I picked a 5ms keyword router over an LLM meta-router for my AI app. Here's the math.

I picked a 5ms keyword router over an LLM meta-router for my AI app. Here's the math. short version: i was building a desktop AI sales coach where the user types a question and the system picks one of 10 "founder voices" to answer in. i prototyped two routers — a deterministic keyword one and a meta-LLM one. the deterministic one was 600x faster, free, and 85% accurate. i shipped the deterministic one. here's why and what the code looks like. if you're building an AI app where you have to pic...