James' Growth Diary

May 15, 2026 · Artificial Intelligence

Five Intent Recognition Designs: From Keyword Matching to Classifier to LLM Self‑Routing – A Decision Tree to Choose the Right One

The article breaks down five production‑grade intent‑recognition designs—keyword matching, regex‑rule engine, embedding classifier, fine‑tuned small model, and zero‑shot LLM routing—provides code snippets, latency and cost benchmarks, decision‑making rules, and shows how a layered architecture can cut API costs from ¥80,000 to ¥3,000 while keeping accuracy above 90%.