You are mistaken. ChatGPT Health [1] is a model specifically designed for health applications and was co-developed with a benchmark suite, HealthBench [2], for testing against health conditions. This study suggests that the people working on HealthBench have some concerning external validity problems.
[1] https://openai.com/index/introducing-chatgpt-health/
[2] https://cdn.openai.com/pdf/bd7a39d5-9e9f-47b3-903c-8b847ca65...