Prompt Caching: The 90% Discount You're Missing
This story is from 2026-10-18. It is preserved in the archive; the latest stories are on the live feed.
Originally published at API Cost Lab . There is a 90% discount sitting in your API bill, and most developers are either not using it or using it in a way that doesn't work. Prompt caching — paying a tenth of the input price for tokens the provider has already seen — is the highest-leverage cost opt…
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- 2026-10-18 10:16 · DEV Community — AI
Prompt Caching: The 90% Discount You're Missing