Dictionary term
Prompt Caching
ClaudeIntermediate
A Claude API feature that stores a reusable prefix of a prompt so repeated requests skip reprocessing it, cutting latency and cost for that cached portion.
In plain English
Claude can remember the long, unchanging start of your prompt, like a brand guide, so repeat requests run faster and you pay much less for that repeated part.
Analogy
Like a coffee shop remembering your usual order so it does not re-ask every visit.
Why it matters
Caching a long system prompt or knowledge base sharply lowers cost when your automation calls Claude repeatedly.
In practice
Caching a 10-page brand guide so each new request only pays full price for the new question.
Related terms
Sources
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