Verified65% confidenceFactExact time
In the Prompt Cache mechanism, when the prefix content of an API request is identical to a previous one, the system reuses the already-computed KV cache to complete cache reads at a lower price, while cache write is the billing item for the first time content is written into the cache.
3
Sources
65%
Confidence
Long-term
Relevance
7/10/2026
First Seen
Sources
Related Claims
UnverifiedAnthropic's prompt caching feature allows caching of repeatedly occurring system prompts or code files to reduce input token costs.76% similarVerifiedPrefix 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.75% similarUnverifiedvLLM的前缀缓存（Prefix Caching）对KV Cache块计算哈希值，当新请求输入前缀与已缓存请求重叠时直接复用物理缓存块，跳过该部分prefill计算75% similarUnverifiedPrompt Caching refers to LLM service providers caching repeatedly occurring prefix content in requests, with cache hits reducing computational cost and latency.74% similarUnverifiedThe KV Cache (Key-Value Cache) mechanism allows API requests sharing the same prefix to reuse already-computed Key and Value vectors, thereby significantly reducing inference costs.74% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/452333API
curl https://kongchang.com/api/v1/knowledge/claims/452333MCP
get_claim(id=452333)