It’s hard to say, since I was writing the blog post in parallel as I was making the app. But not too long, maybe an hour or two? I’m not a Python/Flask developer, so I guess that’s not too bad.
Why would I want to read a blog post written by an AI about a program written by an AI besides novelty? The moment an input in a medium becomes primarily AI-generated is the moment I stop using said medium.
I have a non-AI code generator if that would be of interest to your info gathering. It's definitely meant for developer efficiency over the entire software lifecycle. Happy to tell you all about it if you are doing interviews, calls, or the similar.