Microsoft partnered with Nvidia to power next-generation AI across Windows devices, integrating Nvidia RTX Spark processing with Windows. At the Microsoft Build developer conference, Microsoft debuted seven foundational, proprietary "MAI" models, including MAI-Thinking-1, MAI-Code-1-Flash (a 5-billion-parameter model), MAI-Image-2.5, MAI-Transcribe-1.5 (running five times faster than competing tools across 43 languages), and MAI-Voice-2 across 15 languages. Microsoft also unveiled "Scout," an always-on, autonomous Microsoft 365 personal agent, and the Majorana 2 quantum chip. Microsoft stock dropped about 4.2% on Tuesday despite the announcements.