GPT-5.2 System Card Addendum: GPT-5.2-Codex

GPT-5.2-Codex is a state-of-the-art agentic coding model designed for complex, real-world software engineering.

Through context compaction technology, it has enhanced long-horizon task performance, and improved performance on project-wide tasks such as refactoring and migrations as well as in Windows environments. Its cybersecurity capabilities have also been significantly strengthened.

To ensure safety, the model applies specialized model-level safety training and prompt injection defenses, along with product-level measures such as agent sandboxing and configurable network access.

According to Preparedness Framework evaluation results, it showed very strong capability in the cybersecurity domain but has not yet reached the 'High' level. However, given the pace of technological progress, it is expected to cross that threshold soon. In the biology domain, it has been classified as a 'High' capability model, and related safeguards are being applied; its AI self-improvement capability has not reached 'High'.