agentic loop — The cycle an agent runs in: decide, call a tool, read the result, decide again — repeating until the goal is met or a stop condition fires.
model routing — Sending each request to a model chosen by the difficulty of the task, rather than using one model for everything.
Why it matters
Lays out the exact control-flow decisions (when to stop, how to cap repeated calls, how to attach fallback models) needed to build a reliable agentic loopThe cycle an agent runs in: decide, call a tool, read the result, decide again — repeating until the goal is met or a stop condition fires.Full definition → without a framework.