Nope, probably not. It's using JAX, which works on both GPUs and TPUs.
Re:GPT-J-6B: 6B JAX-Based Transformer
by londons_explore on Wednesday June 09, 2021 @04:10PM
(#27452508)
All the constants in the design will be tuned to fit perfectly in TPU hardware dimensions.
If you ran it elsewhere, you'd likely need to tweak the design or suffer quite a big performance penalty.