Microsoft launched Microsoft-Decision-1, a new AI model optimized for structured decision-making, built on Qwen3.5-9B. It achieved top accuracy in 36 benchmarks with high speed and low decision reversal rates. The model assigns probability scores to options, ideal for routing and classification tasks integrated into workflows. Priced at $0.042 per million input tokens with free output, it offers cost-effective performance comparable to larger models. Now available on Microsoft's AI platform, it will soon be accessible via OpenRouter for broader developer adoption.