Open Weight Models Cut Cyber Gap With Frontier To 4-7 Months
The UK's AI Security Institute tracked the lag itself shrinking, down from six to ten months across most of 2025's model releases.
- AISI's July 17, 2026 report sets today's lag at four to seven months.
- Through most of 2025, closed frontier models kept a six to ten month lead.
- AISI is the UK government office built to measure frontier AI's real world risks.
Why it matters: A shrinking gap measures how fast dangerous capability stops belonging only to the guarded labs.
AI Security Institute (AISI) blog ↗ · Jul 18, 20267/18/26 · ✓ Checked✓ Check