I waited until off peak hours to use Opus 4.6 to do some research. One prompt consumed 100% of my 5h limit and 15% of my weekly usage. Even off peak it's still insane. Opus didn't even manage to finish what it was doing.
Even with Opus I don’t usually hit limits on the standard plan. But I am not doing professional work at the moment and I actually alternate between using the LLM and reading/writing code the old fashioned way. I can see how you’d blow through the quota quickly if you try to use LLMs as universal problem solvers.