Upgraded to the $100 plan thinking I had headroom. Started using Claude Opus 4.7 (new last week) heavily for a real build. Parallel sessions, long context windows, deep reasoning tasks. Hit 75% of my monthly limit in 2.5 days. Never came close before. 7 day reset cycle. Math is not mathing. This is the tax on actually building with AI versus dabbling with it. The people who use it hardest pay the most and hit limits the fastest. Not complaining, just noting: the cost structure of serious AI development is still being figured out by everyone including the people selling it. Back to Opus 4.6 which worked fine. Anyone else burning through limits faster than expected this week?