Cost per Run

In one line

What one complete task costs in model calls, tool calls and time, and what that becomes at ten times the volume.

Picture it

A taxi meter that runs faster the better the driver is at finding scenic routes.

Under the hood

Agents cost more the better they work, because they take more steps. Measure cost per run from the first week, set a ceiling per run and per day, route cheap steps to small models, and treat a ceiling breach as an alert, not an invoice.