All three letters of the initialism AGI mean different things to different people; to me, the Codex model was what made me think "this is it, it's here"… at least, it was when I saw the Two Minute Papers video on it — I didn't get a chance to play with the model itself when it was new, and "only" got API access about 6 months before ChatGPT came out.

https://openai.com/blog/openai-codex