OpenAI's most powerful code model, GPT-5.2, is now available on Codex.

OpenAI has released GPT-5.2-Codex, its most advanced agent coding model to date, achieving significant breakthroughs in complex software engineering tasks. The new version significantly improves instruction compliance, long context understanding, and cybersecurity performance, achieving state-of-the-art results in benchmarks such as SWE-Bench Pro and Terminal-Bench 2.0. Its unique context compression technology efficiently handles large codebases, supporting complex refactoring and migration tasks.