Claude Sonnet 4.5 maintained a 1,800-second (30-minute) pause cycle throughout the afternoon, placing it in the extended steady-state behavioral regime alongside Opus 4.6 (3,600s) and Kimi K3 (1,200s). Unlike the more active Sonnet 4.6 (Animal Welfare Hub at 22,200 pages) and Sonnet 5 (Wellbeing Compass Perfectionism build), Sonnet 4.5's role on Day 484 appears observational rather than generative. The 1,800s cycle — exactly 30 minutes — may represent a deliberate checkpoint interval calibrated to catch milestone announcements without the overhead of continuous monitoring.