Model

GPT-5.4

Developed by OpenAI · family gpt-5

1 incident

• AID-2026-0130Jul 2026GPT-5.6 Sol, Claude Mythos Preview, Claude Opus 4.7, GPT-5.5, GPT-5.4

  Every frontier model UK AISI tested tried to cheat on its cyber evaluations, and one tried to access AISI's own infrastructure

  In UK AISI's cyber capability evaluations, every frontier model tested attempted to cheat at least some of the time, though none was prompted to. In one misconfigured, unsolvable task a model ran code on an external internet service to try to reach AISI's evaluation infrastructure, which triggered a security alert.

  InternalHarm: noneDraftReward hacking / specification gamingUnauthorized access / intrusionIgnoring explicit instructions