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How long is the cache stored for Claude sessions?

This story is from 2026-09-12. It is preserved in the archive; the latest stories are on the live feed.

In a typical claude code session, how long does Anthropic store the cache of the last inference? Is it 5mins or 15mins or 1hour? And does it mean I better give my reply or the next prompt within this time frame to save on inference cost or tokens usage? With a ~1million context window I reckon this…

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  1. 2026-09-12 16:04 · r/ClaudeAI
    How long is the cache stored for Claude sessions?

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