11 Minutes, $1.73, and GPT-5.5 Cybersecurity Simulation

The UK AI Security Institute says GPT-5.5 cybersecurity simulation results now look a lot less like a one-off milestone and a lot more like a repeatable frontier capability. In its latest evaluation, AISI found that an early checkpoint of OpenAI’s GPT-5.5 reached roughly the same level as Anthropic’