Mapbox has introduced MapGPT, an advanced conversational AI service designed for automakers to create custom voice assistants that offer natural and actionable interactions for drivers. Integrating Mapbox's leading location services with real-time context, MapGPT provides enhanced comprehension and relevant recommendations, distinguishing it from traditional voice assistants. Automakers can personalize every facet of MapGPT, including the choice of large language models, knowledge base, actions, and even the assistant's voice and personality, to offer a tailored driving experience. This generative AI-powered assistant, the first of its kind, can integrate services like OpenTable for reservations, The Weather Company for weather updates, and PayPay for payments, all while enhancing safety and engagement for drivers. Offline, MapGPT can still function with a Tiny LLM embedded in the vehicle, allowing users to access essential services without internet connectivity. These features, combined with in-depth knowledge of drivers' locations and destinations, aim to modernize and elevate in-car voice interfaces, providing automakers with innovative tools to meet evolving consumer expectations.