Microsoft launches seven in-house MAI models at Build 2026, led by MAI-Thinking-1
Confirmed
Importance: major (4 of 5)Status
- Claim
Confirmed
- Our reporting
- High confidence
- Importance
- Major (4 of 5)
- Last verified
- 29 September 2026
Your AI and this story
- GPT-6 Astra33 days after its cutoff
- Claude Opus 5.5In its training data
- Gemini 4 Hydrogen63 days after its cutoff
- Grok 4.72 days after its cutoff
It is after the cutoff of GPT-6 Astra, Gemini 4 Hydrogen and Grok 4.7, and can be in the training data of Claude Opus 5.5.
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.
Sources
4 sources from 3 sites. Numbers match the chips in the text.
4 sources: 2 primary, 2 press
Primary
- Microsoft AI - Launching seven new MAI modelsmicrosoft.ai, official
- Microsoft AI - Build 2026 MAI keynote transcriptmicrosoft.ai, official
Press
- Thurrott - Build 2026: Microsoft launches first flagship reasoning AI modelthurrott.com, press
- The AI Economy - Microsoft launches MAI-Thinking-1 and MAI-Code-1 at Buildtheaieconomy.substack.com, press
Changes
- Filed