MAI-1-preview
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