Personnel: Wojciech Zaremba at OpenAI (Co-founder, Head of Codex)

NoteThe source confirms Zaremba is a co-founder of OpenAI and that he led work on Codex. However, there is a discrepancy in the start date: the claim states 'startDate: 2015-12' (December 2015), but the Wikipedia article states 'In 2015, Zaremba became one of the co-founders of OpenAI' (month unspecified) and the infobox shows '2016–present'. The source does not specify December 2015 as the start date—it only says 2015 generally, and the infobox suggests 2016. The role 'Head of Codex' is partially confirmed: the source says he managed the development of Codex but does not explicitly use the title 'Head of Codex'. The co-founder status and Codex involvement are confirmed, but the precise start month and exact title are not fully verified by the source.