Overview
Formerly known as GPT Index, LlamaIndex focuses specifically on the 'data' part of the LLM stack. It helps bridge the gap between your custom data and the LLM's reasoning capabilities.
Key Features
- Data Connectors: Ingest data from APIs, PDFs, SQL databases, and more.
- Data Indexes: Structure data into formats optimized for LLM retrieval (e.g., Vector Store, Tree Index).
- Query Interface: A simple way to ask questions of your data and get context-aware answers.
Comparison with LangChain
While LangChain is a general-purpose framework for LLM apps, LlamaIndex is more specialized for data retrieval and management (RAG).