Unverified50% confidenceFactExact time
Cache Read is a billing and optimization mechanism in large language model APIs: when the prefix of a request is exactly identical to that of a previous request, the provider can directly reuse the already-computed key-value cache (KV Cache) without rerunning attention computation.
1
Sources
50%
Confidence
Long-term
Relevance
10/23/2026
First Seen
Sources
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Related Claims
VerifiedIn 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.78% similarUnverifiedPrompt Caching is a mechanism provided by large-model service providers such as the Anthropic API: when the request prefix is exactly the same as that of a previous request, the server reuses the already-computed KV Cache, the cache-hit portion is billed at 0.1 times the input price, and the first cache write is billed at 1.25 times.74% similarUnverifiedCache reuse is a cost optimization mechanism for large language model API calls; when the prefix of a request matches a previous request, the already-computed KV cache can be reused, skipping redundant computation and reducing latency and cost.72% 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.72% similarVerifiedThe 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.71% similar
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