Microsoft Quietly Shifts Thousands of Office Prompts to In-House AI

Microsoft has begun using its own MAI artificial intelligence models rather than those of OpenAI and Anthropic to complete prompts in its spreadsheet and email applications, Excel and Outlook, Bloomberg reported Tuesday (July 7), citing unnamed sources. While there have been previous reports that Microsoft plans to transition to its own AI models, the fact that the company’s MAI is now handling tens of thousands of prompts in those applications each week was not previously known, according to th