LangChain Has a Free Python Framework for Building Apps Powered by LLMs

LangChain is the most popular framework for building LLM-powered applications. It connects LLMs to your data, APIs, and tools. What You Get for Free Chains — compose LLM calls with logic Agents — LLMs that use tools autonomously RAG — retrieval-augmented generation Memory — conversation history 50+ LLM providers — OpenAI, Anthropic, local models 100+ integrations — vector stores, loaders, tools RAG Pipeline from langchain_openai import ChatOpenAI , OpenAIEmbeddings from langchain_community.vectorstores import Chroma from langchain.chains import RetrievalQA llm = ChatOpenAI ( model = ' gpt-4 ' ) db = Chroma . from_documents ( docs , OpenAIEmbeddings ()) qa = RetrievalQA . from_chain_type ( llm = llm , retriever = db . as_retriever ()) result = qa . invoke ( ' What is our refund policy? ' ) LangChain vs LlamaIndex Feature LangChain LlamaIndex Focus General LLM apps Data/RAG Agents Full framework Data agents Flexibility Higher More opinionated Need LLM app development? Check my work on Gi