Overview
Microsoft AI’s first in-house reasoning model: 35B-active sparse MoE (~1T total parameters).
Recent Developments
- Build 2026 announcement June 2, 2026
- Matches Claude Opus 4.6 on SWE-Bench Pro (vendor-reported)
- 97.0% AIME 2025, 94.5% AIME 2026
- 256K context; trained without third-party distillation
- Private preview on Microsoft Foundry