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Why a long idle pause costs you: Claude Code's prompt cache

This story is from 2026-10-26. It is preserved in the archive; the latest stories are on the live feed.

You leave a long Claude Code session for lunch, come back, type one short message, and the 5-hour meter jumps. Nothing went wrong: the prompt cache expired while you were away. After a pause, your next message re-sends the whole conversation as new tokens. New tokens count about 67 times as much ag…

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  1. 2026-10-26 03:39 · DEV Community — AI
    Why a long idle pause costs you: Claude Code's prompt cache

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