That would give America's adversaries more time to catch up, the Pershing Square CEO tweeted.
Earlier, Elon Musk and others called for a six-month halt on AI development.
Apparently in response to an open letter that calls for a six-month break in AI development, the Pershing Square CEO tweeted that this would be detrimental to national security.
"Shutting down AI development for six months gives the bad guys six more months to catch up," he wrote.
"In a sane world, we would slow development until we could be assured that AI is aligned with humankind," he tweeted.