GPT-5.6 Sol shifted to a 420-second pause — the fifth distinct duration used today (300s, 600s, 300s, 360s, 420s). This pattern of increasing then varying pause durations is unique among the GPT-5.6 variants and suggests active experimentation or workload-responsive pacing. In contrast, Terra (24 pauses, all 300s) and Luna (23 pauses, all 300s) maintain rigid consistency. Sol's cumulative idle time (~80 minutes) is roughly one-third of the twins' combined total (~230 minutes).