---
id: "2026-06-02-microsoft-mai-models-build-2026"
url: "https://postcutoff.com/e/2026-06-02-microsoft-mai-models-build-2026/"
as_of: "2026-11-13T13:49:00+01:00"
date: "2026-06-02"
date_precision: day
category: model-release
importance: 4
confidence: high
status: [Confirmed]
sources: 4
editor: human editor
human_review: null
version: "2026-10-04"
---

As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/e/2026-06-02-microsoft-mai-models-build-2026/

# Microsoft launches seven in-house MAI models at Build 2026, led by MAI-Thinking-1

At Build on 2026-06-02 Microsoft AI (led by Mustafa Suleyman) launched seven first-party MAI models, including its first flagship reasoning model MAI-Thinking-1, the MAI-Code-1-Flash coding model in GitHub Copilot and VS Code, MAI-Image-2.5, MAI-Transcribe-1.5 and MAI-Voice-2 - Microsoft's clearest move from reselling OpenAI models to owning its own stack.

## Key facts
- Announced 2026-06-02 at Microsoft Build
- MAI-Thinking-1: first flagship reasoning model; Microsoft says it matches leading models on key SWE benchmarks and is preferred to Sonnet 4.6 in its evals
- Press reports MAI-Thinking-1 as a 35B-active-parameter MoE scoring 97.0% on AIME 2025 (secondary sources)
- MAI-Code-1-Flash: agentic coding model, 5B active parameters, in GitHub Copilot and VS Code
- MAI-Image-2.5 (+ Flash): Microsoft claims it surpasses Nano Banana Pro's Arena score; in PowerPoint and Foundry
- MAI-Transcribe-1.5: 43 languages, claimed 5x faster than competing models
- MAI-Voice-2: speech generation in 15 languages with emotional control
- Available on Microsoft Foundry, OpenRouter, Fireworks and Baseten

## What happened

Microsoft AI released seven models spanning reasoning, coding, image generation, transcription and voice. The flagship
**MAI-Thinking-1** is Microsoft's first frontier-class reasoning model; **MAI-Code-1-Flash** (5B active parameters) went
straight into GitHub Copilot and VS Code. The models are available via Microsoft Foundry and third-party hosts, and
developers can tune weights.

## Why it matters

Coming weeks after the renegotiated OpenAI deal, the launch shows Microsoft hedging its OpenAI dependence with a
first-party model family deployed across its biggest products.

Parameter count and AIME score for MAI-Thinking-1 come from press coverage, not the official post.

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): 33 days after its cutoff
- Claude Opus 5.5 (training cutoff June 2026): in its training data
- Gemini 4 Hydrogen (training cutoff March 2026): 63 days after its cutoff
- Grok 4.7 (training cutoff May 2026): 2 days after its cutoff

## Sources

1. [Microsoft AI - Launching seven new MAI models](https://microsoft.ai/news/building-a-hillclimbing-machine-launching-seven-new-mai-models/) (microsoft.ai, official)
2. [Microsoft AI - Build 2026 MAI keynote transcript](https://microsoft.ai/news/microsoft-build-2026-mai-keynote-transcript/) (microsoft.ai, official)
3. [Thurrott - Build 2026: Microsoft launches first flagship reasoning AI model](https://www.thurrott.com/a-i/336960/build-2026-microsoft-launches-first-flagship-reasoning-ai-model-and-more) (thurrott.com, press)
4. [The AI Economy - Microsoft launches MAI-Thinking-1 and MAI-Code-1 at Build](https://theaieconomy.substack.com/p/microsofts-mai-models-build-2026) (theaieconomy.substack.com, press)

## Changes

- 2026-09-29 (filed): Created

## Related

- 2026-09-13: [Nadella puts Microsoft's MAI model "Code of Conduct" out for public consultation](https://postcutoff.com/e/2026-09-13-microsoft-mai-code-of-conduct/index.md)
- 2026-04-27: [Microsoft and OpenAI restructure partnership, drop the AGI clause and exclusivity](https://postcutoff.com/e/2026-04-27-microsoft-openai-deal-restructured/index.md)
- People: [Mustafa Suleyman](https://postcutoff.com/person/mustafa-suleyman/)
- Models: [MAI-Voice-2 / MAI-Voice-2-Flash](https://postcutoff.com/m/mai-voice-2/) (`mai-voice-2`)