Mermaid has been nice to use. It's very much in a beta phase still, with some odd quirks and missing documentation. I'm excited to see where it will be in a year's time.
Anyway, I think that mermaid.js have an advantage there in a lot of environments as it is supported by a lot of markdown renderers, I would like that ChatGPT one does that too.
yup but ... right now things are in a bit of a primitive state.
i have tried a lot of stuff with the ChatGPT Wolfram integration and it just fails all kinds of ways. its really cool when it works, but a lot of time it just gets really confused and cannot do basic things like "make that line black instead of red"