Multi-step reasoning stories

Oct 22, 2026

Microsoft AI diagnostic tool outperforms doctors on complex medical cases

Microsoft researchers reported that an AI tool diagnosing patients step-by-step was more than twice as accurate as general physicians at solving complex medical cases, according to a study published in Science.

Oct 22, 20263 sources

Top claims

▪Microsoft's Diagnostic Orchestrator achieved an 80% accuracy score on emergency department patient cases from Beth Israel Deaconess Medical Center, compared to an average diagnostic accuracy of 47% for human physicians
▪On complex medical cases, Microsoft's Diagnostic Orchestrator increased OpenAI's GPT-5.5 accuracy from 72% to nearly 87%, though it yielded no diagnostic accuracy gains on emergency department cases
▪Microsoft currently sells dictation and radiology tools to clinicians and views its Diagnostic Orchestrator as an expansion of its healthcare product portfolio

Subtopics

AI applications1 AI capabilities1 AI in healthcare1 Clinical decision support1 Diagnostic medicine1 Differential diagnosis1 Microsoft1

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