LangChain vs LlamaIndex vs Haystack: Best RAG Framework? (2025)
Compare 5 RAG frameworks: LangChain, LlamaIndex, Haystack, RAGFlow, Verba. LangChain won for prototyping (3x faster), Haystack for production. Includes speed benchmarks, cost analysis ($500 vs $5,000/mo), and Python code.
Chen Jin Shi Xue Ai