According to Greg Brockman on X, OpenAI's GPT-5 Codex introduces a breakthrough capability for catching its own mistakes during code generation (source: x.com/_overment/status/1970630704489803857). This advancement enables the model to identify and correct errors in real-time, significantly improving code reliability and reducing debugging time for developers. The practical application of self-error detection in GPT-5 Codex positions it as a powerful tool for automating software quality assurance, opening new business opportunities in enterprise software, DevOps automation, and AI-powered code review solutions. The feature addresses a critical challenge in AI-assisted software development, making it a game-changer for productivity and code safety (source: Greg Brockman, X, 2025-09-24).