Jev + Opus 5.5 vs Opus alone: 5x lower cost on the same task
Across 60 decisions, 57 were handled by Jev, cutting cost from $2.24 to $0.43 and time from 3m37s to 1m15s.
Jev + Opus 5.5, side by side. same agent. same task. same 60 decisions. Opus-only: $2.24 - 3m 37s Jev + Opus: $0.43 - 1m 15s the difference is who makes the small calls: which tool runs next - Jev is this output good enough - Jev is the goal met - Jev rewrite the refund handler - Opus 57 of 60 decisions never touched Opus. what you're watching: left routes every decision through Opus 5.5. right asks Jev first, Opus only fires when the task needs real reasoning. per decision: $0.032 -> $0.00025. watch the cost counters, not the output. the output is identical. full setup in the post below ↓
This post quotes another post: “Jev handles routing while Opus 5.5 reasons in a cheaper agent architecture”