Yaccarino highlighted the work that the X team has done over the past two years under her leadership.
The news is the latest in an ongoing feud between Elon Musk and the Sam Altman-run firm OpenAI.
The new SpaceX valuation would represent yet another record-high as far as privately-held companies in the U.S. go.
Tesla sure is gathering a lot of Cybercab components around the Giga Texas complex.