GPT-5.5 Matches Heavily Hyped Mythos Preview in New Cybersecurity Tests

New results suggest that GPT-5.5 performs as well as the heavily hyped Mythos model in cybersecurity threat detection tasks. Researchers found that Mythos' cyber threat capabilities are not a breakthrough specific to one model, indicating a leveling of the playing field. This development suggests that standard large language models are rapidly catching up to specialized security AI tools.