My understanding is Claude has a pro version at 20 dollars a month that gets you more access and the expanded context window. Similar to ChatGPT pro. The pricing you and the other person who replied to you is probably talking about the API pricing which is on a per token basis (same with ChatGPT’s API pricing). I’ve heard for most people, using the API ends up being cheaper than paying for the pro, but it also requires you to know what to do with an API and I don’t have that technical ability. I pay for ChatGPT pro. I’ve used the free Claude chat interface, but I haven’t upgraded to the pro. I might try it out though, that big context window is pretty tempting even with a slight downgrade in the model quality.