Opus 4.7 Cost Impact Calculator
How much extra are Opus 4.7 bugs costing you? Calculate your hidden overhead.
Your Hidden Opus 4.7 Overhead
What's causing the overhead?
Opus 4.7 introduced multiple token inflation bugs that stack on top of each other:
- +20K hidden tokens per session from server-side inflation (#46917, 196 reactions)
- 1.7x system token bloat — 21.5K→36.7K on session start (#49356)
- ~4.7K per subagent spawn without cache_control (#50213)
- Cache destruction every turn via smoosh pipeline (#49585)
- cache_read at full rate instead of 1/10 discount (#49302)
Full analysis: Opus 4.7 Survival Guide (30 issues, 47+ GitHub bugs tracked)