That was just the tech demo. It obviously wasn’t actually trained, just demoed for a few steps to show that the code works. If they had trained it back then, they’d, well, have announced it like OP! OP is what they’ve trained for-reals after further fiddling with that code.
It was not google, but Microsoft: in September 2020 they wrote: “The trillion-parameter model has 298 layers of Transformers with a hidden dimension of 17,408 and is trained with sequence length 2,048 and batch size 2,048.” https://www.microsoft.com/en-us/research/blog/deepspeed-extreme-scale-model-training-for-everyone/
That was just the tech demo. It obviously wasn’t actually trained, just demoed for a few steps to show that the code works. If they had trained it back then, they’d, well, have announced it like OP! OP is what they’ve trained for-reals after further fiddling with that code.