OpenAI Blog · Nov 19, 2025
Building more with GPT-5.1-Codex-Max
Reviewed by Errol Vogt, Site support technician & online learning analyst · original summary · editorial policy
Building more with GPT-5.1-Codex-Max. Introducing GPT-5.1-Codex-Max, a faster, more intelligent agentic coding model for Codex. The model is designed for long-running, project-scale work with enhanced reasoning and token efficiency. This update is relevant for small-office operators tracking changes in their tools.
Operator takeaway: For operators: review whether 'Building more with GPT-5.1-Codex-Max' affects your current setup before relying on it in production.