Re: announcing a new model at Dev Day 2024 - This TC article came out @ 3pm EST today and has this OpenAI quote:
"We’re not planning to announce our next model at DevDay,” an OpenAI spokesperson told TechCrunch. “We’ll be focused more on educating developers about what’s available and showcasing dev community stories.”
So unfortunately, sounds like we won’t get 4.5 or 5 til later this year. 