Microsoft's Build 2026: A $190 Billion Independence Bid Tests Investor Patience

The tension was palpable in Redmond this week. Microsoft’s third-quarter earnings showed an AI revenue surge of 123 percent to an annualized run rate of $37 billion, yet the stock shed 6.30 percent to close at €361.70. For CEO Satya Nadella, the disconnect is the price of ambition. At the Build 2026 developer conference, he unveiled seven internally developed AI models — a decisive break from the company’s deep reliance on partners like OpenAI and Anthropic.

The flagship model, MAI-Thinking-1, is Microsoft’s first reasoning model trained entirely in-house without any distillation from OpenAI or other third-party sources. With 35 billion active parameters and a 256,000-token context window, it already beats competitors like Claude Sonnet 4.6 in independent benchmarks. Mustafa Suleyman, Microsoft’s AI chief, put it bluntly: “The goal is to prove that we can be one of the top four labs in the world.” He conceded the company is not yet in that league alongside Google DeepMind, OpenAI, and Anthropic.

Suleyman also addressed the cost burden of Microsoft’s existing partnerships in a Bloomberg interview. “Anthropic is extremely expensive,” he said. “Many are urgently looking for alternatives. We are paying a lot of money to Anthropic — our goal is to reduce and ultimately eliminate these costs.” The shift has been accelerated by the renegotiation of the OpenAI partnership in April, which gave OpenAI the freedom to offer its products on other cloud platforms while freeing Microsoft to pursue its own model strategy.

To support that strategy, Microsoft is developing custom chips optimised for its own models, and GitHub Copilot is being retooled as a direct rival to Anthropic’s Claude Code. The financial logic is clear: the company’s capital expenditure is projected at $190 billion for the current fiscal year, driving the gross margin down to 67.6 percent — the lowest since 2022. Finance chief Amy Hood has flagged that depreciation charges on new data centres are squeezing profitability.

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Yet the top line remains robust. For the third fiscal quarter of 2026, Microsoft reported revenue of $82.9 billion, up 18 percent year-on-year. Azure grew 40 percent, and the commercial seat count for Microsoft 365 Copilot jumped from 15 million in January to more than 20 million. The company’s commercial backlog now stands at an imposing $627 billion.

Despite those numbers, investors are jittery. The Federal Trade Commission has widened its probe into Microsoft’s business practices, focusing on cloud services, AI, and software bundling. A recent executive order by Donald Trump instituting a voluntary AI software review programme has added further regulatory uncertainty.

Morgan Stanley analyst Keith Weiss argues the market is underestimating the value of Microsoft’s infrastructure build-out. He notes the company plans to expand its datacentre capacity from roughly 5 gigawatts in fiscal 2024 to about 20 gigawatts by 2028, with “bullish upside potential” for future revenues. The stock currently trades about 24 percent below its 52-week high of €478.10 and remains well below its 200-day moving average of €391.25. The average analyst price target, however, sits at $561.

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Beyond the language model push, Build also showcased a quantum computing milestone — the Majorana 2 chip, which promises a thousandfold improvement in qubit reliability with an average life of 20 seconds. Microsoft aims to have a commercially viable quantum computer by 2029. Another announcement, Project Solara, is an Android-based platform for agent-driven devices that runs AI agents in the background rather than traditional apps. Retailers Best Buy, CVS, and Target are already evaluating it.

The coming quarters will tell whether Microsoft’s bet on self-reliance pays off. The next earnings report in October will be the first to show whether the new MAI models can materially reduce the company’s dependence on expensive third-party AI providers — and whether that is enough to win back Wall Street’s confidence.

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