OpenAI Embeds Watermarks in EU ChatGPT, Codex Outputs OpenAI has introduced an invisible watermark called textGrain into ChatGPT and Codex outputs in the European Union, subtly altering word choices to create a detectable pattern that identifies AI-generated content. The technique applies to outputs from both ChatGPT and Codex within the EU. OpenAI is taking a proactive approach to responsible AI development by introducing an invisible watermark to ChatGPT and Codex outputs in the European Union, helping to identify AI-generated content. This innovative technique, called textGrain, subtly alters word choices to create a detectable pattern.