Microsoft
Developer Blogs

February brings Anthropic's Claude Opus 4.6 and Sonnet 4.6 with 1M-token context, GPT-Realtime-1.5 and GPT-Audio-1.5, Grok 4.0 GA, the Microsoft Agent Framework reaching Release Candidate, and the Foundry REST API v1 quietly going GA — laying the foundation for imminent SDK GA announcements across Python, .NET, JS/TS, and Java.

We’re improving how add-ins appear on the ribbon in Outlook on the web and the new Outlook on Windows. These updates make add-ins easier to find and align the experience across Outlook clients.

Today we are excited to announce the Release Candidate (RC) of TypeScript 6.0! To get started using the RC, you can get it through npm with the following command: npm install -D typescript@rc TypeScript 6.0 is a unique release in that we intend for it to be the last release based on...

A new release of the Microsoft build of Go including security fixes is now available for download.

It's already gone. If you need more information, you should have been remembering it.

When setting up an experiment is complex, agents can automate the process to make it faster and more reliable.

Join us at GDC Festival of Gaming 2026 for a deep dive into Visual Studio, GitHub Copilot, PowerToys, and the Windows tools that speed up your daily dev workflow. We'll show how these tools work together to boost productivity and cut friction across your entire inner loop. Session...

We briefly paused our quarterly release cycle to focus on reliability and performance, but now we're back with Windows Terminal 1.25! We are also updating Windows Terminal stable to version 1.24, which will include all of the features from this previous blog post. Some notable features...

Discover what’s new in the v1.0 release of the official MCP C# SDK, including enhanced authorization, richer metadata, and powerful patterns for tool calling and long-running requests.