Switching models constantly invalidates prompt cache and doubles costs
Teknium · x · 2026-08-25
Teknium warns that constantly switching models in a session invalidates the prompt cache on the new model, forcing you to repay the full input token price for all context. This is a fundamental inference principle; avoid doing this unless the models are free.
Related event: Teknium: Switching Models Mid-Session Kills Prompt Caches and Doubles Costs(4 posts)→
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