old guy question about limits

I'm so sorry to ask what is likely to be common knowledge, however, I'm trying to wrap my head around the offerings and I'm all jammed up. I asked this on r/Claude also - and my question was auto-blocked. I'm looking at Claude and ChatGPT and I can't really understand what the limits mean. "If you pay this amount, you get 6.25x MORE!" or tokens? I'm over my head and I haven't even gotten to the meat of it.