Gary Marcus: bear case for AI strengthens as S&P 493 shows zero productivity gains

GaryMarcus · x · 2026-10-25

Gary Marcus argues the negative case against AI keeps strengthening — even Altman admits the problems are serious with no obvious solution. He quotes Apollo's Torsten Slok: despite massive investment, AI has delivered zero financial payoff outside tech. Revenue per worker and profit margins are flat for the S&P 493, measured productivity growth shows no AI boost, and mainstream corporate America now treats token spending as a cost center and won't pay for the latest models. As long as agentic AI stays confined to a small slice of the economy, macroeconomic effects will be limited.

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