I'm confused as to how pricing works. For home projects, I almost exclusively use the web chat interface to code. I haven't done anything large yet so I will i

I'm confused as to how pricing works. For home projects, I almost exclusively use the web chat interface to code. I haven't done anything large yet so I will iterate and get the web chat to update code, print out the code that I copy and paste. How does this differ in terms of pricing than Codex?