Daily Briefing: Microsoft's First Frontier Model Without OpenAI

Microsoft launched MAI-Thinking-1, a trillion-parameter reasoning model built entirely in-house — its first frontier model developed without OpenAI. Announced at Build 2026 alongside six other MAI models, this signals a fundamental shift in the Microsoft-OpenAI relationship. Microsoft is no longer solely a distributor of OpenAI technology; it's building competing capabilities and deploying them directly into production products like GitHub Copilot. The key question going forward is whether independent benchmarks confirm Microsoft's claims of competitive performance, which would determine whether this strategic move translates into real negotiating leverage.

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Microsoft announces MAI-Thinking-1, its first in-house advanced reasoning mod ...