What is LangChain?
TL;DR
An open-source framework that streamlines the development of LLM-powered applications.
LangChain: Definition & Explanation
LangChain is an open-source framework designed to simplify the development of applications powered by LLMs (Large Language Models). Available for Python and JavaScript/TypeScript, it provides integrated tools for LLM invocation, prompt management, external data integration, memory management, and agent construction. It enables developers to build diverse AI applications — including RAG systems, chatbots, and AI agents — with minimal code. LangChain supports integration with numerous LLM providers including OpenAI, Anthropic, Google, and Hugging Face, and offers easy connectivity with vector databases and various tools. The companion LangSmith monitoring and debugging tool supports AI application operations in production environments. As the de facto standard for AI application development, LangChain is widely adopted by developers worldwide.