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Large Language ModelsAI Stocks & MarketsAI Business & IndustrySemafor TechPublished: Sep 15, 2026, 10:00 JST

Microsoft, OpenAI back AI slowdown, chip stocks fall

Microsoft, OpenAI back AI slowdown, chip stocks fall

3 Key Points

  1. What happened

    Microsoft joined OpenAI, Anthropic, and SpaceXAI on Monday in endorsing a more prudent approach to frontier AI development. Global AI stocks fell as investors feared less compute spending could dampen the investment boom.

  2. Why it matters

    The endorsement shifts the stance from pure acceleration to caution. Deutsche Bank analysts noted the competitive race between companies and countries remains intense, making voluntary pullback hard to imagine while rivals push ahead.

  3. What to watch

    Whether Anthropic's profitable run and OpenAI's IPO stance signal divergent paths. Anthropic told investors it expects a second straight profitable quarter, while OpenAI has ruled out an IPO this year.

WHO IT HITSInvestors in AI and semiconductor stocks face renewed uncertainty, as the selloff reflects fears that reduced compute spending could slow the investment boom. AI company leaders and employees may also see pressure to balance caution with competitive demands.

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Context & Analysis

The selloff came after a rare public alignment among major AI players. Microsoft, OpenAI, Anthropic, and SpaceXAI all endorsed a more prudent approach to frontier model development on Monday. That collective stance rattled investors who have driven a global rally on expectations of relentless compute spending.

The timing is notable because the companies are not moving in lockstep on business strategy. OpenAI has ruled out an IPO this year, while Anthropic is telling investors it expects a second straight profitable quarter. Deutsche Bank analysts captured the tension, writing that the competitive race between companies and countries remains intense and that it is difficult to imagine firms voluntarily stepping back while rivals push ahead.

Microsoft's Mustafa Suleyman framed the shift as a matter of degree rather than direction, saying the company must keep developing but with more caution and care. The test now is whether that caution translates into slower spending or merely a more careful pace. For investors in AI and chips, the near-term question is whether Anthropic's profitable quarter and OpenAI's IPO stance signal diverging paths that could reshape the boom's trajectory.

FAQ
Which companies endorsed a slower approach to AI development?
Microsoft joined OpenAI, Anthropic, and SpaceXAI in endorsing a more prudent approach to frontier model development.
How did the stock market react?
Global AI stocks fell Monday, as investors worried that less compute spending could dampen the investment boom.
What did Microsoft's Mustafa Suleyman say?
He said, 'We have to keep developing. We just have to do it with a little bit more caution and care.'

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