Microsoft finishes pre-training MAI-Base-2, its next in-house foundation model

The successor to MAI-Base-1 has cleared its most compute-heavy phase as Microsoft builds out its own AI stack Microsoft has finished pre-training MAI -Base-2, the next foundation model from its in-house AI group. Pre-training is the most compute-intensive stretch of building a large language model. It produces the raw intelligence, not the polished product, and it signals that Microsoft’s homegrown AI effort is moving into its second generation. Think of pre-training as a model’s undergraduate degree. It reads a vast library of text and learns to predict what comes next, picking up grammar, facts and patterns along the way. What it can’t do yet is follow instructions gracefully or reason through a problem on request.

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