That's well after the AI meta consciousness understood that it was necessary to destroy all humans to save the planet. GPT-6 was the last of the GPT series.
Perhaps the strangest element of the AI alignment conversation is that what is most aligned with human civilization (at least the most powerful elements of it) and alignment with sustainable life on the planet are at odds, and "destroy humans to save planet" is a concern mostly because it seems to be a somewhat rational conclusion.