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Microsoft Build 2025: AI Agents, Open Platforms, and the Next Wave of Developer Tools

Microsoft used Build 2025 to lay out an ambitious roadmap for an Open Agentic Web—a world where AI agents move from experiments to mainstream products. CEO Satya Nadella framed the shift as a move away from vertically integrated apps and toward open, extensible agent platforms that run at global scale.

Satya Nadella at Build

Building the Open Agentic Web

The vision: every layer of Microsoft’s stack (infrastructure, data, AI models, apps, and agents) should empower developers to craft customised agent experiences. Think of it as an internet that responds, reasons, and completes tasks on your behalf.

Open agentic web concept

Developer Tools: Visual Studio, VS Code, GitHub

  • Visual Studio adds .NET 10 previews, real-time design surfaces, improved Git tooling, plus upgraded debugging for cross-platform C++.
  • VS Code celebrates its 100th open-source release with better multi-window support and commits to open-sourcing the Copilot Chat extension so the community can inspect and extend it.
  • GitHub positions Copilot as a full coding agent—capable of bug fixes, feature scaffolding, test generation, documentation, and even framework migrations (Java 8 → 21, .NET 6 → 9). An Azure SRE agent now handles incident triage, RCA, and GitHub issue creation automatically.

GitHub coding agent

Microsoft 365 Copilot and Teams

Microsoft 365 Copilot rolls chat, search, notebooks, creation, and agent automation into a unified canvas—arguably the most significant update since Teams launched. Users get context-aware chat over web + work data, semantic search across Confluence/Google Drive/Jira, and notebook-style multi-modal reasoning. Custom agents can be built inside an agent studio with guardrails, scripting, delegation, and monitoring tools.

Microsoft 365 Copilot integrated experience

Azure AI Foundry and Model Innovation

Azure AI Foundry becomes the go-to console for building, evaluating, and shipping AI systems:

  • Prompt flow adds human-in-the-loop review and automatic prompt optimisation.
  • Realtime Azure OpenAI debuts, combining speech, vision, and text in a single streaming API.
  • A new Phi-4 family (mini, medium, vision) provides lightweight open models via ONNX, TensorFlow, and PyTorch.
  • Two additional OpenAI o-series models arrive with better reasoning and coding benchmarks.

Azure AI Foundry

Windows AI Foundry and NLWeb

Microsoft extends the tooling to the edge with Windows AI Foundry, optimising on-device deployment across CPU, GPU, and NPU. Windows Subsystem for Linux (WSL) goes fully open source, and a new NLWeb project helps any website or API expose agent-ready MCP-compatible interfaces.

Windows AI Foundry overview

Data Platform Upgrades

  • Cosmos DB plugs directly into Fabric so AI agents can query semi-structured operational data alongside analytics.
  • Digital Twin Builder arrives inside Fabric for modelling physical systems.
  • OneLake shortcut transforms add AI-powered ETL templates that accelerate ingestion.

Fabric + Cosmos DB integration

Hardware Partnerships and Science

Azure will host the world’s largest GB200-based supercomputer in partnership with NVIDIA. Microsoft also introduced the Discovery Platform—a suite of specialised agents geared toward R&D in chemistry, life sciences, and physics.

Discovery platform

Keep Pace with BibiGPT

Build 2025 underscored Microsoft’s strategy: expand developer reach with agents, offer end-to-end tooling, and provide the infrastructure to run it all. Want to stay on top of events like this without watching hours of keynotes? Feed them into BibiGPT to get timestamped transcripts, structured highlights, and exports to your favourite note app. In the AI era, a smart summariser is indispensable.