EQUIPThe Verge · 2h ago
OpenAI is adding text watermarking in ChatGPT and Codex
Executive Brief
The 30-second read
OpenAI is implementing machine-readable text watermarking for ChatGPT and Codex, beginning exclusively with users in the European Union. This initiative aligns with regional compliance requirements and follows similar deployments by competitors like Google and Anthropic.
- 01OpenAI textGrain watermarking provides invisible machine-readable signatures for generated text outputs
- 02Initial rollout targets European Union users to meet AI Act regulatory standards
- 03OpenAI claims textGrain performance matches or exceeds Google DeepMind SynthID technology
- 04Deployment reflects industry-wide adoption of watermarking protocols including recent moves by Anthropic
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Business Travel Management 2026: Program Blueprint →AI-generated summary · Verify at source
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 […]