Microsoft bets on enterprise AI as Nadella pushes Copilot as the ‘OS for work’

Microsoft wants to be the place where corporate AI actually gets used, not just piloted. CEO Satya Nadella is pushing that goal through new models, new pricing and a wider rollout of the company’s AI tools to businesses.

The centerpiece is a major Copilot update announced on September 25, 2026, which Microsoft is branding the “OS for work.”

What Microsoft announced

The revamped Copilot pulls several capabilities under one roof, including chat and code functions.

Alongside the product update comes a new pricing structure. Microsoft is combining per-user subscriptions with usage-based credits.

The broader shift is toward token-based pricing. Tokens are the small chunks of text that AI models process, so billing by token ties cost directly to usage.

Microsoft also plans to fold its proprietary MAI models into its AI strategy. The stated aim is better cost efficiency and stronger performance on specific tasks.

The numbers behind the push

Microsoft has some traction to point to. As of Q3 fiscal 2026, Microsoft 365 Copilot had passed 30 million paid subscribers.

Over the same period, Microsoft’s AI services reached a $37 billion annual revenue run rate.

Azure revenue grew 43% year over year in fiscal Q4 2026, and full-year revenue topped $100 billion.

Agent 365 registered 40 million agents within two months of its 2026 launch.

Why Nadella calls 2026 a turning point

Nadella has framed 2026 as the year AI moves from experimentation to enterprise impact.

His pitch centers on AI systems that come with governance structures and effective memory management. Governance means rules about who can do what with the AI and its data. Memory management means the AI can retain useful context without losing track or leaking information.

Nadella’s broader vision is a multi-faceted AI ecosystem that raises productivity while staying safe and reliable. The goal is lowering operational costs for businesses that adopt it.

What this means for customers and investors

The pricing change is the part most likely to ripple outward. Usage-based billing could make AI cheaper to start with, since light users won’t subsidize heavy ones.

For Microsoft, flat seat pricing caps revenue per user, while usage-based credits let revenue climb as customers lean on AI more heavily.

Microsoft 365 has a massive installed base, and 30 million Copilot subscribers is a meaningful start, but it is still a slice of that audience.

The MAI models add another layer. If Microsoft can deliver comparable performance at lower cost using its own models, it gains pricing flexibility against rivals and reduces its reliance on outside model providers.

The key things to watch are Copilot subscriber growth in coming quarters, whether Azure can sustain growth at this pace, and how enterprise customers respond once usage-based bills start arriving. Agent adoption beyond initial registrations will also show whether the “OS for work” branding reflects how people actually work.