Azure numbers from Microsoft’s FY26 Q4:

• Annual revenue surpassed $100B, up 41%

• Q4 growth accelerated from 40% to 43%

• Microsoft still expects further acceleration through the first half

The commitments number worth breaking down

Total commercial RPO reached $678B, up 84% YoY and $51B sequentially. Microsoft said all of that QoQ growth came from customers outside frontier model companies.

Microsoft does not break out Azure commits, so we estimated them

OpenAI was last disclosed at ~45% of $625B RPO in Q2, or ~$281B. Holding that constant as a conservative upper bound leaves ~$397B of diversified backlog. Azure is ~47% of Microsoft Cloud revenue ($100B of $214.4B).

Estimated enterprise Azure commits: ~$187B, up ~$24B. This is the MACC-eligible slice. It grew ~15% in a single quarter.

Microsoft AI usage is picking up:

• Foundry reached 100,000 customers, with revenue 2X+

• Customers operating at a one-trillion-token annualized rate increased 4X

• Copilot’s weekly engagement is now comparable to Outlook and Teams, while 50,000+ seat customers increased 7X

Meanwhile, Microsoft is shifting its own flagship products from per-seat to seat-plus-consumption.​

Designed so any model is substitutable

• 11,000 models in the Azure catalog, including OpenAI, Anthropic, Mistral, xAI and Microsoft's own MAI family

• 5x increase since January in customers building with models from multiple providers

​Satya Nadella said companies should keep "your harness separate from the model," so that "any given model at any given time is swappable," leaving enterprise memory and context outside any one model family.

That is Microsoft’s Azure strategy: make models swappable while Azure monetizes the infrastructure and surrounds them with data, context, and governance.

For alliance leaders, the Q4 signal is broader than another strong Azure quarter. Microsoft is building a platform designed to benefit regardless of which model wins, while its commitment base continues to diversify beyond frontier labs.

CapEx on track

Microsoft moved its calendar 2026 capex expectation to $175B from $190B.

Amy Hood attributed the change to future data center leases shifting from finance to operating leases, and said underlying investment expectations are unchanged. The accounting moved, not the spending.

"We added 31 new datacenters across five continents this quarter, bringing the total to 88 this year as we expand our footprint in response to accelerating demand."

Azure is accelerating, and this quarter’s new commitments came from outside frontier labs. How much of your FY27 Microsoft plan is built to capture that broader consumption?