Verified75% confidenceFactExact time
The cache is not permanently valid; providers usually have a TTL of a few minutes to an hour, and the hit rate fluctuates with user behavior.
5
Sources
75%
Confidence
Long-term
Relevance
10/13/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedPrompt caching has a TTL limit, and after a long period of idleness it needs to be warmed up again.76% similarUnverifiedThe cache TTL for the subscription version can stay warm for one hour, while the API call mode defaults to expiring after five minutes.76% similarVerifiedPrompt cache validity typically ranges from only a few minutes to several hours, and discount rates and cache windows may be adjusted at any time.76% similarUnverifiedTLS inspection proxies typically impose timeout limits on long-lived connections (commonly configured at 30–120 seconds), after which the connection is forcibly closed, interrupting the event stream.75% similarUnverifiedAnthropic's prompt caching lives for about five minutes by default (TTL), each hit refreshes the timer, and the cache expires if there is no request beyond its lifetime.72% similar
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