OpenAI’s new GPT‑5.1-Codex-Max — all about the agentic coding model that can work for long hours
OpenAI this week rolled out GPT-5.1-Codex-Max, a new agentic coding model, built for long-running and detailed software development tasks.
Described as “faster, more intelligent, and more token-efficient at every stage of the development cycle,” the new model is available across all Codex surfaces.
