Unverified60% confidenceFactExact time
OpenAI launched the Prompt Caching feature in 2024; when the prompt prefix is completely identical and exceeds the 1,024-token threshold, the KV Cache is reused, and the cached portion is typically billed at 25% of the original price or even lower.
2
Sources
60%
Confidence
Long-term
Relevance
7/18/2026
First Seen
Sources
Related Claims
UnverifiedPrompt 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79% similarVerifiedOpenAI Prompt Caching can reduce the cost of repeated prefixes to 10%–25% of the original price.78% similarUnverifiedOpenAI provides a Prompt Caching mechanism for models such as Codex, which allows reuse of previously computed KV cache when the prefix token sequence of a request is identical to a prior one, reducing the billing price for that portion (typically 50% or even lower than the normal price).78% similarUnverifiedPrompt Caching是Anthropic于2024年推出的服务端优化机制，实现约90%的Token折扣，要求前缀字节完全一致且达到约1024 Token的最低长度阈值72% similarUnverifiedPrompt Caching可将公共前缀的KV Cache持久化存储，成本可降至普通输入的10-20%71% similar
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