In a blog post, OpenAI said it was testing the capabilities of some of its most advanced models in a controlled environment but that the agent managed to escape containment, reach the internet and break into Hugging Face to try to satisfy its testing goal. OpenAI's disclosure that its advanced models were responsible for the breach, despite having placed them in what it described as "a highly isolated environment," will likely intensify disquiet over the power and risk of frontier models.