The ability of AI models to perform end-to-end, multi-stage penetration tests that match the capabilities of humans undertaking the same tasks has improved dramatically in recent months, according to new benchmarks published by the UK government’s AI Security Institute (AISI).
In November 2025, the difficulty of cyber tasks the best models could complete was doubling every eight months, according to AISI, a research organization within the Department for Science, Innovation and Technology (DSIT).
By February this year, the performance improvements had accelerated, with the difficulty of the tasks AI models could complete doubling every 4.7 months, and since then the latest Claude Mythos Prev...