Mentioned in the evidence
- OpenAI Responses API
- prompt_cache_retention
- Organizations without Zero Data Retention
Official sources
- internal-test-m1577-prod-final-20261016 (changelog) ↗
For organizations without Zero Data Retention, the Responses API prompt_cache_retention default is in_memory.
- internal-test-m1577-prod-final-20261016 (changelog) ↗
The default remains dependent on organization retention policy.
- internal-test-m1577-prod-final-20261016 (changelog) ↗
For organizations without Zero Data Retention, the Responses API prompt_cache_retention default is 24h rather than in_memory.
This is a global change, verified against OpenAI’s own sources. It is not an assessment of your systems or your impact.