Microsoft Unveils MAI-Base-2, 2.8T-Parameter MoE Base Model

Microsoft AI unveiled MAI-Base-2, a fully in-house 3T-parameter MoE base model with 80B activated parameters trained on 50T tokens. Mustafa Suleyman announced it achieves SOTA on multiple held-out evaluations with pre-training efficiency several times better than DeepSeek, with post-training results coming soon.

2026-10-16 ~ 2026-10-16 · 3 related posts

• Microsoft MAI claims SOTA 3T-param in-house base models, post-training results coming — soldni · 2026-10-16
• Microsoft unveils MAI-Base-2: 2.8T-param MoE, 4-12x more pre-training FLOP-efficient than DeepSeek — ChengleiSi · 2026-10-16
• Microsoft unveils in-house 3T-class MAI base models: 80B active params, 50T training tokens detailed — SinclairWang1 · 2026-10-16