Those are applied-ML level advancements, OpenAI has pushed model level advancements. xAI has never really done much it seemed except download the latest papers and reproduce them.
Don't forget that OpenAI was also following Anthropic's lead at the model level with o1. They may have been first with single-shot CoT and native tokens, but advancements from the product side matter, and OpenAI has not been as original there some would like to believe.
pixelsort|1 year ago