# OpenAI Unveils GPT-5.1-Codex-Max for Advanced Coding Projects

OpenAI has announced GPT-5.1-Codex-Max, a significant upgrade to its Codex coding assistant that promises to transform how developers tackle large-scale software projects.

The new model represents a major leap forward in AI-assisted programming. Unlike previous versions, GPT-5.1-Codex-Max is specifically engineered for "long-running, project-scale work," meaning it can handle entire codebases rather than just individual functions or files. This makes it particularly valuable for professional developers working on complex applications.

Key improvements include faster processing speeds, enhanced reasoning capabilities, and better token efficiency. The token efficiency upgrade is especially important—it means the model can work with larger amounts of code while using fewer computational resources, potentially reducing costs and improving response times.

OpenAI describes the model as "