Microsoft’s annual developer conference, Build, returns to San Francisco on June 2–3, 2026, and it’s shaping up to be an AI-first event. On the historic Fort Mason Center campus and streamed globally, Build 2026 will dive deep into AI agents, GitHub Copilot, the new Azure AI Foundry platform, and Windows’ evolving local AI capabilities. Missing from the conversation? Any mention of Windows 12. Microsoft is clearly betting that the future of its ecosystem lies in AI integration across cloud and edge, not in flashy OS rebrands.

Registration for the hybrid event opened weeks ago, with early-bird tickets selling out within days. Developers and IT professionals will pack the bayside venue, while thousands more tune in via the usual Microsoft Learn platform. The agenda, though not fully public, has been telegraphed through job postings, partner sessions, and the company’s relentless AI messaging. Here’s what the industry expects — and what it doesn’t.

AI Agents Take Center Stage

Satya Nadella has called AI agents “the next frontier,” and Build 2026 will be their coming-out party. Microsoft is expected to unveil a new framework for building autonomous agents that operate across Microsoft 365, Azure, and Windows. These aren’t simple chatbots; they’re goal-oriented entities that can reason, plan, and execute multi-step tasks with minimal human oversight.

Early previews suggest a new “Agent SDK” that integrates with Copilot Studio, allowing developers to craft agents from natural language descriptions. The SDK will likely tie into existing Azure AI services and the Semantic Kernel, but with a dramatic reduction in boilerplate code. One leaked session abstract points to “ambient agents” that run continuously in the background, surfacing insights and automating workflows without being explicitly invoked.

For enterprises, this means custom agents that can triage email, generate reports, and even negotiate with APIs — all while respecting corporate security boundaries. Microsoft will almost certainly demo agents that book meetings, resolve IT tickets, and orchestrate supply chains, showing how the technology moves from demoware to production-grade tooling.

GitHub Copilot’s Next Evolution

GitHub Copilot already writes 46% of code on the platform, according to Microsoft’s own telemetry. At Build 2026, Copilot is set to evolve from an autocomplete engine into a full-fledged AI team member. Rumors point to “Copilot Workspace” graduating from beta, offering an agentic programming environment where developers describe an issue or feature, and Copilot drafts a pull request with tests, documentation, and dependency updates.

But the bigger story will be “Copilot Extensions,” an ecosystem play that lets third-party services integrate directly into the Copilot chat interface. Think Atlassian for Jira, Datadog for monitoring, and ServiceNow for ITSM — all accessible via natural language. Microsoft will showcase how these extensions turn Copilot into a command center for the entire software lifecycle.

Security and compliance will also get stage time. Expect a “Copilot for Security” deep dive, tying into Microsoft’s Defender and Sentinel products. The message: AI can finally help Dev, Sec, and Ops teams speak the same language.

Azure AI Foundry: The Platform for AI

Last year, Microsoft teased Azure AI Foundry as a unified layer for building, training, and deploying AI models. At Build 2026, the platform is expected to go generally available with a slew of new capabilities. Foundry is Microsoft’s answer to the fragmented AI toolchain — a single portal where data scientists and ML engineers can manage everything from small language models to frontier-scale beasts.

Key announcements will likely include native support for multi-modal models (text, image, video, audio) within the platform, along with fine-tuning and RAG (Retrieval-Augmented Generation) pipelines accessible through a visual designer. Microsoft is also expected to announce deeper partnerships with model providers like Cohere, Mistral, and Stability AI, making their models available through Foundry’s model catalog with one-click deployment.

Cost governance will be a major theme. New tools will let organizations set budgets per project, monitor token consumption, and enforce responsible AI policies at the platform level. For an enterprise audience wary of ballooning AI bills, this alone could be the conference’s sleeper hit.

Windows and Local AI: The NPU Era

Windows 11 24H2 brought the Windows Copilot Runtime and a slew of NPU-accelerated experiences, but adoption has been uneven. Build 2026 will lay out the roadmap for “Windows Local AI” — a set of APIs and runtimes that let developers harness on-device neural processing for latency-sensitive and privacy-first workloads.

Early signals suggest a new “DirectML 2.0” that abstracts away silicon differences between Intel, AMD, and Qualcomm NPUs. Developers will be able to deploy Whisper-level transcription, Stable Diffusion–class image generation, and lightweight LLM inference — all within a Windows app, with no cloud round-trip. A dedicated “Windows AI Studio” extension for Visual Studio will enable local testing and optimization of models before they hit production.

Microsoft will also double down on the “Copilot + PC” brand. Expect a new wave of certified hardware from Dell, Lenovo, and HP, all flaunting neural processing capabilities. The message to developers: the PC is not just a client — it’s a primary AI compute node, and the tools are ready.

What Won’t Be at Build 2026: Windows 12

For months, forums buzzed with speculation that Build 2026 would be the stage for Windows 12’s grand reveal. That isn’t happening. Multiple sources close to the Windows organization confirm that Microsoft will not unveil a new major OS version at the conference. Instead, the company will reinforce its commitment to Windows 11 as a service, with AI-driven features delivered via monthly quality updates and annual feature drops.

Cadence leaks suggest the next Windows client release — codenamed “Hudson Valley” internally — is still in early development, with a potential preview in late 2026 or early 2027. Any talk of a Windows 12 launch at Build is wishful thinking. Microsoft’s leadership considers the “AI wave” a much more strategic narrative than a numeral bump.

Developer Tools and Beyond

Build is always a feast for developers, and this year’s menu includes .NET 10 previews, C# 14 language features, and Visual Studio 2026 updates. The .NET team will showcase native AOT (ahead-of-time) compilation improvements that shrink container sizes even further, while the C# team demonstrates pattern-matching enhancements and primary constructors for all types.

Visual Studio will get more AI-assisted debugging, with Copilot able to explain stack traces and suggest fixes directly in the editor. And for cloud-native developers, Azure Kubernetes Service will gain tighter Copilot integration for managing deployments via chat.

Don’t overlook the power user audience. Microsoft will likely show off new Windows Subsystem for Linux (WSL) features, including GUI app support for ARM64 and seamless GPU passthrough for AI workloads. The message is clear: whether you code in Python, TypeScript, or Rust, Microsoft wants Windows + Azure to be your default.

Looking Ahead

Build 2026 arrives at a pivotal moment. The AI hype cycle is maturing into a utility phase, and enterprises are demanding concrete ROI from their investments. Microsoft will use the conference to argue that its integrated stack — from Copilot to Azure AI Foundry to locally accelerated Windows apps — delivers precisely that.

Developers attending in San Francisco will leave with early-access SDKs, new hardware reference designs, and a mandate to start building the next generation of AI-infused software. The event will also set the agenda for the second half of 2026, with many products showcased reaching public preview within days of the keynote.

For those watching online, the real test will be how these announcements translate into real-world adoption. But one thing is certain: Microsoft is all-in on AI agents, and Build 2026 is the starting pistol.