←Applied AI Engineering
Chapter 18 of 23 · Level 9 · Production & Capstone

Caching Is the Cheapest Win

Prompt caching, why a stable prefix is the whole trick, and the four ordinary habits that silently destroy a hit rate.

  1. 18.1

    Caching Is the Cheapest Win

    Before you switch models or tune a serving engine, look at what you resend on every call. An agent repeats the same prefix hundreds of times, and caching it is the one cost lever that costs nothing in quality.

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