Microsoft unveils MAI-Thinking-1, its first in-house reasoning AI model at Build 2026
By
Jay Peters
Warm and crisp on the edges. A bagel with a bit of bite.
Summary
Microsoft announced MAI-Thinking-1, its first advanced reasoning AI model, at Build 2026. The medium-sized model is part of a broader release of seven new in-house AI models, marking Microsoft's continued push into independent AI development after previously relying on OpenAI's models. The two companies recently renegotiated their deal to loosen ties. Microsoft claims MAI-Thinking-1 matches leading models on key software engineering benchmarks and was trained from the ground up by Microsoft.
Key quotes
· 5 pulledMicrosoft 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.
According to Microsoft, MAI-Thinking-1 is a 'medium-sized model' that 'matches leading models' on 'key' software engineering benchmarks.
Microsoft says the company 'trained it from the ground up'
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