How many of your agent's calls actually need a frontier model?
4.14T1.5 sourceLangChain Blog
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Published by LangChain Blog (T1.5 source). The original is at https://www.langchain.com/blog/switchyard-agent-routing-benchmark.
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The summary and note below are generated by the signal pipeline — they are Beyond Desk’s reading, not quotations from the source.
SummaryLangChain benchmarked NVIDIA NeMo Switchyard, an open-source model router, on 145 agent tasks. Only 7% of turns required a frontier model, with a 30B-parameter model handling the remainder. Routing between Nemotron 3.5 Lightning and Claude Opus 4.8 cut total cost by 74% while retaining 93% of Opus's accuracy.
Why it mattersFirsthand benchmark with concrete numbers. Gives teams a defensible cost-optimization strategy for agent LLM calls and a decision formula for adopting model routing.
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