There are tools that let you extract out what the API price would be for a subscription plan use. I typically have monthly runs that are on the order of $2k - $4k at API prices, despite paying a mere $200/mo to Anthropic.

Edit: Just checked with ccusage and I've been doing about $450/day for the last week. A bit more than usual, but I still haven't come close to weekly limits and never hit the 5hr rate limit.