LlamaIndex is a data framework specifically designed for connecting custom data sources to large language models (LLMs). It offers a simple and flexible approach to integrate various types of data with LLM applications. With LlamaIndex, users can connect their existing data sources and formats, including APIs, PDFs, documents, and SQL, to be utilized within LLM applications. The tool provides data ingestion capabilities, allowing the storage and indexing of data for different use cases. Integration with downstream vector store and database providers is also supported.LlamaIndex stands out with its query interface, which allows users to input prompts and receive knowledge-augmented responses based on their data. This feature enables the creation of powerful end-user applications such as document Q&A and data augmented chatbots. Additionally, LlamaIndex can be used to index knowledge bases and task lists, supporting the development of automated decision machines.The tool supports various types of data sources, including unstructured sources like documents, raw text files, PDFs, videos, and images. It also seamlessly integrates structured data sources from Excel and SQL, as well as semi-structured data from APIs like Slack, Salesforce, and Notion.LlamaIndex provides several resources for users, including documentation, a Discord community, an official Twitter account, and a blog. It is available on GitHub under the LlamaIndex repository, and related products such as LlamaIndex.TS, LlamaHub, and LlamaLab are also accessible. Users can unleash the power of LLMs over their data by leveraging the capabilities of LlamaIndex.