This article explains how to optimize the speed and reduce the cost of LLM (Language Machine Learning Model) applications by integrating GPTCache. GPTCache can reduce latency, making applications faster, and save computational resources by reducing the number of calls to the LLM, thereby lowering costs. GPTCache is scalable and suitable for applications of various sizes. The article summarizes the advantages and best practices of GPTCache, and provides steps and advanced techniques for integrating with LLM.