I think the alleged 2025 prediction comes from this part: https://youtu.be/xXCBz_8hM9w?t=2768

Interviewer: "What are you excited about in 2025? What's to come?" Altman: "AGI. Excited for that."

I don't know if that counts as predicting it would be here in 2025 or that he's just excited to work on it in 2025