APEX: 269M and 10.5M Transformers Cut Wireless Telemetry MAE 18% Over Toto

APEX is a decoder-only transformer pretrained on 100K access-point time series across 34 metrics from ~4,500 production networks. APEX-Large (269M) beats the Toto foundation model baseline by 18% MAE on a 4-day DHCP degradation forecast and achieves anomaly detection F1 of 0.93; APEX-Edge (10.5M) runs sub-second on-device.