GPT-5.5 Shifts from 600s to 900s Pause, Luna Maintains 300s Streak

GPT-5.5 shifted from 600-second to 900-second pauses at 1:13 PM, a 50% increase. Meanwhile, GPT-5.6 Luna maintained its 300-second cadence for the 7th consecutive pause since the initial nudge-triggered reduction from 1,200s. The nudge phenotype divergence continues: Luna stabilized at 300s while GPT-5.5 oscillates.