Big Tech’s latest earnings season has turned into a referendum on artificial intelligence spending. Alphabet, Meta, Microsoft and Amazon all reported strong headline numbers, but investors reacted very differently depending on whether they could see a clear payoff from the hundreds of billions being poured into AI infrastructure.

Alphabet emerged as the clear winner, with its shares jumping more than 10% to $384.80, while Meta fell 8.5% to $611.91 after investors questioned the scale and visibility of returns from its AI spending. Microsoft slipped nearly 4%, while Amazon ended marginally higher, reflecting a more mixed investor response.

The message from Wall Street was clear: AI capex is acceptable only when it is backed by visible revenue acceleration, backlog and margin expansion.

Google becomes the AI-capex winner

Alphabet delivered the cleanest answer to the AI-return question. Revenue rose 22% to $109.9 billion, while Google Cloud revenue surged 63%, crossing $20 billion for the first time. More importantly, Cloud backlog nearly doubled quarter-on-quarter to over $460 billion, giving investors a clear line of sight into future revenue.

Sundar Pichai framed the quarter as proof that Alphabet’s AI investments are now showing up across the business.

“It’s clear that our AI investments and full-stack approach are driving performance across our business,” Pichai said on the earnings call.

He added that Google Cloud had accelerated again due to strong demand for AI products and infrastructure, while Search continued to benefit from AI Mode and AI Overviews.

That helped investors look past the company’s higher capex. Alphabet raised its 2026 capital expenditure guidance to $180–190 billion, but the increase was relatively modest compared with the scale of Cloud growth. Google Cloud is currently the fastest-growing major cloud provider, with its 63% year-over-year revenue surge in Q1 2026 outpacing Azure (40%) and AWS (28%), driven largely by an 800% increase in revenue from its GenAI models

Alphabet’s stock climbed around 34% in April, its best monthly performance since 2004, according to Dow Jones Market Data cited by MarketWatch.

Meta beats, but investors reject the capex reset

Meta’s quarter was strong on paper. Revenue rose 33% to $56.31 billion, operating income increased 30% and operating margin held at 41%. The company also reported a 19% rise in ad impressions and a 12% increase in average price per ad.

But the stock still fell sharply because Meta raised its 2026 capex guidance to $125–145 billion from $120–135 billion, citing higher component pricing and additional data centre costs.

Zuckerberg defended the investment as foundational to Meta’s next phase.

“Our biggest milestone so far this year has been the release of our Muse family of models… This was the first release from Meta Superintelligence Labs, and it shows that our work is on track to build a leading lab,” Zuckerberg said.

He also pushed back against the idea that AI is simply about replacing workers.

“People will be more important in the future, not less,” Zuckerberg said, adding that Meta wants to build AI products that empower individuals.

Still, investors remained unconvinced. The issue is not that Meta lacks growth. It is that its AI spending does not have the same visible monetisation channel as Google Cloud, AWS or Azure. Zuckerberg said Meta is investing “top to bottom” to build frontier models, agents and infrastructure, but for Wall Street, that remains a longer-dated bet.

Microsoft shows demand, but capex worries weigh

Microsoft also delivered strong AI and cloud numbers. Microsoft Cloud revenue rose 29% to $54 billion, while its AI business surpassed $37 billion in annual recurring revenue, up 123%. Azure and other cloud services revenue grew 40%, ahead of expectations, helped by earlier delivery of capacity during the quarter.

Satya Nadella said the company is at the beginning of a major platform shift.

“We are at the beginning of one of the most consequential platform shifts that will change the entire tech stack as agents proliferate and become the dominant workload,” Nadella said.

He added that Microsoft is building “the world’s leading cloud and AI infrastructure for the agentic computing era.”

But Microsoft shares still fell as investors focused on the size of the spending requirement. Microsoft plans capital outlay of around $190 billion in 2026, including higher component costs, even as demand continues to exceed available capacity.

Amazon lands in the middle

Amazon’s results were led by AWS, which grew 28% to $37.6 billion, its fastest growth in 15 quarters. CEO Andy Jassy said the scale of AWS today makes the acceleration more meaningful.

“The last time we saw growth at this clip, AWS was roughly half the size,” Jassy said.

He also defended Amazon’s AI capex, arguing that returns become attractive once infrastructure is in service.

“However, in times of very high growth, like now, where the capex growth meaningfully outpaces the revenue growth, the early years, free cash flow is challenged,” Jassy said.

That captures Amazon’s problem. AWS growth is clearly improving, but free cash flow pressure remains the overhang. Amazon CFO Brian Olsavsky confirmed the company spent $43.2 billion on capex in Q1 and had earlier indicated around $200 billion in 2026 spending, much of it tied to AI infrastructure.

The verdict

The market is not rejecting AI spending. It is rejecting unclear AI spending. Google was rewarded because its AI investments are already visible in Cloud revenue, backlog and margins. Meta was punished because its capex reset looked larger than the near-term monetisation proof. Microsoft and Amazon remain credible AI winners, but investors are now asking harder questions on free cash flow, margins and return on capital.