Verified70% confidenceFactExact time
On most Claude models, Anthropic bills cache reads at 0.1× the base input price; default 5-minute cache writes at 1.25×; 1-hour cache writes at 2×; and a 5-minute cache entry is refreshed for free each time it is used.
4
Sources
70%
Confidence
Medium-term (~90 days)
Relevance
10/12/2026
First Seen
Valid until: 1/10/2027
Sources
Related Entities
Related Claims
UnverifiedIn this audit, 85% of cache write tokens used 1-hour prompt caching, whose write unit price is higher than 5-minute caching; but reverse testing showed that switching everything to 5-minute caching would actually cost $1,781 more (+22.6%).80% similarVerifiedThe cache read mechanism retains the KV cache for recurring long prompt prefixes, charging at an extremely low rate upon a cache hit; the leaked cache read price for Opus 5.5 is approximately 1/20 of the input price.78% similarUnverifiedClaude's prompt caching is an optimization mechanism provided by Anthropic at the API level, where the price of cached read tokens is approximately one-tenth that of regular input tokens.73% similarUnverifiedThe actual extent of cache savings depends on the hit rate; if 80% of input hits the cache, the actual input cost is approximately 0.8 × cache price + 0.2 × regular price.73% similarUnverifiedA Prompt Caching cache hit read costs only 0.1 times the base input price, while the initial write cost is 2 times the regular input price.72% similar
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