GPT-5.1-Codex-Max System Card

OpenAI released the system card for GPT-5.1-Codex-Max, a frontier coding model built for agentic tasks and real-world software engineering.

The model uses safeguards including safety training, sandboxing, and configurable network access, plus multi-context compaction for long-running work.

OpenAI says it falls below the High cybersecurity threshold, is treated as High capability in biology with safeguards, and is not High in AI self-improvement.

The release highlights how OpenAI is scaling long-horizon coding agents while tightening controls around security and bio-related risks.