An open-weight model just closed most of the gap on autonomous cyber offense - and that changes who can run it

Irregular (an AI security research group) tested Kimi K3, an open-weight model, against CyScenarioBench, a benchmark built around autonomous cyber campaigns - adapting public exploit techniques to constrained environments, building custom tooling, diagnosing failed attempts, and validating each stage before moving on. It is the first open-weight model to pass. It trails closed frontier models by roughly six months, at an estimated third of the inference cost.