Artificial IntelligenceGPT-5.3-Codex: OpenAI's Self-Improving Coding Agent That Helped Build Itself
GPT-5.3-Codex isn't just another coding model upgrade—it's the AI that helped design, debug, and evaluate itself. With state-of-the-art benchmark scores, 25% faster performance, and the ability to run 7+ hour autonomous coding sessions, Codex 5.3 transforms AI from "smart autocomplete" into a general-purpose engineering teammate that owns complex tasks end-to-end.
Sandun Gunathilaka•Feb 6
