Codex + Codex Harness: the most reliable setup for long-running tasks

Codex models + Codex Harness have been the most consistent option for long-running tasks in my workflow. That consistency is why many top engineers I follow keep backing Codex.

I’ve tested Claude and Gemini for long-running workflows too, but I still see reliability gaps when tasks run for a long time. I’ve felt this way since the 4.0 generation, and it hasn’t really improved for my use cases.

If/when AI becomes the default “operator” for long-running tasks across industries, I believe Codex will stand out as the most dependable choice.