Microsoft Releases Decision-1: Post-trained on Qwen3.5-9B for High-Accuracy, Fast Decisions

Microsoft has launched Microsoft-Decision-1 on OpenRouter, a model post-trained from Qwen3.5-9B. The company claims it achieves the highest accuracy across 36 blind benchmarks (~150K questions), runs 4.5x faster than the runner-up and 35x faster than GPT-6 Sol, with only a 1.3% decision flip rate under perturbed inputs. Pricing is set at $0.042 per million tokens.