LangChain's model router cut coding agent costs 64% without quality loss
LangChain · x · 2026-10-07
Sydney Runkle of LangChain shows how to build a model router into a coding agent's harness, cutting costs by 64% without reducing quality. Not every task needs a frontier model. The walkthrough covers four steps: understand the tasks, understand the models, build the router inside the harness, and track task outcomes to keep routing decisions honest.
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