In plain words: Doctors scored an AI chatbot's answers to tough clinical cases and real emergency-room second opinions, comparing it with hundreds of physicians at three points in a patient's visit. The chatbot outperformed the physicians on every reasoning task, from diagnosis to treatment decisions.
Abstract · Superhuman performance of a large language model on the reasoning tasks of a physician
A seminal paper published by Ledley and Lusted in 1959 introduced complex clinical diagnostic reasoning cases as the gold standard for the evaluation of expert medical computing systems, a standard that has held ever since. Here, we report the results of a physician evaluation of a large language model (LLM) on challenging clinical cases against a baseline of hundreds of physicians. We conduct five experiments to measure clinical reasoning across differential diagnosis generation, display of diagnostic reasoning, triage differential diagnosis, probabilistic reasoning, and management reasoning, all adjudicated by physician experts with validated psychometrics. We then report a real-world study comparing human expert and AI second opinions in randomly-selected patients in the emergency room of a major tertiary academic medical center in Boston, MA. We compared LLMs and board-certified physicians at three predefined diagnostic touchpoints: triage in the emergency room, initial evaluation by a physician, and admission to the hospital or intensive care unit. In all experiments--both vignettes and emergency room second opinions--the LLM displayed superhuman diagnostic and reasoning abilities, as well as continued improvement from prior generations of AI clinical decision support. Our study suggests that LLMs have achieved superhuman performance on general medical diagnostic and management reasoning, fulfilling the vision put forth by Ledley and Lusted, and motivating the urgent need for prospective trials.
Peter G. Brodeur, Thomas A. Buckley, Zahir Kanjee, Ethan Goh, Evelyn Bin Ling, Priyank Jain, Stephanie Cabral, Raja-Elie Abdulnour, Adrian D. Haimovich, Jason A. Freed, Andrew Olson, Daniel J. Morgan, et al.
arXiv:2412.10849 · cs.AI, cs.CL · submitted Dec 14, 2024 · updated Jun 2, 2025
abstract · pdf
Cases like: - The AI replaces a salesperson but the sales are not binding or final, in case the client gets a bargain at $0 from the chatbot.
- It replaces drivers but it disengages 1 second before hitting a tree to blame the human.
- Support wants you to press cancel so the reports say "client cancel" and not "self drive is doing laps around a patch of grass".
- Ai is better than doctors at diagnosis, but in any case of misdiagnosis the blame is shifted to the doctor because "AI is just a tool".
- Ai is better at coding that old meat devs, but when the unmaintainable security hole goes to production, the downtime and breaches cannot be blamed on the AI company producing the code, it was the old meat devs fault.
AI companies want the cake and eat it too, until i see them eating the liability, i know, and i know they know, it's not ready for the things they say it is.