API yes, ChatGPT no (at least not for all users); I've got my own web interface for the API so I can play with the model (for all of $0.045 of API fees), but most people can't be bothered with that and will only get 4o when it rolls out as far as their specific ChatGPT account.
I have a regular ChatGPT Pro account and I have GPT-4o.
The bigger issue is that 4o without the multi-modal, new speech capabilities or desktop app isn't that different to GPT-4. And those things aren't yet launched.
