LangChain vs LlamaIndex for AI Agents: Which to Choose
If you’re building an AI agent in 2026, you’ll likely evaluate both LangChain and LlamaIndex before committing to one. They’re the two most widely adopted open-source frameworks for LLM-powered applications – but they were built for different problems, and that distinction matters more when you’re deploying agents than when you’re running a prototype. The short version: LangChain is a general-purpose agent orchestration framework. LlamaIndex is a data framework that has grown into agent territory. The right choice depends on whether your agent’s core challenge is workflow orchestration or knowledge retrieval. ...