o3 can do much much more. There is nothing narrow about SOTA LLMs. They are already General. It doesn't matter what ARC Maintainers have said. There is no common definition of General that LLMs fail to meet. It's not a binary thing.
By the time a single machine covers every little test humanity can devise, what comes out of that is not 'AGI' as the words themselves mean but a General Super Intelligence.
If you want to play games about how to define AGI go ahead. People have been claiming for years that we've already reached AGI and with every improvement they have to bizarrely claim anew that now we've really achieved AGI. But after a few months people realize it still doesn't do what you would expect of an AGI and so you chase some new benchmark ("just one more eval").
The fact is that there really hasn't been the type of world-altering impact that people generally associate with AGI and no reason to expect one.