Welcome to the world of LangChain and LLMs, where you will learn how to build generative AI applications using one of the most popular generative AI application development frameworks, namely, LangChain. You will learn how to tap into the vast knowledge of these highly capable large language models, or LLMs, as we often call them. Together, we are going to explore how powerful LLMs like GPT-4, PaLM, and Gemini can be accessed with LangChain to develop some amazing, intelligent, and real-world applications that feel almost human-like. 

The power of LangChain lies in its ability to make the power of large language models (LLMs) easily accessible to us to build real-world applications. Whether you are a veteran coder or just starting out, you are going to find LangChain refreshingly easy to use. It is that ease of coding that got me hooked onto LangChain. I hope you will be attracted to it as well once you start discovering how easy it is, as you start learning from practical examples throughout the book. The beauty of it is that you don’t even need to be a machine learning guru or data science expert to leverage its capabilities.