# Microsoft AI — Two in-house models in support of our mission | Microsoft AI

- Company: Microsoft AI (microsoft.ai)
- Announced: 2025-08-28
- Category: model-update
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://microsoft.ai/news/two-new-in-house-models/
- Record: https://forck.live/items/10973-two-in-house-models-in-support-of-our-mission-microsoft-ai
- Subject: MAI
- Models affected: MAI-Voice-1, MAI-1-preview

Microsoft AI previewed two in-house models: MAI-Voice-1, a speech generation model now powering Copilot Daily and Podcasts and available in Copilot Labs, and MAI-1-preview, a mixture-of-experts foundation model trained on ~15,000 NVIDIA H100 GPUs, now in public testing on LMArena and available to trusted testers via API access. MAI-1-preview is designed for instruction-following and everyday queries, and will be rolled out for certain text use cases within Copilot over the coming weeks.

## Evidence

Verbatim from https://microsoft.ai/news/two-new-in-house-models/:

> First, we're releasing MAI-Voice-1 , our first highly expressive and natural speech generation model, which is available in Copilot Daily and Podcasts, and as a brand new Copilot Labs experience to try out here . Voice is the interface of the future for AI companions and MAI-Voice-1 delivers high-fidelity, expressive audio across both single and multi-speaker scenarios.

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Record: https://forck.live/items/10973-two-in-house-models-in-support-of-our-mission-microsoft-ai
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