LlamaIndex

LlamaIndex (formerly known as GPT Index) is an open-source data framework designed to facilitate the integration and querying of custom data sources with large language models (LLMs). It provides tools for ingesting, structuring, and accessing private or domain-specific data, enabling developers to build LLM-powered applications such as chatbots, document Q&A systems, and knowledge agents. LlamaIndex supports a variety of data connectors, indexing methods, and query interfaces to optimize performance and relevance in LLM applications. It is widely used for retrieval-augmented generation (RAG) workflows.