In depth
Model routing is the single biggest cost lever in multi-agent setups. Half of an average coding session is exploration (grep, glob, read), which a small model handles fine. The writing and editing turns need a premium model. Routing each agent to the right model in YAML is two lines of config, the savings are typically 50-65% on real workloads.
Related concepts
Multi-agent systemA set of agents that collaborate, typically a coordinator that spawns specialist workers in parallel.Frontier modelThe highest-quality, most expensive tier from a provider. Claude Sonnet, GPT-4o, Gemini Pro.Brain fallbackA second LLM provider the runtime swaps to when the primary returns an error or runs out of credit.
Read the deep dive
How we cut our coding agent's bill by 60% with model routing
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Engineering notes from the Digitorn team. No marketing, no launch announcements, no "10 prompts that will change your life". Just the things we write that we'd want to read.