Microsoft AI Completes MAI-Base-2 Pre-Training

Microsoft AI announced it finished pre-training MAI-Base-2, a new MoE foundation model with 80 billion active and 2.8 trillion total parameters. It outperforms every open-weight model tested on held-out evaluations and is 4-12x more pre-training FLOPs-efficient than DeepSeek-V4-Pro-Base.

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