No clue as i've not used Claude Code on Pro to get an idea of usage limits. But, if you get value out of Claude Code and ever run into limits, Max is quite generous for Sonnet imo. I have zero concern about Sonnet usage atm, so it's definitely valuable there.
Usage for Opus is my only "complaint", but i've used it so little i don't even know if it's that much better than Sonnet. As it is, even with more generous Opus limits i'd probably want a more advanced Claude Code behavior - where it uses Opus to plan and orchestrate, and Sonnet would do the grunt work for cheaper tokens. But i'm not aware of that as a feature atm.
Regardless, i'm quite pleased with Claude Code on $100 Max. If it was a bit smarter i might even upgrade to $200, but atm it's too dumb to give it more autonomy and that's what i'd need for $200. Opus might be good enough there, but $100 Opus limits are so low i've not even gotten enough experience with it to know if it's good enough for $200