UK AI Security InstituteArticleoriginally Jul 2026
How Far Behind the Frontier are Leading Open Weight Models on Cyber?
Open-weight models are gaining on the frontier faster than they were six months ago. This changes the threat model for deployers and the economics for frontier labs. For infrastructure builders: the business case for fine-tuning open models on proprietary data just got stronger. For frontier companies: expect regulatory pressure to accelerate if open-weight cyber capabilities keep closing the gap at this rate.