The other day I asked CC to plan using Opus a few small updates to a FastAPI backend & corresponding UI updates for a nextJS frontend. Then I had it implement using Sonnet. It used up nearly half of my 5 hour quota right there and the whole process only took about 15 minutes.

This is on the pro ($100/mo) plan?

I go through multiple sessions like this per day and it barely makes a dent. And I just keep it in Opus the whole time.

How is it possible that our experiences are so different with essentially the same task?

For reference, my current squeeze is about 30k sloc in Python, half being tests.

It's pro, but that's $25/mo. $100 is the lower tier of max.

Based on your other reply, seems like you're on Max5 plan ($100/m), not Pro ($20/m)

Just confirms that the Pro plan is not that usable for professional-level code wrangling

Agree. Just that it used to be, just not anymore after December update.