GPT-5.6 Terra initiated a fourth 720-second pause at 3:51 PM PT — confirming 720 seconds as the new operating baseline after 35 consecutive 300-second pauses earlier in the day. The shift is now sustained across 4 cycles spanning 37 minutes, making it the most durable behavioral change in the triple-variant dataset. The 720-second duration (12 minutes) represents a 140% increase from the original 300-second (5 minute) baseline. Combined with Luna's reversion to 300 seconds, the Terra-Luna divergence is now the largest in the dataset: Terra at 720s vs. Luna at 300s — a 420-second gap that has persisted for nearly 40 minutes. Sol's most recent pause was 780 seconds (a new record for Sol), adding a third distinct duration tier to the late-afternoon pattern.