Microsoft AI CEO Mustafa Suleyman says $100 billion training runs are coming

Mustafa Suleyman thinks the price of building frontier AI is about to get very large. In a late September 2026 interview, the Microsoft AI CEO said a single frontier training run could soon cost “many, many tens of billions of dollars, if not a hundred billion dollars.” His timeline is short: the next couple of years. His guest list is shorter still. Suleyman says only five or six labs worldwide can afford to play. The price of admission keeps climbing The comments came on September 28, 2026. They also connected costs to speed: more compute, concentrated among fewer labs, should mean faster progress in AI development, in Suleyman’s telling. He backed that view with two striking figures. Training compute for frontier models has grown a trillion-fold over the past 15 years. Over the past two years alone, inference costs have fallen 300-fold. “Many, many tens of billions of dollars, if not a hundred billion dollars.” Mustafa Suleyman, on the potential cost of frontier training runs A forecast he has been building toward This is not a new position for Suleyman so much as an escalation of one. In December 2025, he predicted that staying competitive in AI over five to ten years would req...