I have a text generation app where it will calls to an API to generate text.
So this app will be heavy on API calls.
My question is can the personal plan handle atleast 100 or even 50 users?
How much users should I expect can it handle?
100 users should be fine! Of course, if you are api workflow heavy, it may take a bit longer depending on how complex your app is.
You can use the server logs tab to test and experiment!