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MAI-1-preview

MicrosoftProprietaryPending Human Review

MAI-1-preview is Microsoft AI’s first foundation language model trained end-to-end in-house, initially offered for public testing on LMArena. It is an instruction-oriented mixture-of-experts model for everyday consumer questions and helpful responses. Microsoft also invited trusted testers to apply for API access and announced gradual integration into selected Copilot text use cases. Public testing qualifies as preview availability, but neither unrestricted API access nor downloadable weights were released with it.

2025-08-28
Mixture-of-experts; further architecture undisclosed
Proprietary

Specifications

Architecture
Mixture-of-experts; further architecture undisclosed
License
Proprietary
Type
text
Modalities
text

Benchmark Scores

Advanced Specifications

Model Family
MAI
API Access
Available
Chat Interface
Available

Capabilities & Limitations

Capabilities
instruction followingconversationgeneral question answering
Known Limitations
Preview with restricted API accessParameter count and context length not publicly disclosed
Notable Use Cases
consumer assistantspublic model evaluation

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