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Why one message after a break eats your Claude Code usage limit

I measured 10,000 requests from my own sessions. Big contexts weren't the expensive part. The breaks were. Key findings When Claude Code's prompt cache expires, the first message back costs 12× to 80× a warm turn, depending on the model and whether the cache lasts 5 minutes or 1 hour. In 10,000 of…

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  1. 2026-11-13 00:13 · DEV Community — AI
    Why one message after a break eats your Claude Code usage limit

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