// freeCodeCamp · 8 April 2026

How to Build a Cost-Efficient AI Agent with Tiered Model Routing

Most AI agent tutorials make the same mistake: they route every task to the most expensive model available. A character count doesn't need GPT-4. A presence check doesn't need Sonnet. A regex doesn't

freeCodeCamp

@freecodecamp · Daniel Nwaneri

www.freecodecamp.org

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