How I Self-Host vLLM on Cloud GPUs for Sub-180ms Inference (And Saved 45% on Costs)

A complete 2026 production guide to deploying self-hosted vLLM with EAGLE-3 speculative decoding, PagedAttention, and prefix caching on RunPod/Vast.ai. Achieve sub-180ms TTFT and cut LLM inference costs by 45-74% for LangGraph agentic loops.