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Not all model upgrades are upgrades

A new model drops with lower per-token pricing and better benchmarks. You switch. A week later someone asks why the agent is burning 12x more tokens on the same task while producing worse output. We ran 150 agent tasks across 15 scenarios on two models, Claude Sonnet 4.6 and Claude...
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Jul 13, 2026
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Pure Virtual C++ 2026 [Meet the Speakers, Part 2]: The AI-Native C++ Developer Workflow

Marian Luparu
Pure Virtual C++ 2026 streams Tuesday, July 21, 2026 at 9:00 AM PT, a free, one-day virtual conference for the whole C++ community, live on YouTube (Microsoft Reactor) and Twitch, with on-demand recordings on the Visual Studio YouTube channel afterward. Register now → Welcome...
C++ Team Blog
Jul 13, 2026
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The Visual Studio Dev/Test Benefit: Freedom to Build, Test, and Experiment in Azure

James Rempt
One of the best parts of a Visual Studio Subscription is discovering benefits that can make your day-to-day development work easier and more cost effective. One benefit that deserves more attention is Azure Dev/Test pricing. In fact, it's one of the most valuable benefits...
Visual Studio Blog
Jul 13, 2026
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Why don't we just make the entire stack out of guard pages?

Raymond Chen
Guard pages all the way down?
The Old New Thing
Jul 10, 2026
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Go 1.26.5-2 Microsoft build now available

Davis Goodin
A new release of the Microsoft build of Go is now available for download.
Microsoft for Go Developers
Jul 10, 2026
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The case of the mysterious changes to integers when there shouldn't have been any code generation effect

Raymond Chen
Decoding where those integer came from.
The Old New Thing
Jul 10, 2026
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Shrinking Azure Pipeline task extensions using esbuild

David Paquette
TL;DR We bundled an internal Azure Pipelines task extension into a single bundled JavaScript file using esbuild. The task package dropped from tens of megabytes and thousands of files to three files per task ( script.js ,  task.json , and  icon.png ). The change took about 20 lines...
Azure DevOps Blog
Jul 10, 2026
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Microsoft Agent Framework for Go public preview

Quim Muntal
Microsoft Agent Framework for Go is entering public preview, bringing Agent Framework concepts to Go developers building agents and multi-agent workflows.
Microsoft for Go Developers
Jul 9, 2026
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Pure Virtual C++ 2026 [Meet the Speakers, Part 1]: Build Faster, Run Faster

Marian Luparu
Meet the speakers behind Pure Virtual C++ 2026. In part one, Ryan Shepherd and David Li show how to build faster and smaller with C++20 modules and GitHub Copilot build performance.
C++ Team Blog
Jul 9, 2026
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Modernize .NET applications in the GitHub Copilot app

Mika Dumont
Modernize .NET applications in the GitHub Copilot app. Follow your upgrade from assessment through execution in an interactive upgrade canvas.
.NET Blog