You don't need a max subscription to use Claude Code. By default it uses your API credits, and I guess I'm not a heavy AI user yet (for my hobby projects), but I haven't spent more than $5/month on Claude Code the past few months.
They're good about telling you how full your context is, and you can use /compact to shrink it down to the essentials.
But for those of us who aren't Mr. MoneyBags like you all, keeping an eye on context size is key to keeping costs low.