AI news · Microsoft · health AI
Microsoft says its AI beat generalist doctors on hard cases
In a study published in Science, MAI-DxO reached the right diagnosis in 83 per cent of complex cases, against 36 per cent for doctors using references.
Microsoft AI says its diagnostic system, MAI-DxO, solved hard medical cases far more often than generalist doctors, in a study published in Science on Thursday 22 October 2026, according to the company. Chief executive Mustafa Suleyman called it a step towards “medical superintelligence”, TechCrunch reports.
MAI-DxO seats several AI agents around one simulated patient, like a hospital case conference. They ask questions, order tests and challenge each other’s diagnosis over several rounds, pricing each test as they go. On the hardest New England Journal of Medicine cases it was right 83 per cent of the time. Generalist doctors got 22 per cent right alone and 36 per cent with reference materials.
Specialists and physician teams, who usually take cases this hard, were left out of the comparison, TechCrunch notes. Much of the gain comes from the underlying model: MAI-DxO did best on OpenAI’s GPT-5 and GPT-5.5, and on GPT-5 the panel set-up added about four points of accuracy while cutting the estimated cost per case by about $3,000.
Microsoft’s 83 per cent was measured against generalists on simulated patients, and most of it came from the model underneath, so it says nothing yet about the specialist teams who usually take such cases.
Sources
- Microsoft AI: Building medical superintelligence. Checked
- TechCrunch: Microsoft’s Mustafa Suleyman says its AI outperforms doctors on hard cases. Checked
Alexandre S.
Alexandre S. is a creative ad strategist and copywriter with ten years' experience in digital marketing across multiple channels.
More AI news from
- Meta’s new terms leave advertisers liable for its AI ad edits
- Canva launches Craft, an image model trained on its templates
- OpenAI nears a $30 billion round at a $1.25 trillion valuation
- Walmart gives AI shopping agents their own spending limits
- Nearly 10 million advertisers used Meta’s AI ad tools, Meta says
- New Performance Max campaigns pull images from your site
- Gemini adds a small-business hub that keeps images on brand
- Anthropic hands Agent Skills to the Agentic AI Foundation
- 1Password lets AI agents sign in without seeing your password