Verified65% confidenceFactExact time
The 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.
3
Sources
65%
Confidence
Long-term
Relevance
9/23/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedCached input tokens typically enjoy a discount of 25%–50% off the original price, as there is no need to recompute embeddings and attention weights—only the precomputed KV vectors need to be loaded from cache.77% similarUnverifiedIn frameworks where prompt caching is already enabled, the unit price for cache hits is only 1/50 that of new input, so cost savings are limited when the volume of judgments is not large.76% similarUnverifiedFor applications that heavily rely on context reuse, the $0.10 cached read price is the primary source of cost savings.75% 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.74% similarUnverifiedPrompt Caching在提示词前缀完全相同且超过约1024 token阈值时命中，缓存token通常按原价的25%甚至更低计费73% similar
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