Same PM workflow as my $750/mo era. Anthropic fixed 3 bugs. The 4 root causes still on your side, with copy-paste templates.
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I'm on Claude Code Max (20x). 3 days in. 12% used. Same workflow that cost me $750/mo (Max 20x + extra usage) a month ago. No model swap, no skipped sessions.
Between March 23 and April 23, some users on Max burned weekly quotas in 1-2 days. Anthropic shipped 3 bug fixes (v2.1.116+) and reset all subscriber limits. Full writeup in their
View Tweet.
Four root causes still on your side:
1. Cache misses
1. Context bloat
1. Wrong model or effort
1. Wrong input format
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# 1. Cache Misses
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The prompt cache is the single biggest lever in Claude Code. Most people never look at it.
The math:
• Cache read: 0.1× the input price
• Cache write (5-min TTL): 1.25×
• Cache write (1-hour TTL): 2×
• Cache refresh on hit: free (charged at the read price)
Every hit on a cached prefix resets its TTL at no extra cost. So a long session with steady tool use stays warm indefinitely as long as the prefix doesn't change.
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