OpenAI is adding text watermarking in ChatGPT and Codex

OpenAI is introducing an opt-in text watermarking feature for its API customers, starting today. This allows customers to decide how watermarking aligns with their transparency obligations and user experiences. OpenAI is also collaborating with cloud partners to extend watermarking availability to OpenAI model outputs accessed through their services in the coming weeks.

This marks the first time OpenAI has offered opt-in watermarking for API customers, unlike previous internal-only or research-focused watermarking efforts.