OpenAI: 12-hour prompt caching option added; 12-hour cache writes cost 2.5x the input token price.
| Product | OpenAI API (prompt caching) |
|---|---|
| Category | pricing |
| Announced / detected | 2026-10-20 |
| Effective | not stated in source |
| Before | No 12-hour caching option (not stated) |
| After | 12-hour caching available; writes at 2.5x input price |
| Official source | https://platform.openai.com/docs/changelog |
| Source quote | 12-hour cache writes cost 2.5x the input token price. |
| Archive | No post-change Wayback capture found |
| Snapshot hash | sha256:fdd795b8161cf6be325740e2523291f43a334ec87f6ee952114f7c455c926394 |
| Status | verified |