Microsoft is transitioning to proprietary artificial intelligence models, codenamed MAI, to power features within Excel and Outlook.
The shift reduces reliance on partners like OpenAI and Anthropic for tens of thousands of weekly AI-driven prompts.
Developing internal technology allows the company to lower substantial usage fees paid to external providers. Microsoft expects this strategy to improve long-term profitability and provide greater control over its core technology.
New MAI models are currently being integrated across the broader product suite, including Teams and GitHub Copilot.