OpenAI has a published Preparedness Framework, which it uses for measuring and protecting against severe harm from frontier AI capabilities. In the blog post announcing GPT-5.3-Codex, the company says ...

OpenAI's Codex MacOS app is a new hub where you can use AI agents to vibe code and create apps just by telling the AI what you want.

By launching a desktop app, OpenAI is catching up to Anthropic’s popular Claude Code, which already offered a macOS version.