OpenAI Prompt Cache Diagnostics is generally available in the Responses API
Tech · Releases · Tue, September 8, 2026
For GPT-5.6 and later, developers can compare cache reuse against a previous response, see reasons for cache misses and follow guidance to improve cache hit rates.
Every year
Also on Sep 8, 2026
| Date | Event | When |
|---|---|---|
| Tue, Sep 8, 2026 | 300th anniversary: J. S. Bach led the first performance of Geist und Seele wird verwirret, a solo... | 17 days ago |
| Tue, Sep 8, 2026 | International Literacy Day | 17 days ago |
| Tue, Sep 8, 2026 | Minneapolis Public Schools first day 2026-27 | 17 days ago |
| Tue, Sep 8, 2026 | Saint Paul Public Schools first day 2026-27 | 17 days ago |
Source, method and history
- Source
- openai
- How we know
- From the Releases API (releases.fru.dev), which reads each vendor's changelog.
- Who
- openai
- Recurs
- one-off
- More on fru.dev
- releases.fru.dev
- Feed
- Subscribe to Releases
- Changes
- 2026-09-25: added to 2026-09-08