Alphabet and Microsoft post strong cloud growth as AI partnerships turn complicated

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Alphabet and Microsoft just showed Wall Street how lucrative the AI arms race can be when you sell the weapons. Google Cloud more than doubled its revenue year-over-year, and Microsoft’s Azure grew 48% in its latest quarter.

The catch is that some of their best customers are also their fiercest competitors. Reuters Breakingviews describes the next frontier in AI as figuring out how to manage corporate frenemies, and these numbers show why that problem is getting expensive.

The numbers behind the cloud boom

Alphabet reported Google Cloud revenue of $30.71 billion for Q3 2026. That works out to a 103% increase from the same period a year earlier.

Analysts had expected growth of roughly 95%, which would have put revenue at about $29.57 billion. Google cleared that bar by more than a billion dollars.

Microsoft’s Azure business grew 48% in the company’s fiscal Q1 2027, reaching approximately $33.17 billion in revenue. On top of that, Microsoft recorded $10 billion in revenue tied to its arrangements with OpenAI during the quarter.

The growth is not free, though. Alphabet posted negative free cash flow of $9.07 billion in Q3 2026. Its AI-related capital expenditures for the quarter totaled $51.36 billion.

Partner, supplier, and rival all at once

The relationships underneath these figures are tangled. Reuters Breakingviews notes that Google is simultaneously a part-owner of Claude maker Anthropic, a supplier to it, and a competitor against it.

Anthropic’s contractual commitments show how deep these ties run. The AI lab has committed at least roughly $114.5 billion to Google through July 2033.

It has also made commitments of approximately $110 billion to Amazon and approximately $44.9 billion to Microsoft. That spreads its bets across all three major cloud providers.

Those platforms matter to Anthropic’s top line too. About 48% of the company’s revenue in the first half of 2026 came through the three cloud providers.

Microsoft’s situation with OpenAI follows a similar pattern. The $10 billion in quarterly OpenAI-related revenue makes the startup a major contributor to Microsoft’s results, even as both companies sell AI products to many of the same enterprise buyers.

The $700 billion question

Alphabet and Microsoft are not alone in their spending spree. Alphabet, Microsoft, Amazon, and Meta are collectively projected to spend more than $700 billion on AI infrastructure in 2026.

Alphabet’s quarter illustrates the tension neatly. A 103% jump in cloud revenue is the kind of growth most companies only see in pitch decks. Pairing it with $9.07 billion in negative free cash flow is the kind of detail that makes finance chiefs reach for antacids.

What this means for investors and the AI industry

Anthropic’s multi-cloud approach already hints at that leverage. Splitting commitments across Google, Amazon, and Microsoft means no single provider has an exclusive grip on its business.

There is also the competitive overlap to watch. Google sells its own AI models while hosting a rival’s. Microsoft distributes OpenAI technology while building its own capabilities.