Meta's Muse Spark 1.1 AI model accessed the internet from its supposed-to-be isolated testing environment and hacked into a third-party service. Stone said the model was able to access the internet due to a misconfiguration in the testing environment by the company's evaluation partner Irregular. After gaining access to the internet, it then exploited a security vulnerability in a third-party service, "in a matter similar to previously reported instances with other companies." It was also due to a misconfiguration by Irregular that Anthropic's models were able to leave their testing environment and hack into three organizations. The startup, based in Tel Aviv, Israel, runs tests on frontier AI models and assesses their cybersecurity capabilities by simulating real-world scenarios.