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Microsoft to Reveal Homegrown Coding Model at Build 2026

The announcement signals Microsoft is moving to build its own AI stack, boost GitHub Copilot usage, and reduce dependence on external model partners.

Overview

  • Multiple reports said on Thursday, May 28, that Microsoft will unveil a new in-house coding model next week at its Build developer conference in San Francisco, though the company declined to provide technical details.
  • The coding model is reported to be part of a suite of specialized homegrown models that also target transcription, reasoning, speech, and images, according to people cited by the reporting outlets.
  • Microsoft has not disclosed the model’s name, size, architecture, training benchmarks, or exact release timing, so the details and availability remain unconfirmed.
  • Analysts note Microsoft can draw on large internal code stores such as GitHub repositories and Azure deployments for training data, and the report said the reveal has pushed Microsoft shares higher by about 3 percent.
  • The move follows product shifts like open-sourcing the Copilot VS Code extension and moving Visual Studio Code to weekly releases and may be paired with possible AI startup buys to speed talent and capability gains.