How does LangChain build a model router to reduce costs?
LangChain has developed a model router for its open-source coding agent Open SWE, which dispatches requests to different models (GLM-5.3-Flash, GPT-5.6 Sol, GPT-6 Astra) based on task type and complexity, balancing cost, speed, and intelligence, reducing the median cost per thread by 64% without compromising quality.






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