CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins89% CONFIDENCEOverall confidence: 89%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better358 days ago
Dated from the release notes leave this entry undated; the Codex changelog dates GPT-5-Codex-Mini's introduction Nov 7, 2025[1]OpenAI adds GPT-5-Codex-Mini, a smaller, cheaper GPT-5-Codex with about 4x more usage, to the Codex CLI and IDE extension.