Gary Marcus says AI infrastructure would need $2.5 trillion in annual revenue to pencil out

GaryMarcus · x · 2026-07-29

Gary Marcus says AI capex would require $2.5T in annual revenue to justify itself

Quoted post argues that big tech’s AI spending must at least cover depreciation and earn a small profit on each unit of capex.

Under that assumption, the implied requirement is about $2.5 trillion of AI revenue every year, forever.
The quote’s punchline is that current AI revenue is nowhere near that scale.

It’s a critique of the economics behind massive AI infrastructure spending, not a claim about a specific company’s fundraising or product launch.

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