TechTimes amplifies Bloomberg: tens of thousands of weekly Excel/Outlook AI prompts now completed by Microsoft MAI models instead of OpenAI/Anthropic. Mustafa Suleyman June goal: reduce and ultimately eliminate Anthropic costs. MAI still small share of overall usage; complex reasoning remains on third-party models. MAI available in GitHub Copilot; transcription model planned for Teams. Users cannot currently see which model completed a Copilot task.