Wire report
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 approaches like Google DeepMind's SynthID for text, which is also the basis for the watermarking Anthropic announced in August. Like OpenAI, Anthropic […] 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 included scores from AI benchmar
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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 […] 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 included scores from AI benchmar
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According to The Verge’s source item, 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 approaches like Google DeepMind’s SynthID for text, which is also the basis for the watermarking Anthropic announced in August. Like OpenAI, Anthropic […] 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 included scores from AI benchmar
Context
The development sits in VINI’s Technology file for readers following technology, science, product policy, markets, infrastructure, and the public consequences of innovation. The original report is linked so readers can check the source account, follow later updates, and compare new coverage against the first published record. The source item is dated 2026-10-05T18:08:39+00:00.
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Primary source: OpenAI is adding text watermarking in ChatGPT and Codex via The Verge. VINI cites and links the source; it does not reproduce the publisher’s full article text without rights clearance.
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- OpenAI is adding text watermarking in ChatGPT and CodexThe Verge - 2026-10-05T18:08:39+00:00
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