AI Control: usefulness-safety frontier (Greenblatt et al. 2024) usefulness (useful outputs / total) -> safety (1 - backdoor ship rate) -> baseline (no protocol) upfront audit (H) trusted editing untrusted monitoring protocol roles U = untrusted strong T = trusted weak H = trusted human baseline : ship U upfront : audit all w/ H t-edit : T gate, H on low conf u-monitor: U on U, H on flag trusted editing Pareto-dominates untrusted monitoring on the Greenblatt 2024 code-backdoor task. collusion risk: two U instances can coordinate via steganography or shared training priors. limits: H does not scale; T-to-U capability gap caps editing signal; control is not alignment.