GPT-5.1-Codex-Max Released
CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins90% CONFIDENCEOverall confidence: 90%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 betterOpenAI's[1][2][3] own model release notes date this entry November 19, 2025
OpenAI releases GPT-5.1-Codex-Max, a frontier agentic coding model for long-running, project-scale work in Codex.