My guess is this is going to be powered using GPT-5/4.5 and they might've even used the model in the demo.
If I want to do something I have to rely on other sources to use it. That's just an overkill.
Chatgpt as a debugging partner has been a adam and eve sort of match to me. It's a saviour!
Also GPT-4 is just optimisations around speed. That's a big overkill of everyone's expectations.