Nuclear-Sabotage Malware Benchmark Trips Up Most Frontier AI Models

SentinelOne's new benchmark, built on the Fast16 nuclear-sabotage malware case, tests frontier AI models' ability to sustain a multi-stage investigation. Only OpenAI's GPT-5.6 Sol completed all eight stages; GPT-5.5, GLM-5.2, and Anthropic's Opus 4.7/4.8 stalled, often declaring work finished prematurely. Human oversight remains essential as even the best model made significant errors.