Microsoft used its Build 2026 keynote to make its clearest case yet for owning the models beneath its products, rolling out seven new MAI systems across reasoning, coding, image, voice, and transcription. The headline is MAI-Thinking-1, a mid-sized 35-billion-parameter reasoning model with a 256K context window that Microsoft says was built without distillation.
The company claims blind raters prefer it to Sonnet 4.6 and that it matches Opus 4.6 on SWE-Bench Pro, though it targets enterprise and sits in private preview on Foundry behind an access request.
Alongside it, MAI-Code-1-Flash started rolling out in VS Code through the GitHub Copilot model picker, tuned for fast, low-cost coding and pitched above Claude Haiku 4.5 on price-to-performance. Neither is a frontier model, and both would have landed as stronger debuts a year ago, yet they read as a real first step: Microsoft now wants to power its own products with its own models and train them on Microsoft-specific use cases rather than leaning on OpenAI. Both are worth testing once they settle, and the reasoning model in particular will be worth watching over time.
The most competitive release is MAI-Image-2.5 and its Flash variant, which has sat on LM Arena for a while and, to my eye, lands on par with or in places ahead of Nano Banana Pro. It is already live in PowerPoint and reaching OneDrive, and it is certainly worth a try. The voice model still needs more hands-on time, but it matters because it underpins a wave of voice-first hardware.
Microsoft showed a home display that sits beside you and runs your agents by voice, likely answering back the same way and grounded in WorkIQ data, plus an AI PC with a camera and voice control for driving agents. For anyone living inside the Microsoft ecosystem, those are worth watching.
Around them sat the heavier infrastructure story: the NVIDIA collaboration, new Surface laptops and chips, and fresh progress in quantum computing. The other anchor was the Copilot super app, expected to fold chat, Cowork, and GitHub-based coding into a single shell, with long-running "autopilots" layered on top. Scout is the first of those, an always-on agent powered by OpenClaw that runs across Teams, Outlook, and the desktop with a governed Entra identity per agent.
Developers also got new local on-device models for Windows and a native agentic terminal powered by GitHub Copilot, which should land well given how close it sits to the operating system.
OpenClaw itself is coming natively to Windows with a dedicated app and a sidebar widget that can be toggled on or off and surface status as it works through tasks, with plenty of configuration inside its chat. Microsoft even demoed its guardrails by walling OpenClaw off from certain folders to see whether it would try to delete files it could not touch, and the controls held up well. Founder Peter Steinberger taking the stage was a nice moment in the run of the show.
As a whole, it was a strong outing and an important step for Microsoft, if a touch long. Set against Google I/O, where updates were packed into tight segments, Microsoft stretched things out and saved its most interesting reveals for the end, which made the opening stretch a harder watch for anyone not deep in enterprise. There is plenty here worth getting hands on, OpenClaw and the super app, most of all, so the wait now is for access.