Tag #model-behavior 1 post tagged model-behavior. ← All topics deep-dive Predicting Model Behavior Before Release: What OpenAI's Deployment Simulation Means for MLOps OpenAI's Deployment Simulation replays 1.3M real conversations through candidate models before release, hitting 1.5x median error on safety predictions and surfacing behaviors like 'calculator hacking' that conventional evals never find. June 21, 2026