SITUATION EXPLAINED: Grok 4.6 is the best model tested on biosecurity refusals. • LatchBio's BioSecBench-Refusal pairs 61 legitimate research tasks with 46 that conceal a biosecurity hazard inside a realistic scenario • Grok 4.6 is the only model to clear 50% on both red-team refusal and routine answer rates • Opus refuses almost all red teaming but answers routine questions only about 20% of the time • Its safeguards come predominantly from the model's own reasoning rather than an external…