{"id":"tp-36613","type":"article-newspaper","title":"OpenAI Adds 12-Hour Minimum Prompt Cache for GPT-5.6 and Later","author":"Simon Yoon","publisher":"TOKENPOST Inc.","url":"https://www.tokenpost.com/news/technology/36613","datePublished":"2026-10-21T11:38:09.000Z","dateModified":"2026-10-21T11:38:09.000Z","language":"en","abstract":"The longer API setting costs 2.5 times the standard input rate to write. Signed-in Codex and ChatGPT Work users also retain cached context indefinitely.","section":"Technology","references":[]}