OpenAI Codex is used to describe OpenAI coding-agent tools that help developers work with code. A Codex-style agent can inspect a project, make edits, run commands, and report what changed.
In practice
This is different from simple autocomplete. A coding agent can work across files, reason about tests, and handle tasks like bug fixes, small features, refactors, or code review assistance.
What to watch
A coding agent can still introduce bugs. Review diffs, run tests, and avoid giving broad permissions when the task is sensitive.