LlamaIndex, originally launched as GPT Index by Jerry Liu a year ago, has rapidly grown in the generative AI field to address the limitations of context size in models like GPT-3 and GPT-4-Turbo by using Retrieval-Augmented Generation (RAG). Over the past year, it has amassed over 450 contributors and nearly 900,000 monthly downloads, establishing a strong community ranging from individual developers to Fortune 500 companies. Significant milestones include the launch of the GPT Tree Index, various data loaders for platforms like Notion and Slack, and integration with the ChatGPT API and Plugins. The company raised $8.5 million in funding and introduced new features like Data Agents and Agent Tools, Typescript packages, and multi-modal capabilities with GPT-4-vision. The project's open-source nature and vibrant community continue to drive its innovation and expansion.