Codex CLI is written in Rust and significantly more efficient than Claude Code. I had no trouble running it on a 2012 laptop. VSCode/standard browsers were the main problem software, as one would expect.
And you can remote control it from the Codex Desktop app (now the new ChatGPT app) or from the ChatGPT mobile app.
And you can remote control it from the Codex Desktop app (now the new ChatGPT app) or from the ChatGPT mobile app.