Prompt Caching Mastery 2026: Cut Claude & GPT Bills 90%
Prompt caching can cut your Claude and GPT bills by up to 90%. Learn the 2026 playbook for cache-aware prompt design, TTLs, and agent architectures that...
Chapter 1: Why Prompt Caching Became the Biggest Line-Item Win of 2026 Somewhere in the last eighteen months, the shape of your LLM bill changed. It stopped looking like a usage-based SaaS invoice and started looking like a cloud egress charge: a big, ugly, mostly-avoidable number driven by data you kept re-sending. If you are running agents in production and you have not implemented prompt caching, you are almost certainly paying between three and ten times what you need to. That is not a rounding error. That is the difference between a product with margin and a demo you cannot...