Microsoft is reportedly shifting some of its AI workloads from pricier third-party providers to its own cheaper models as costs climb. According to Bloomberg, tens of thousands of weekly AI prompts inside Excel and Outlook are now handled by Microsoft's internal MAI systems, replacing models from OpenAI and Anthropic. Mustafa Suleyman, CEO of Microsoft AI, acknowledged the financial pressure, noting that many employees across the organization are each spending millions of dollars on AI tokens—the units that measure computational usage. The company has introduced several new models aimed at lowering these expenses, including a reasoning-focused one. This cost-cutting move matters as the industry increasingly prioritizes more affordable, efficient AI options, with rivals like DeepSeek offering significantly lower token prices.