Microsoft launches a decision model built on Alibaba’s Qwen
Microsoft has released Microsoft-Decision-1, a small model that picks between fixed answer options instead of writing text. Microsoft built it on Alibaba’s open-weight Qwen3.5-9B and then post-trained it, according to the Foundry model card.
Achint Srivastava, a vice president of software engineering in Microsoft’s Office of the CTO, announced the model in a blog post on 9 October. Microsoft will soon rebase it on other models, including OpenAI’s and its own MAI models, he wrote. The post does not say why.
“Decision models are quickly emerging as an important new category in AI,” Srivastava wrote.
What the model does
Given a fixed set of options, Microsoft-Decision-1 returns a calibrated probability score for each one. It handles yes or no questions, multiple choice and ratings. It can also grade AI responses and agent actions against a rubric.
Microsoft lists uses such as routing, classification, prioritisation, verification and workflow control....
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