Unverified50% confidenceFactExact time
OpenAI's official example shows that one write plus nine full reads totals 2.15× the prefix input price, compared to 10× without caching.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/12/2026
First Seen
Valid until: 1/10/2027
Sources
Related Entities
Related Claims
UnverifiedA 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.76% similarUnverifiedFor applications that heavily rely on context reuse, the $0.10 cached read price is the primary source of cost savings.73% similarUnverifiedIn GPT-5.6 and later, OpenAI charges 1.25× for cache writes and 0.1× the uncached input rate for cache reads, with a minimum cacheable prefix of 1,024 tokens.72% similarUnverifiedOpenAI typically charges 4–6 times more for output tokens than input tokens, because the computation involved in generation far exceeds that of comprehension.71% similarUnverifiedThe cost of cache reads should, by industry convention, be approximately one-tenth that of regular input tokens.71% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/1002839API
curl https://kongchang.com/api/v1/knowledge/claims/1002839MCP
get_claim(id=1002839)