Gary Marcus: Expected-Value Math Shows Anthropic Can't Justify a $2T Valuation

GaryMarcus · x · 2026-09-30

Gary Marcus argues Anthropic-style AI valuations ignore basic expected-utility math: promising to own a $30 trillion market at 0.01% odds yields just $30 billion in expected value — nowhere near a $2 trillion valuation. He says the math only works by ignoring failure modes: massive liability, competition, price wars, rising rates, open source, and the eventual shift to local models. Applying the same logic to existential risk, he notes a 10% chance of annihilating humanity means an expected loss of 800 million lives.

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