I easily burn through 3 $200 plans in less than a week. I am often using 4-6 sessions at once and do run overnight goals though typically 2 at once. Almost never use fast.
Claude plans are more generous now by about 2-3x but Anthropic slowed their tps a month or so ago so you’re not getting the speed. It’s flip flopped, Codex tightened it significantly recently and used to be more generous.
I do split between work, personal and OSS projects, which is why I have the plans.
This has been my experience as well, at least for the last few weeks. Codex 5.5 is the better planner and coder across big projects, but Opus is fine, though my Claude 5 hour window lasts ~2x longer than Codex. So I’ll sometimes use an orchestrator/worker skill to spread the load.