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Claude Prompt Caching Hit 0 of 1,412 Calls: A Timestamp Killed It

This story is from 2026-10-24. It is preserved in the archive; the latest stories are on the live feed.

I turned on Claude prompt caching, shipped it, and moved on to the next thing. A week later I opened the usage logs to admire my savings. cache_read_input_tokens: 0 . On every call. 1,412 calls in a row. The API never returned an error. My cache_control blocks looked fine. Every request quietly pai…

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  1. 2026-10-24 23:41 · DEV Community — AI
    Claude Prompt Caching Hit 0 of 1,412 Calls: A Timestamp Killed It

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