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Got hit with a $212 API charge from Claude Opus out of nowhere (my fault for not setting a limit). Shocked me how fast a small project could cost that much (I think it was from the context buildup across turns).

Went looking for a tool that could estimate costs before sending anything and stumbled on Calcis. Seems pretty neat, only explored it a bit so far, mainly just the estimator before I hit a usage limit.

Basic stuff is free, some features are behind a paywall but what I tried worked well enough.



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