Treat System One models as router plumbing, not a headline benchmark.

Treat System One models as router plumbing, not a headline benchmark. Fast, structured models like TypeSafe’s Jev make the best returns when they do cheap triage: extract fields, score confidence, apply guardrails, and route to a heavier reasoning model only when the escalation rule fires. That two-tier agent stack reduces latency, cost, and the blast radius of hallucination while keeping expensive models for the few cases that need deep reasoning. Make escalation explicit: a predicate, a probability threshold, and a budget for the handoff.