Performance & Caching
Nov 13, 2026•16 min read
LLM Prompt Caching Architecture: Prefix KV-Cache Reuse, 1,024-Token Thresholds and Sub-300ms TTFT FinOps Optimization
Dissecting GPU Prefill vs Decode phases, explaining Prefix KV-Cache reuse and the 1,024-token caching threshold across frontier models, and cutting inference costs to 0.2047¢/task via semantic caching.