VX-One: Typed, Calibrated Decision Heads for Real-Time Perimeter Triage - An empirical study of unknown-attack honesty, cascade gray zones, and calibration under drift

A late-2026 empirical study of VX-One, a class of commercial System One decision models including TypeSafe Jev and Microsoft-Decision, evaluates typed, calibrated decision heads for real-time perimeter triage, examining unknown-attack honesty, cascade gray zones, and calibration under drift. The study frames perimeter triage as a latency/semantics trade-off, in which signature engines are fast and format-safe but blind to unseen attacks while generative models are semantic but slow and produce unparseable output.

Perimeter triage faces a latency/semantics trade-off: signature engines are fast and format-safe but blind to unseen attacks, while generative models are semantic but slow and produce unparseable output. In late 2026 a class of commercial System One decision models TypeSafe Jev; Microsoft-Decision-