codex max

Codex Max is OpenAI's flagship agentic coding model for Codex, designed for long-running engineering projects. It offers dramatic token efficiency gains and an explicit training signal to operate inside Windows environments and the Codex CLI. The model can manage project-scale tasks by compacting context across multiple windows, working with millions of tokens in a single run. It runs significantly faster on real-world engineering workflows and is available in Codex for ChatGPT paid plans, with API access following soon. Discussions on WindowsForum cover its capabilities, Windows-native operation, and implications for developers using Microsoft tools.