Edit: here is the message I get:
Your access to custom GPTs isn’t ready yet. We’re rolling this feature out over the coming days. Check back soon.
> Example GPTs are available today for ChatGPT Plus
or
> Starting today, no more hopping between models; everything you need is in one place.
Neither of which are true. I'm a paying user and I have access to neither. They do this _all the time_. They announce something "available immediately" and it trickles out a week or more later. If they want to do gradual rollouts (which is smart) then they should say as much.
The announced (and a few days ago leaked) Omni prompt also doesn't show up in the model selector. And that despite the expanded context looking very promising for the REPL-feedback-augmented code generation abilities.