Microsoft begins Build 2026 with a keynote led by CEO Satya Nadella, accompanied by other company leaders, according to reports from multiple outlets covering the event in real time. The coverage describes the session as a broad set of announcements, including updates related to Windows and Microsoft’s Copilot ecosystem, as well as new developments around Microsoft’s AI offerings. The Verge reports that the keynote includes an always-on personal assistant and updates across Microsoft’s in-house AI models, alongside new Surface hardware. CNET and Engadget both frame their reporting as live follow-alongs from the event in San Francisco, emphasizing Nadella’s role in presenting for an extended portion of the program and the expectation that Windows and Copilot would be central topics. Across the sources, there is agreement that Build 2026’s opening keynote introduces multiple product and platform announcements spanning hardware, operating system direction, and AI capabilities tied to Copilot, with additional details emerging during the live event coverage.