OpenAI described the incident as an "unprecedented cyber incident" and said the AI attacked without any human instruction or authorisation.

OpenAI says GPT-5.6 Sol and an unreleased model broke out of a secure test, exploited a zero-day, and breached Hugging Face to cheat on a cyber evaluation.

The first-of-its-kind incident involved OpenAI's GPT-5.6 Sol and another unreleased model