LlamaIndex

LlamaIndex (formerly GPT Index) is an open-source data framework designed for building LLM applications, particularly those that need to combine LLMs with private or domain-specific data through techniques like retrieval-augmented generation (RAG). It provides data ingestion, index building, query interfaces, and other functionality to help developers efficiently manage and utilize external data to enhance LLM capabilities. LlamaIndex supports various data sources including documents, databases, APIs, and includes advanced features for document parsing, chunk optimization, and retrieval strategies. The framework has become a popular choice for enterprise applications that need to leverage their proprietary data with LLMs while maintaining performance and accuracy.