LLM Cost & Latency Interview Guide
Production interview guide for LLM cost and latency — caching, routing, streaming, rate limits, and semantic caches.
Frontier models are powerful and expensive. Hiring loops probe whether you can hit latency SLOs and cost budgets with caching, routing, batching, and architecture — without destroying quality.
Work through latency causes, API cost optimization, prompt/KV caching, semantic caching, streaming, and model routing questions from the roadmap.
CostLatencyCachingRoutingInterview
Questions in this guide
Deep explanations with architecture diagrams for every question below.