textGrain WATCH

textGrain has entered API opt-in and phased EU product rollout, but short text, rewriting attacks and a restricted detector limit independent validation.

Next stepWait for detector access, then test short text, synonym edits and false positives on domain samples before adopting provenance checks.

Judgment reviewed 2026-10-06 · Basis: OpenAI launches opt-in textGrain watermarking for API output