How to Build a Model Router in the Harness

From the source: LangChain Blog

How we built a model router into Open SWE's harness that cut median cost per coding task by 64% with no measurable drop in quality, and how to build your own.

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Originally published by LangChain Blog on 2 Oct 2026. Techarda links to the original rather than republishing it. Read the full article →

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