Microsoft Decision-1: 9B Qwen Model Launch Explained

What happened: Microsoft introduced Microsoft-Decision-1 on October 9, 2026, a model built on Alibaba's Qwen3.5-9B that scores a fixed list of answer options in a single forward pass and returns a probability for each, rather than generating text. Why it matters: Microsoft named routing, classification, prioritization, verification and workflow control as core uses, and said it will soon rebase the model on other foundations, including Microsoft AI (MAI) and OpenAI. The coverage reviewed includes no independent reproduction of the benchmark or speed figures.

Microsoft introduced Microsoft-Decision-1 on October 9, 2026, a model built on Alibaba's Qwen3.5-9B that scores a fixed list of answer options in a single forward pass and returns a probability for each, rather than generating text.

Microsoft named routing, classification, prioritization, verification and workflow control as core uses, and said it will soon rebase the model on other foundations, including Microsoft AI (MAI) and OpenAI. The coverage reviewed includes no independent reproduction of the benchmark or speed figures.