Microsoft (MSFT) Microsoft Build 2025 Opening Keynote summary

Key announcements and platform vision

• Emphasis on the shift to an open, agentic web, enabling scalable, multi-agent applications for developers across all layers of the stack.

• Major updates to developer tools: Visual Studio gains .NET 10 support, live preview, improved Git tooling, and monthly stable releases; VS Code celebrates its 100th open release with enhanced multi-window support.

• GitHub Copilot is now open sourced in VS Code, with AI-powered capabilities integrated directly and expanded from code completion to autonomous agents.

• Introduction of autonomous agents for SRE and coding, allowing developers to delegate tasks, bug fixes, and feature implementation to Copilot, with robust security and compliance controls.

• OpenAI's Codex agent and xAI's Grok model are now integrated, expanding model choices and agentic capabilities.

Developer empowerment and ecosystem expansion

• Developers can now build, fine-tune, and orchestrate agents using Copilot Studio and Copilot Tuning, enabling enterprise-grade, customized AI workflows.

• Multi-agent orchestration allows complex business processes to be automated, with agents collaborating across domains like HR, finance, and compliance.

• Copilot and Teams integration enables agents to be published, discovered, and distributed to hundreds of millions of users.

• Real-world examples include agents for Workday, ServiceNow, and LSEG, as well as Stanford Medicine's healthcare agent orchestrator for tumor board meetings.

AI infrastructure, models, and data stack

• Foundry emerges as a comprehensive app platform supporting 1,900+ models, including OpenAI, Grok, Mistral, and Llama, with a new model router for automatic selection.

• Provisioned throughput can now be shared across multiple models, simplifying deployment and cost management.

• Expanded partnerships with Hugging Face and support for 11,000+ open-source models.

• Advanced retrieval and orchestration layers enable sophisticated RAG applications and multi-agent workflows.

• Observability, security, and governance are enhanced with Entra ID, Purview, and Defender integrations.