The Same 8,514-Token Prompt Bills 0.1113x or 1.2474x — an 11.21x Gap From One 14-Token Line Moving
This story is from 2026-09-17. It is preserved in the archive; the latest stories are on the live feed.
Providers cache your prompt by exact token-prefix match . What you get back is the longest common prefix between this request and the cached one, and nothing after the first difference — however stable the rest of it is. So one volatile line decides the bill. Take a 14-token Current date: … , which…
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- 2026-09-17 12:31 · DEV Community — AI
The Same 8,514-Token Prompt Bills 0.1113x or 1.2474x — an 11.21x Gap From One 14-Token Line Moving