OpenAI · feature12-hour prompt caching

Valid from

2026-10-20

Valid until

still holds

Published

2026-10-20

Recorded by AsOf

2026-10-31

Checked

2026-10-31 · its source page states the value and the date

Confidence

0.70

Sources

“Oct 20 Feature v1/responses You can now choose 12-hour prompt caching in the API.”— what the page says, read 2026-10-31

• OpenAI API changelog, October 20, 2026primary · developers.openai.com · 2026-10-20

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