Stop hardcoding LLM SDKs: Dynamic LLM routing with OpenRouter and Next.js
SMRTR summary
Routing every LLM prompt to your most expensive model wastes money. This tutorial walks through building an intelligent routing layer in Next.js using OpenRouter and TanStack AI that classifies prompts by task type and dispatches each to the cheapest capable model. A simple test showed ~80% cost reduction, with keyword or LLM-based classifiers and automatic model fallback included.
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