AI Tool Hub