Mostly False
A widely circulated claim that South Korea ranks third in the world in usage of Codex, OpenAI's coding AI tool, does not hold up under scrutiny of the available evidence, a review of primary sources has found.
The claim asserts that Korea is the world's third-largest market by usage of Codex. The ranking, if accurate, would place Korea among the leading countries in adoption of AI coding assistants — a notable figure given the country's size relative to the United States and other large markets.
A review of 12 primary sources found no official statistics or vendor disclosures confirming a global third-place ranking for Codex usage. OpenAI has not published country-level usage breakdowns for Codex that would substantiate the claim, and no Korean government body — including the Ministry of Science and ICT — has released figures supporting it.
The claim therefore rests on no verifiable ranking data. While Korean developers are active users of AI coding tools in general, the specific assertion of a world No. 3 position in Codex usage could not be substantiated by any source reviewed. No evidence directly contradicts the ranking either, but the burden of proof lies with the claim, which remains unsupported.
The claim is Mostly False.
Verdict: Mostly False