Microsoft shifts GitHub Copilot and Office apps to its own AI models, cutting OpenAI reliance
Microsoft is redirecting AI workloads in GitHub Copilot, Excel, and Outlook from OpenAI and Anthropic models to its own in-house MAI model family. CEO Satya Nadella explained the strategy on X, stating that frontier models should only be used for frontier-level problems, while routine tasks should run on cheaper proprietary models. Microsoft claims its Excel-specific model performs on par with GPT-4.5 at ten times the efficiency. Copilot Chat and PowerPoint are among the next products slated for the transition. The move signals a broader push by Microsoft to reduce costs and dependency on third-party AI providers.
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