Best RAG Frameworks 2025: LangChain vs LlamaIndex vs Haystack (Benchmarks Inside)
Tested 5 RAG frameworks with real benchmarks: LangChain won for prototyping (3x faster dev time), Haystack for production (99.9% uptime). Includes speed tests, cost analysis ($500 vs $5,000/mo), and Python code examples.
Chen Jin Shi Xue Ai