Microsoft’s first advanced reasoning AI is here

Microsoft introduced MAI-Thinking-1, its first advanced reasoning AI model, at Build 2026. This medium-sized model matches leading software engineering benchmarks and was trained entirely on clean data without using third-party models. The launch marks a significant step as Microsoft moves away from reliance on OpenAI's models.

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Microsoft announced seven new in-house AI models at Build 2026, including MAI-Thinking-1, its first reasoning model.

Microsoft announced a bunch of new in-house AI models at Build 2026, including a new “flagship” model: MAI-Thinking-1. It’s an ambitious step into model development for Microsoft, which introduced its initial in-house models last year — before then, it had relied on OpenAI’s models. The two companies recently renegotiated their deal to loosen ties.

Opening the briefing

Microsoft’s first advanced reasoning AI is here

Original article excerpt