Microsoft’s Claim to Have Bested OpenAI’s Model at One Fourth The Cost Intrigues Me Enough to Buy
Microsoft claims its in-house AI models now match OpenAI's output at a fraction of the cost, and that single number reshapes how one investor is sizing up the entire cloud AI trade against Alphabet and Amazon.
I follow Microsoft (NASDAQ:MSFT | MSFT Price Prediction) closely, and the company’s latest earnings call gave me one more reason to keep researching it. Microsoft says its in-house MAI models now match OpenAI’s output on common work for a fraction of the cost. I’m building a retirement portfolio that has to compound for decades, so I care about that cost curve more than any other number.
Cheaper Intelligence Keeps Pulling Me Back
Enterprises run their AI on Microsoft’s platform, and Microsoft keeps cutting the cost of every answer. On the July call, management said MAI Cyber One Flash beat a much larger model at half the cost, and MAI Voice 2 Flash delivered an 89% reduction of GPU costs in Dynamics 365. Satya Nadella, the chief executive at the time of the call, put it simply: “We are advancing the frontier on the cost-to-outcome curve, ensuring every customer can turn tokens into business results.” CFO Amy Hood added that “Demand continues to exceed available supply.” With demand exceeding supply, every efficiency gain shows up as margin.
Three Receipts Behind Microsoft’s Momentum
First, growth at scale. Fiscal 2026 revenue reached $331.84 billion, up 17.79%. Azure posted 43% growth in the fourth quarter and passed $100 billion in revenue for the full year. Commercial remaining performance obligations hit $678 billion, up 84%, so I can already see years of contracted demand.
Second, profitability. Microsoft runs a 46.78% operating margin, a 40.31% net margin and a 22.01% return on the capital it has invested. Fourth-quarter EPS of $4.74 beat the $4.24 estimate, making it the fifth consecutive beat.
Third, its financial position and income stream. Microsoft’s debt-to-equity sits at 0.29 and interest coverage at 50.88. The dividend yields 0.67%. Microsoft announced another quarterly dividend increase in September 2026, and in fiscal Q2 alone it returned $12.7 billion to shareholders.
Why Microsoft Stands Out Against Alphabet and Amazon
Alphabet (NASDAQ:GOOGL) trades at 15 times earnings, against 30 for Microsoft. A $99.03 billion gain on equity securities ballooned Alphabet’s second-quarter net income, which makes that multiple look cheaper than it is. In the same quarter its free cash flow came in at negative $5.855 billion, it suspended buybacks, and long-term debt rose from $46.5 billion to $98.2 billion. Its dividend yield of 0.5% is also lower than Microsoft’s.
Shares of Amazon (NASDAQ:AMZN) trade at 36 times earnings and pay no dividend. It sells for 367.88 times free cash flow, against 59.14 for Microsoft, and its trailing free cash flow stands at negative $7.6 billion. Its operating margin is 11.16%.
Risk I Refuse to Ignore
Capital spending is the biggest risk to Microsoft’s outlook. Fiscal 2026 capex rose 79.62% to $115.95 billion. Fourth-quarter free cash flow fell 23.19% to $19.64 billion, and management expects capex of roughly $175 billion. OpenAI concentration also matters to me: excluding OpenAI, commercial RPO grew only 25%.
Several metrics offset that risk. Operating cash flow rose 34.35% to $182.94 billion, and nearly 90% of Microsoft Cloud revenue came from customers outside frontier model companies. Hood also said capex has switched toward “short-lived assets,” so “if the demand environment changes, you just slow down” the biggest cost driver.
Growth Drivers Investors Can’t Afford to Miss
Microsoft 365 Copilot has passed 30 million paid seats, and net seat additions more than doubled sequentially. Foundry has 100,000 customers, and Microsoft expects to roughly double its capacity in two years. All of that capacity has to be powered, cooled, and connected by someone, and we featured seven of the companies doing exactly that in a free AI infrastructure report. The stock gained 907.07% over the past ten years. Each cheaper model broadens the gap between what Microsoft charges and what it spends, and that gap is the metric to watch.
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Alex Sirois is a financial writer with experience spanning both retail and institutional investing. He has written for InvestorPlace and held roles at BNY Mellon and Bernstein, giving him a perspective that bridges Main Street portfolios and Wall Street analysis.
Alex holds an MBA from George Washington University and has built his career across multiple industries, including e-commerce, education, and translation — a breadth of experience that informs how he breaks down complex financial topics for everyday investors. His writing is conversational, actionable, and grounded in long-term, buy-and-hold investing principles.
At 247 Wall St., Alex focuses on delivering analysis that is both accessible and useful, with a clear emphasis on helping readers make more informed decisions with their money.
