Introducing GPT-5.3-Codex: Advancing Agentic Coding
GPT‑5.3‑Codex: The Coding Agent That’s Starting to Feel Like a Real Coworker When I first tried the original Codex a few years ago, it felt a bit like handing a junior intern a half‑finished script and hoping they’d “figure it out.” It could churn out snippets, but it needed a lot of hand‑holding, and the results were often… well, let’s just say “creative.” Fast‑forward to today, and OpenAI has dropped GPT‑5.3‑Codex – a model that not only writes code but steers a whole computer session, reacts to your prompts in real time, and even helped debug itself during training. In plain English: it’s the first coding agent that can act like a teammate who knows the whole project, not just the line you’re stuck on. ...