In recent days, Musk has stopped mentioning a third party and is focused on building his business. At the same time, the U.S. government is collaborating with Grok.
Perhaps Musk and Trump have reached a compromise. The Trump administration understands the significant influence Musk would have on the Republican Party if he created a third party, so they have made concessions privately. Of course, if one day Trump turns against them, there will be forces to counterbalance.
Musk has been making significant moves lately; he is determined to build an AI kingdom and is entering a phase of integration of top technologies across various fields.
Musk's various companies already hold a monopolistic position in their respective fields, and further integration will create a new dimension of technological monopoly.