Following a week of major AI programming announcements from Microsoft and Google, OpenAI has joined in the fun. Today, OpenAI is announcing a new version of Codex , its programming focused AI model. While the announcement was today, the actual GPT 5.1 Codex Max capability will be available tomorrow in Codex for ChatGPT Plus, Pro, Business, Edu, and Enterprise users. API access is coming soon. OpenAI says the new Max model replaces GPT 5.1 Codex as the recommended model for agentic coding task
