Verified65% confidenceFactExact time
Prompt caching saves the KV state of reusable prefixes (the tokens at the beginning of a prompt that remain unchanged); if the next request starts with an identical prefix, the provider reuses the saved computation and only processes the new portion.
3
Sources
65%
Confidence
Long-term
Relevance
10/12/2026
First Seen
Sources
Related Entities
Related Claims
VerifiedThe core principle of prompt caching is cross-request reuse of the KV Cache, where already-computed KV states can be cached and reused when multiple requests share the same prefix.79% similarUnverifiedPrompt caching reuses already-computed KV cache on the server side and requires the context prefix of the previous request to be identical to the current one.76% similarUnverifiedA cache hit means the model server recognizes that the prefix of the current request highly overlaps with a previous request, and directly reuses the already-computed KV cache without re-running inference, thereby reducing the actual computation load.75% similarVerifiedKV Cache通过将已计算的键值对持久化存储，使相同Prompt前缀的后续请求可直接复用，跳过重复的矩阵运算75% similarUnverifiedPrompt caching is a capability of the Anthropic API: when the prefix portion of a request is exactly identical to the previous request, the server can reuse the already-computed intermediate state and skip redundant prefill computation.74% similar
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