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A study shows that medical chatbots, including ChatGPT and Gemini, provide incorrect diagnoses in 80% of cases without complete information.

Lara Maior
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14 April 2026, 06:57
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A study conducted by Mass General Brigham in Massachusetts, published in Jama Network Open, highlighted that common chatbots, such as ChatGPT and Gemini, make incorrect diagnoses in over 80% of cases when they do not have sufficient information about patients. The study tested 21 language models, including those developed by OpenAI, Anthropic, Google, xAI, and DeepSeek, using 29 clinical vignettes based on reference medical texts. Even when they had access to complete information, the chatbots had an error rate of over 40%, although in some cases they managed to provide the correct diagnosis for 90% of patients. The conclusion of the experiments is that the performance of these models significantly depends on the volume of available information, and hallucinations, that is, the invention of information, remain a major problem in generating correct responses.

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Studiu: Chatboţii dau un diagnostic greşit în 80% din cazurile medicale iniţiale
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Cotidianul
Diagnosticul prin AI, un risc: 80% rată de eșec

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