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I priced my side project's LLM bill in 20 lines of JavaScript — here's the token math

This story is from 2026-10-30. It is preserved in the archive; the latest stories are on the live feed.

I priced my side project's LLM bill in 20 lines of JavaScript — here's the token math Adding an AI summary feature to a side project cost me $156 a month at a volume I would have guessed was "basically free." The formula behind that bill fits in one function. The part I got wrong was not the formul…

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  1. 2026-10-30 19:24 · DEV Community — AI
    I priced my side project's LLM bill in 20 lines of JavaScript — here's the token math

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