Unverified50% confidenceFactExact time
A 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.
1
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50%
Confidence
Long-term
Relevance
9/21/2026
First Seen
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Related Claims
UnverifiedPrefix Caching technology persistently stores already-computed KV vectors on the server side, allowing direct reuse when new requests share a large number of repeated prefixes with previous requests, with the matched portion billed at the cache price.77% similarUnverifiedThe 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.74% similarUnverified提示词缓存本质上是在KV缓存层面做持久化，将Transformer注意力生成的Key和Value张量保留供后续请求复用72% similarUnverifiedThe semantic caching tool GPTCache can reuse previous model outputs for similar user queries, avoiding repeated API calls.71% similarUnverified语义缓存（Semantic Cache）通过计算新查询与历史查询的向量相似度，超过阈值时直接返回缓存答案，GPTCache等开源工具实现了这一机制，通常与TTL机制结合70% similar
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