ModelRefs / LangChain — AI Glossary
LangChain — AI Glossary
An open-source Python and JavaScript framework for building LLM-powered applications with chains, agents, and retrieval components.
Overview
LangChain provides abstractions for model I/O, retrieval, memory, agents, and callbacks. Its composable chain interface became the dominant pattern for LLM app development. LangSmith is its evaluation and observability companion. LangGraph adds stateful graph-based agent orchestration.
Reference details
| Topic | frameworks |
|---|---|
| Last reviewed | 2026-06-24 |
Related terms
Continue your research
Use these connected ModelRefs sections to compare alternatives, inspect implementation paths, and review the evidence and governance boundaries relevant to LangChain — AI Glossary.
Frequently asked questions
What is LangChain?
An open-source Python and JavaScript framework for building LLM-powered applications with chains, agents, and retrieval components.
What concepts are related to LangChain?
Closely related concepts include langgraph, llamaindex, agent, rag.