Unverified50% confidenceFactExact time
Prompt 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.
1
Sources
50%
Confidence
Long-term
Relevance
10/14/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedCaching 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.76% similarUnverifiedImplementing retry logic with exponential backoff at the API call layer and caching results of high-frequency requests can provide a buffer during brief service fluctuations.76% similarUnverifiedMany modern APIs use an asynchronous processing architecture where write requests first enter a message queue, the server returns 200 to confirm the request has been queued, and the actual persistent write is completed asynchronously in the background—a phenomenon known as eventual consistency.75% similarUnverifiedPrompt 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.74% similarUnverifiedPolling is when a program repeatedly queries an external data source or API at fixed intervals to determine whether the state has changed; its advantage is simplicity and not depending on the other party supporting callbacks, and its cost is generating invalid requests and introducing latency.74% similar
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