AI Summary
Microsoft is transitioning from using OpenAI and Anthropic models to its own AI technology in applications like Excel and Outlook. This change aims to reduce costs associated with third-party AI services.

- Microsoft is replacing OpenAI and Anthropic AI models with its own internally developed models in some applications.
- This shift is occurring in widely used software products such as Excel and Outlook.
- Tens of thousands of AI prompts in these applications are now being processed weekly using Microsoft's MAI models.
- The decision is part of Microsoft's strategy to lower AI-related expenses.
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