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Prompt Cache Floors Are Per-Model, and the Cheap Model Has the Highest One

This story is from 2026-09-15. It is preserved in the archive; the latest stories are on the live feed.

Originally published on michael-kaminski.io . Fifty-three skill files load on this machine. All 53 clear Claude's prompt-cache floor on Opus 5. Twelve clear it on Haiku 4.5. Same files, same flag. Nothing changed but the model on the other end. The conclusion first: routing a workload to the cheape…

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  1. 2026-09-15 19:22 · DEV Community — AI
    Prompt Cache Floors Are Per-Model, and the Cheap Model Has the Highest One

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