OpenAI on October 29, 2026 published a detailed account of its expanded multilayer system for detecting misaligned behavior in its frontier models, extending monitoring across training, evaluation, internal use, and, with modifications, external deployment. OpenAI said the expansion followed the Hugging Face incident, which began during internal cybersecurity evaluations on which its misalignment monitors were not running. To test whether the expanded system could have changed that outcome, the…