xAI failed to produce a frontier model. They got involved into nudifying and other questionable activities as well. People started leaving in droves: https://www.nbcnews.com/tech/elon-musk/xai-musk-addresses-wa...
xAI is a failed company, as is X. Their merger into SpaceX is basically a scam. Elon Musk justified this by saying he is going to send xAI servers into space using SpaceX. This is an unproven idea, not ready for investing.