OpenAI has just published the system card for the new programming agent GPT-5.1-Codex-Max. What does that mean for developers, product teams, and anyone who uses code in their daily work? I'll explain it clearly and practically for you.
What is GPT-5.1-Codex-Max
GPT-5.1-Codex-Max is OpenAI's latest bet for programming tasks with agentic capabilities. In other words, it doesn't just answer questions: it can plan and execute sequences of actions for complex software engineering, math, research, and more.
One of its key novelties is native training to work with multiple context windows through a process they call compaction. In practice, that lets it keep coherence when it has to process millions of tokens in a single task. Can you imagine asking it to review a large repo, follow the history of a PR, and generate documentation-related changes all in one flow? That's what they're aiming for.
