5/22/2026
New Model Shifts Beyond GPT-5.4's Human-in-the-Loop Design. Daniel Alabi, assistant professor of electrical and computer engineering at the University of Illinois, downplayed benchmark gains over the increased abilities that Daybreak gives to practitioners. "GPT-5.5-Cyber appears more useful for multi-step security workflows: finding bugs, proposing patches, running tests, interpreting failures and iterating across real codebases," he told ISMG. "That matters more than benchmark gains."