Decoder. plain-English AI glossary

Model routing

▲ Rising

Intelligently choosing which model to run for each request based on latency, cost, or accuracy needs.

Think of it like

A dispatcher choosing between a fast courier and a slow truck depending on urgency and package size.

Example

Simple questions go to a fast, cheap 7B model; complex ones go to a slower, smarter 70B model.

How it actually works

Model routing lets you optimize cost and quality per request instead of one-size-fits-all. You need a router (ML model, rule engine, or heuristic) that decides which model to use. Challenges: building the router, handling failures, and explaining choices to users.

For product teams

Model routing can cut costs by serving simple requests cheaply.

For engineers

Build a router; instrument request metadata so the router has signal; monitor outcomes.

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