OpenAI’s Codex

Simon Willison:

OpenAI just released a new macOS app for their Codex coding agent. I’ve had a few days of preview access — it’s a solid app that provides a nice UI over the capabilities of the Codex CLI agent and adds some interesting new features, most notably first-class support for Skills, and Automations for running scheduled tasks.

Interesting, for sure. But super-duper interesting? I don’t know.

★ Tuesday, 3 February 2026