# clm_302B707A8DE6

subject: OpenAI (/record/openai.md)  
predicate: feature_added  
value: extended prompt cache retention  
valid_from: 2025-11-13  
valid_to: null  
published: 2025-11-13  
recorded: 2026-11-01  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-01  
checked: 2026-11-01 · its source page states the value and the date  

> Nov 13 Feature Released extended prompt cache retention . Extended prompt cache retention keeps cached prefixes active for longer, up to a maximum of 24 hours.

What https://developers.openai.com/api/docs/changelog#2025-11-13 says, word for word.

## Sources

- https://developers.openai.com/api/docs/changelog#2025-11-13 (primary, OpenAI, published 2025-11-13)

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AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.