You can't cut an LLM bill you don't measure: a 40-line stdlib per-call cost ledger in Python
This story is from 2026-09-28. It is preserved in the archive; the latest stories are on the live feed.
Most teams find out what their LLM features cost when the monthly invoice arrives. By then you can't say which feature, prompt, or retry loop spent the money. The fix is not a dashboard product. Start by writing one line per call to an append-only file, and tag each line with why the call happened.…
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- 2026-09-28 10:05 · DEV Community — AI
You can't cut an LLM bill you don't measure: a 40-line stdlib per-call cost ledger in Python