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Reading: Positron’s CTO on whether the AI build-out gets finished
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Positron’s CTO on whether the AI build-out gets finished

Thomas Sohmers tells 20VC that memory, power and debt, not chip supply, will decide how much of the AI data center boom actually gets built.

Techflier Staff
Last updated: September 20, 2026 2:32 am
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Thomas Sohmers, co-founder, chief technology officer and chairman of inference chip maker Positron AI, joins 20VC to explain why running models is a fundamentally different infrastructure problem from training them.

Positron recently closed an $875M Series C at a $5B valuation, backed by Atreides Management, NEA, Valor Equity Partners and Netscape co-founder Jim Clark. Sohmers walks through the memory wall, the economics of AI tokens, and his argument that sovereign debt poses a bigger threat to the build-out than data center borrowing.

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TAGGED:20VCAI inferenceenergyPositron AIsemiconductorsventure capital
SOURCES:20VC with Harry Stebbings
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