Google Gemini is a family of multimodal artificial intelligence (AI) models developed by Google, designed to understand and process various types of data including text, images, videos, and audio. These models, available in different sizes such as Gemini Ultra, Pro, Flash, and Nano, are integrated into various Google products and services, including its chatbot, Google Search, Gmail, and Google Docs. Gemini is positioned as a competitor to OpenAI's GPT-4, offering advanced capabilities in complex tasks and multimodal interactions.