The best answer would be to pull session stats from your harness and compare that against the limits. I think Anthropic publishes the limits of each plan.
If you’re using a pretty stock harness and not doing crazy multi-agent stuff with it, you’re probably fine.
My girlfriend built a whole (but simple) React app with it and only hit the limits of the $20 plan once. In fairness, she was trying to get it to clean up a bunch of 800ish line React files at once with a vague “make it look nice” prompt that she ran a few times. I think it was just churning for like half an hour straight before she burned all her credits.
It’s probably enough if you’re not on a fully agentic development strategy, it’s plenty to have it write tests and do comments and stuff, just not enough to continually have it doing giant refactoring passes.
Cursor's $20 a month plan provides a reasonable amount of Opus tokens as well.