Verified65% confidenceSolutionExact time
Caching means pre-storing recurring system prompts or long documents so that subsequent requests reuse them at a lower unit price, suitable for multi-turn Q&A or fixed knowledge base scenarios.
3
Sources
65%
Confidence
Long-term
Relevance
10/14/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedPersistent KV caching serializes key-value vectors to disk or object storage, allowing historical context across sessions and requests to be loaded directly, bypassing recomputation.78% similarVerifiedPrompt Caching refers to LLM service providers caching repeatedly occurring prefix content in requests, with cache hits reducing computational cost and latency.76% 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.76% similarUnverifiedA prompt cache hit requires the request prefix to be byte-for-byte identical to what was written at cache time; mixing dynamic content such as timestamps or session IDs into system prompts will cause frequent cache invalidation.75% similarVerifiedIn 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.74% similar
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