It's pretty easy to hit a couple hundred dollars a day filling up Opus's context window with files. This is via Anthropic API and Zed.
Going full speed ahead building a Rails app from scratch it seemed like I was spending $50/hour, but it was worth it because the App was finished in a weekend instead of weeks.
I can't bear to go in circles with Sonnet when Opus can just one shot it.
Anthropic via Azure has sent me an invoice of around $8000 for 3-5 days of Opus 4.1 usage and there is no way to track how many tokens during those days and how many cached etc. (And I thought its part of the azure sponsorship but that's another story)
The $200/month Max plan has limits, but making a couple of those seems way cheaper than $50/hr for the ~172 hrs in a month.