Model routing 101: stop overpaying for AI

Routing is the discipline of matching each step to the right model. Three questions decide the tier: does this define quality, how often does it run, and what does a wrong answer cost?

Reasoning-defining, low-volume, high-cost-of-error steps get your strongest model. High-volume, mechanical steps get the cheap, fast one.

Put the routing table in config, not code — a model price change should be a deploy of data, not a rewrite.