Microsoft Built Its Own Reasoning Model Without Touching OpenAI's Data

Microsoft unveiled its new MAI-Thinking-1 reasoning model at Build 2026, emphasizing that it was developed entirely from scratch, using only commercially licensed data and no elements from third-party models, notably avoiding any use of data from or influence by OpenAI. This move underscores a shift in Microsoft's approach to AI development, prioritizing independent innovation and clear separation from partnerships that could raise ethical or legal concerns. By highlighting the model's independence, Microsoft signals its commitment to maintaining a distinct identity in the competitive AI landscape.