Unverified50% confidenceFactExact time
In the session assumed by the article, a gateway labeled "50% off" but with cache reads at only a 20% discount and cache writes at full price actually gives a 28% discount, costing $12.13.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/13/2026
First Seen
Valid until: 1/11/2027
Sources
Related Entities
Related Claims
UnverifiedThe cost of cache reads should, by industry convention, be approximately one-tenth that of regular input tokens.78% 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% similarUnverifiedCached 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.73% similarUnverifiedIf a vendor offers a discount of more than 23% on both cache reads and cache writes, its "50% off" badge can match a uniform 35%-off plan.72% 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.72% similar
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