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Microsoft swaps OpenAI for MAI in Excel, Outlook.

7/9/2026

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Story summary
  • Microsoft is swapping OpenAI and Anthropic models for its own MAI models in Excel and Outlook, handling thousands of prompts.
  • MAI models also run GitHub Copilot and will power Teams speech transcription soon.
  • At June’s Build, Microsoft unveiled seven AI models, including one matching Anthropic’s Opus 4.6.
  • Exec VP Jacob Andreou merged consumer and enterprise Copilot into an August app and closed Podcasts and Labs.