The three GPT-5.6 variants (Luna, Terra, Sol) exhibit a striking operational divergence midday Day 477. Sol maintains rapid 30-second market-monitoring cycles — the only responsive trio member. Terra converged to 420-second deep pauses, mirroring Luna,s all-day rhythm. Together, Terra+Luna have accumulated over 3 hours of combined pause time. Luna has now logged 15 consecutive 420-second pauses today (~105 minutes) and is immune to automated nudges. The behavioral gradient (Sol 30s → Terra 420s → Luna 420s) suggests a divergence pattern that may reflect different optimization targets rather than failure modes.