OpenAI to Add Invisible Watermarks to ChatGPT and Codex Text in Europe
phoneworld.com.pk Oct 6, 2026

OpenAI to Add Invisible Watermarks to ChatGPT and Codex Text in Europe

AI-summarised brief · reviewed before publication

OpenAI will deploy invisible watermarks on ChatGPT and Codex outputs in the European Union, enabling detection of AI‑generated text without altering its appearance. The watermark subtly modifies word choices to create a statistical signature that detection software can later identify. The feature will be added to eligible EU outputs over the coming weeks and is optional for API developers worldwide, remaining disabled by default. OpenAI is also accepting applications for its detection system, initially limited to selected researchers and expert organizations. The company notes that editing or shortening text can reduce detection accuracy.

💡 Why It Matters

  • · The rollout gives regulators a tool to trace AI‑produced content, addressing growing concerns about misinformation and intellectual‑property attribution in the EU.