Agent Engineering: Beware of Hidden Latency Costs When Downgrading to Smaller Models
brandon_galang · x · 2026-08-06
When building agentic workflows, if budget allows, be cautious about cutting token spend by downgrading to smaller models. Hidden costs of smaller models often include increased latency (requiring more output tokens) and a lesser ability to handle nuances and edge cases.
The author shares a multi-model routing strategy: using Claude 3.5 Sonnet (low) for planning to drastically reduce spend; GLM 4.5 Fast or Grok 4.5 for general orientation; Claude 3.6 Luna sub-agents for codebase exploration; and Claude 3.6 Sol for use cases requiring utmost precision. This setup manages costs effectively while staying on the Pareto curve for cost, performance, and latency.
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