Building more with GPT-5.1-Codex-Max

Introducing GPT-5.1-Codex-Max, a faster, more intelligent agentic coding model for Codex. The model is designed for long-running, project-scale work with enhanced reasoning and token efficiency.

Source: OpenAI ChatGPT — Published November 19, 2025 at 00:00 UTC — Category: Chatbots