Unverified50% confidenceOpinionExact time
The community speculates that the 54-minute idle threshold very likely reserves buffer time to complete compaction before the cache TTL expires, but since the official documentation has not disclosed the specific TTL value or derivation formula, this is a reasonable inference.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/17/2026
First Seen
Valid until: 1/15/2027
Sources
Related Entities
Related Claims
UnverifiedCommunity analysis speculates that the 54-minute idle threshold is related to the cache lifetime, with the goal of completing compaction before the cache expires, but the official documentation does not clearly explain how this number was derived.79% similarUnverified缓存命中时prefill阶段可跳过已缓存部分，TTFT可从数秒压缩至毫秒级73% 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.71% similarUnverifiedWhen current mainstream large models handle complex code tasks, the time to first token (TTFT) is often between 2 and 8 seconds.71% similarVerifiedTime to First Token (TTFT) refers to the time interval between a user sending a request and the model outputting the first token, and is primarily constrained by the duration of the prefill stage.69% similar
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