Model Routing

Pick the model per call, not per project.

A single-tier deployment is either overpaying for easy turns or underdelivering on hard ones. The lever is matching model capability to the specific decision the call is making — and only escalating when the cheaper model demonstrably fails.

When to use this skill

• The user is choosing a model for a new agent.
• The user is on the most expensive tier for everything and the bill is climbing.
• The user is on the cheapest tier and quality is borderline.
• The user is building or evaluating a router / cascade / draft-then-verify pipeline.
• The user mentions Opus, Sonnet, Haiku, GPT-5, GPT-4o-mini, Gemini Pro/Flash, model fallback, or hybrid inference.

Decision flow