I was just surprised how well it did given my labs for the past 15 years. My hematocrit creeps up and I donate blood to get it back down. It was able to project % drop from a donation. Distinguish between the likely cause being a medication vs age. It looked at ferritin levels and other lab markers and recommended labs after every 3rd donation which was absolutely appropriate. The best part was it explains its rationale and it was spot on. If I just asked what causes hematocrit to go up I'd get a general answer. Give it actual data and it gave me an answer specific for my situation.
I was at an oral pathology lecture recently, all the clinical photos were from the presenter and not on the web. I was having fun taking pictures of slides and ChatGPT got the diagnosis correct on the first attempt about 90% of the time and the correct diagnosis was in the top 3 differential 100% of the time over about 50 slides. Some of these slides didn't show enough anatomical landmarks to even be sure what part of the body you were looking at and it still got them correct. As an example, this was carcinoma in situ caused by HPV-16 and it nailed it with just the picture.
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