OpenAI Codex

OpenAI Codex is OpenAI's code-oriented model line, translating natural-language descriptions into working code and explaining existing code back in plain language.

Its practical use is in the loop rather than at the end: scaffolding a function, translating between languages, writing tests against an existing implementation, or explaining unfamiliar code you have inherited.

Generated code needs review like any contribution — it can produce plausible code with subtle logic or security flaws, and it does not know your codebase's conventions unless shown them.