The answer
LangChain provides more mature tools and abstractions for constructing multi-step autonomous agents.
LangChain vs LlamaIndex: Which Framework Should You Learn?
Which is better for building agents?
More FAQs in LangChain vs LlamaIndex: Which Framework Should You Learn?
Yes, you can use LlamaIndex for data ingestion and retrieval, and pass the output to a LangChain agent loop.
No, you can write vanilla code. Frameworks save time but can add abstraction overhead.
LangChain currently has higher adoption, but LlamaIndex is gaining fast for RAG applications.
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