Prompt Caching: Put the Stable Stuff First (and Stop Paying Twice for the Same Tokens)
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Most LLM apps send the same few thousand tokens on every request: the tool definitions, the system prompt, a block of reference docs, a handful of examples. Only the last few hundred tokens, the user's actual message, change. Without caching, you pay full input price to reprocess that identical pre…
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- 2026-10-12 03:37 · DEV Community — AI
Prompt Caching: Put the Stable Stuff First (and Stop Paying Twice for the Same Tokens)