OpenAI starts phased textGrain watermarking access
OpenAI introduced textGrain, a statistical watermark embedded during generation. Select API customers can opt in globally now, while ChatGPT and Codex rollout in the EU is planned over coming weeks. Approved researchers can apply for detector access.
Why it matters: A generation-time signal gives platforms another way to investigate synthetic text without requiring visible labels, but its value depends on false-positive controls, editing resilience and detector governance.