Microsoft Launches Decision-1: Fast Decision-Scoring Model Built on Qwen3.5-9B

Microsoft launched Decision-1 on October 9, 2026, a decision-scoring model based on Qwen3.5-9B for routing, classification, and workflow control. Available via Microsoft Foundry and OpenRouter, it provides calibrated probabilities for fixed options. In an OpenRouter benchmark of 14 models using 82 questions, Decision-1 ranked 6th with 75 correct answers and a median response time of 0.472 seconds. Perplexity Decider V1.1 27B led the test with 80 correct answers, while Kev 4B matched its cloud score locally.