My hunch is that this is exactly what he was expecting. There is a lot of hype around ChatGPT passing the medical exam and this exercise is a counter point to that.
With a subscription you can use GPT-4 with ChatGPT. ChatGPT is just the wrapper to the model.
- Legacy (GPT-3)
- Default (GPT-3.5)
- GPT-4
The article really tells us more about the experience of someone with no chatgpt knowledge checking their own symptoms rather than its usability for emergency diagnosis.