Microsoft 365 Copilot Wave 3 Launches with GPT-5.4 Thinking — The Biggest AI Update Yet

Microsoft has announced Copilot Wave 3 for Microsoft 365, bringing GPT-5.4 Thinking and GPT-5.3 Instant models, the new Agent 365 platform, and a promise of continuous frontier AI capabilities for enterprise users.

Microsoft has unveiled Microsoft 365 Copilot Wave 3 — the most significant update to its AI-powered productivity suite since Copilot launched. Wave 3 arrives alongside two powerful new AI models, a new enterprise agent platform, and a commitment to what Microsoft is calling “Frontier Transformation” — moving AI from experimentation to genuine enterprise-wide business value.

Microsoft 365 Copilot Wave 3 — AI-powered productivity
Microsoft 365 Copilot Wave 3 — GPT-5.4 Thinking for enterprise

New AI Models: GPT-5.4 Thinking & GPT-5.3 Instant

Wave 3 brings two new models to Microsoft 365 Copilot and Copilot Studio:

  • GPT-5.4 Thinking — Microsoft’s most capable model yet, designed for complex multi-step reasoning tasks. Can work through deeply complex problems while maintaining enterprise-grade privacy and security.
  • GPT-5.3 Instant — Optimized for speed and everyday tasks, delivering faster and more accurate responses for common workplace queries with less back-and-forth.

Agent 365 — General Availability May 1

Microsoft is also announcing Agent 365, a new control plane for AI agents launching in general availability on May 1, 2026, priced at $15 per user per month. Agent 365 gives IT and security teams a single place to observe, govern, manage, and secure AI agents across the organization. In preview, tens of millions of agents have already appeared in the Agent 365 Registry across Microsoft’s customer base.

Microsoft 365 E7: The Frontier Suite

Microsoft is introducing Microsoft 365 E7, which bundles Microsoft 365 E5, Microsoft 365 Copilot, and Agent 365 into a single package at $99 per user per month — positioned as below the cost of purchasing these capabilities separately. E7 launches May 1 alongside Agent 365.

Copilot in Teams Gets Redesigned App Bar

Also beginning in mid-March, Microsoft Teams is rolling out a simplified app bar designed to reduce visual clutter and make AI features more discoverable. The updated layout streamlines navigation and makes Copilot more central to the Teams experience.

The Numbers

Microsoft reports Copilot paid seats grew more than 160% year over year, with daily active usage up ten times as customers increasingly make Copilot a core part of everyday work. Wave 3 represents Microsoft’s bet that the enterprise AI market is shifting from experimentation to permanent infrastructure.