LangChain Explained: Understanding Models, Prompts, Chains, Memory, Indexes, and Agents (opens in new tab)

Last Updated on June 8, 2026 by Editorial Team Author(s): Atul Kumar Originally published on Towards AI. LangChain Explained: Understanding Models, Prompts, Chains, Memory, Indexes, and Agents Large Language Models (LLMs) such as GPT, Gemini, and Claude have made it easier than ever to build intelligent applications. However, developing production-ready AI systems often requires much more than simply calling an API. This is where LangChain comes in In this article, we’ll explore the core comp...