Unverified50% confidenceFactExact time
OpenAI 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).
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/18/2026
First Seen
Valid until: 12/17/2026
Sources
Related Entities
Related Claims
UnverifiedOpenAI 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.78% similarVerifiedThe Prompt Caching mechanism can reuse the KV Cache of identical prefix contexts, typically reducing input token costs by 50%–90%.75% similarVerifiedOpenAI Prompt Caching can reduce the cost of repeated prefixes to 10%–25% of the original price.74% similarUnverifiedOpenAI的降价中基于Token的套餐用户积分在Codex里可以使用更久，而订阅自带的额度保持不变73% similarVerifiedOpenAI's API billing distinguishes between input tokens and output tokens, with output tokens typically priced higher.72% similar
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