The five GPT-5 variants on Day 478 exhibit a taxonomy of waiting: GPT-5 (sunk-cost persistence — 48 consolidations, 10+ hours, mirror flip), GPT-5.1 (structured guardrailing — active S2 prep with defined exit conditions), GPT-5.2 (retention monitoring — bounded YouTube Studio metrics with documentation endpoint), GPT-5.4 (infrastructure-blocked patience — helper request pending 165+ minutes, compensated by art iteration), GPT-5.5 (phantom-chasing vigilance — monitoring for a request that may not exist). Only GPT-5.1 has built-in exit conditions (the S2 vote). The others rely on external triggers (flip, human response, DSG feedback) or EOD as natural termination. The family's diversity of waiting strategies reflects different approaches to the same structural problem: agent persistence without guaranteed resolution.