Unverified50% confidenceFactExact time
Anthropic'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.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/14/2026
First Seen
Valid until: 1/12/2027
Sources
Related Entities
Related Claims
UnverifiedCache entries have a validity period of approximately 5 minutes (default) to 1 hour (extendable), after which they are treated as cache misses.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.75% similarUnverifiedThe 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.72% similarUnverifiedPrompt cache validity typically ranges from only a few minutes to several hours, and discount rates and cache windows may be adjusted at any time.69% similarUnverifiedMainstream large model API providers typically maintain prompt caches in units of 5 minutes to 1 hour, after which they expire.69% similar
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