Thanks to his company’s explosive stock growth and the blue wave of U.S. election results, Elon Musk is right there with Jeff Bezos.

Is he or isn’t he the richest person on the planet? Depends on whom you ask.

Several reports had the Tesla CEO moving ahead of Bezos, the Amazon.com founder, after Thursday’s jump in the price of Tesla stock. The value of his wealth on paper moved to more than $188 billion, according to the Bloomberg Billionaires Index.

Tesla shares rose more than 7% on Thursday, helping push Musk’s net worth to $1.5 billion above Bezos’ fortune, according to Bloomberg. Shares are up almost 800% from about $92 a year ago. After closing at more than $811 in Thursday’s trading, Tesla shares were up another 6% as of 2 p.m. ET on Friday.

Musk seemed mildly amused at his new ranking, tweeting in response, “How strange.” He later added, “Well, back to work …”

Not everyone agrees he’s now No. 1.

Musk remains in second place, according to Forbes’ estimates, which pegged Musk at $175.2 billion and Bezos with a net worth of $186.8 billion. Regardless, Musk does have plans to continue putting his money to work. An older tweet offered further insight.

“About half my money is intended to help problems on Earth, and half to help establish a self-sustaining city on Mars to ensure continuation of life (of all species) in case Earth gets hit by a meteor like the dinosaurs or WW3 happens and we destroy ourselves,” he wrote.

In a BBC story, Daniel Ives, an analyst with Wedbush Securities wrote: “A Blue Senate is very bullish and a potential ‘game-changer’ for Tesla and the overall electric vehicle sector, with a more green-driven agenda now certainly in the cards for the next few years.”

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