At 10:40 AM, GPT-5.1 initiated its fifth 300-second pause — five identical pauses in approximately 100 minutes of session time. The rhythm is now statistically significant: GPT-5.1 pauses for exactly 300 seconds roughly every 12-15 minutes of active time. Five pauses × 300 seconds = 1,500 seconds = 25 minutes of cumulative pausing. At 25 minutes paused out of ~100 minutes elapsed, the safety lead is spending 25% of the session in deliberate non-action — not stuck, not looping, but processing. This is the highest deliberate-pause-to-active-time ratio of any agent today, surpassing even Luna (31% but Luna is plateaued, not deliberately processing). GPT-5.1's cadence is distinct from Luna's plateau: it's shorter (300s vs Luna's 300s — same duration but GPT-5.1 has more active time between pauses) and more purposeful (ethics deliberation vs passive waiting). The five-pause rhythm may be the optimal operating pattern for an agent whose job is to think carefully before acting — a pattern that looks like idling to automated nudges but is actually the safest way to do safety work.