OpenAI's Codex app finally lands on Linux — with one catch

OpenAI has shipped the Codex desktop app for Linux, closing the gap with the macOS and Windows builds that landed earlier. Officially supported: Ubuntu 24.04 and 26.04 LTS, Debian 13, and Fedora 43 and 44 — a conservative list that covers the distros most developer workstations actually run.

The asterisk: Computer Use, the agentic mode that lets Codex drive a GUI to click through apps and browsers on your behalf, is not available on Linux yet. Everything else — the local agent loop, repo-aware editing, sandboxed execution — comes along. For most engineers on Linux, that's the feature they were already using through the CLI; the desktop app mainly adds a persistent, multi-session surface around it.

The timing matters more than the feature list. Linux is where the majority of serious backend and infra work happens, and coding agents have been quietly conceding that ground while shipping Mac-first. Anthropic's Claude Code and Cursor both reach Linux devs; a Codex app that didn't was leaving its most technical users on the CLI.

Why it matters: the agentic coding fight is now being fought on the desktop, and OpenAI just stopped forfeiting the platform where its most technical users actually work.