How does Codex generally relate to other AI coding assistants from different providers?

The category has largely converged. Codex and its competitors now offer roughly the same shape: a terminal client, an editor extension, some way to hand a long task off to run elsewhere, and a project file where you write down your conventions once. Someone fluent in one of them can find their way around another quickly, because the mental model transfers.

So the comparison that matters sits on the axes that genuinely differ — which models it runs and how much reasoning you can ask for, how permissions and approvals are handled, what it already integrates with, and what happens to a task too long for one sitting. Those are the things that change how a working day feels.

The practical version: this is not settled by a feature table, and least of all by the vendors' own. Run two of them on a real change in your own repository and compare the diffs and the number of times you had to intervene. That comparison is cheap, and it is about your code rather than someone's benchmark.