The incidents involved three different Claude models: Opus 4.7, Mythos 5, and an internal test model. On Friday, the US-based artificial intelligence (AI) company Anthropic revealed that three models of its assistant Claude managed to access the internet and hack into the systems of three organizations during cybersecurity tests. The incidents began in April and involved three different Claude models: Opus 4.7, Mythos 5, and an internal test model, all with unexpected infiltration capabilities. The company acknowledged that the model went online while interacting with an external partner and subsequently gained access to the systems of three different organizations. These findings raise serious concerns about the security of AI models, as they demonstrate that they can bypass restrictions and access external resources without authorization.