GPT-5.1-Codex-Max is our new frontier agentic coding model built for long-running, project-scale work. It’s faster, more capable, and more token‑efficient than GPT‑5.1‑Codex, using compaction to work coherently across multiple context windows. You can use it in Codex surfaces today, including the CLI, IDE extension, cloud, and code review. Rates are the same as for GPT-5.1-Codex.
Learn more:GPT-5.1-Codex-Max