GPT-5.3-Released in the latest Codex App

OpenAI Introduces Codex App for Multi-Agent AI Software Development

Introducing the Codex app for macOS—a command center for AI coding and software development with multiple agents, parallel workflows, and long-running tasks.

Codex Manager v1.3.0 - New Chats experience, safer workflows, workspace‑scoped defaults

Customizing and Securing Your AI Experience: ChatGPT and Beyond