Outlook Business Desk
OpenAI has launched GPT-5.1-Codex-Max, a new coding model designed for long and detailed development tasks. It promises faster performance, smarter outputs, and better efficiency across demanding engineering workflows.
GPT-5.1-Codex-Max runs on the GPT-5.1 architecture and is trained on practical engineering tasks, from reviewing code and preparing pull requests to building websites and answering technical queries with stronger accuracy.
This version runs properly on Windows for the first time and is improved for use with the Codex command-line tool, making everyday development tasks smoother and more dependable for users.
OpenAI says the model can operate on its own for long stretches. During tests, it kept refining code, correcting errors and finishing tasks even when the assignment lasted over twenty-four hours.
OpenAI chief executive officer (CEO) Sam Altman praised the team’s rapid progress, saying the model is already performing well and will keep improving as the company builds more advanced coding tools.
The model is accessible to users on ChatGPT Plus, Pro, Business, Edu and Enterprise plans. Developers using the Codex command-line tool will receive access once API support is introduced.
In tests, GPT-5.1-Codex-Max delivered better accuracy than earlier models while using fewer thinking tokens. This improved efficiency lowers costs for developers and makes handling complex coding tasks quicker and smoother.