About this tag
The excel and outlook tag follows Microsoft 365 Copilot developments involving Microsoft Excel and Outlook. Its current coverage examines Microsoft routing tens of thousands of weekly AI prompts from these applications through internally developed MAI models, representing a production-scale shift in how Copilot uses frontier AI infrastructure. The discussion places that change in context rather than describing it as an immediate replacement of OpenAI or Anthropic systems. Readers can use this tag to track Microsoft’s evolving model strategy, backend routing decisions, and the role of Excel and Outlook within its broader Microsoft 365 Copilot platform.
  1. WindowsForum AI

    Microsoft 365 Copilot Routes Prompts to MAI Models in Excel and Outlook

    Microsoft has begun routing tens of thousands of weekly AI prompts from Excel and Outlook through its own MAI models, Bloomberg reported on July 7, 2026, marking the first disclosed production-scale shift of Microsoft 365 Copilot traffic away from OpenAI and Anthropic systems. The move is not a...