'Change in technology that will reshape medicine': Leading medical experts say new AI reasoning models are so good they outperform even the best specialist doctors when it comes to diagnosing some of the world's most mysterious cases

AI is catching rare diseases earlier than doctors - but there’s a catch

by · TechRadar

News By Efosa Udinmwen published 6 May 2026

(Image credit: AI Generated)

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  • AI models identify rare diseases faster than many experienced clinicians
  • Systems reach correct or near diagnoses in the majority of difficult cases
  • Models analyze symptoms and test data using structured reasoning processes

A new generation of AI tools is claiming to outperform experienced clinicians in diagnosing rare and complex medical conditions.

These reasoning models can process long chains of symptoms, test results, and clinical notes, then propose or narrow down the correct diagnosis faster than many human specialists.

Some researchers argue that this represents a profound change in technology that will reshape medicine, especially for cases where the correct diagnosis is not obvious even after extensive evaluation.

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AI models tackle tough diagnoses

“We’re witnessing a really profound change in technology that will reshape medicine,” Arjun Manrai of Harvard University said in a news conference.

Still, serious questions remain about whether these systems can handle the full weight of real-world clinical uncertainty.

In one major study, researchers tested a leading AI reasoning model on a mix of textbook-style cases and real patient data from a Boston emergency department.

The model analyzed step-by-step descriptions of symptoms, test orders, and results, just as clinicians do.

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