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Prompt cache TTL of 5 minutes creates inconsistent cache hits

4/10 Low

Anthropic's prompt caching has a 5-minute time-to-live, meaning low-traffic endpoints may not see consistent cache hits. Even minor whitespace changes invalidate cached prefixes, requiring exact matching across calls.

Category
performance
Workaround
partial
Stage
build
Freshness
persistent
Scope
single_lib
Upstream
open
Recurring
No
Buyer Type
team
Maintainer
active

Sources

Collection History

Query: “What are the most common pain points with Anthropic API for developers in 2025?3/30/2026

Prompt caching has a TTL. Cached prefixes expire after 5 minutes of inactivity. High-traffic endpoints benefit most. Low-traffic endpoints may not see cache hits consistently. ...Stale cache misses: Prefix changed slightly. Ensure cached prefix is identical across calls — even whitespace changes invalidate the cache.

Created: 3/30/2026Updated: 3/30/2026