Microsoft Swapping Out OpenAI/Anthropic Models in Office Products
Microsoft is actively replacing third-party frontier models with its own MAI models inside Excel and Outlook, primarily to reduce AI costs
For AI PMs in large enterprises, this is a signal that even hyperscaler vendors face internal build-vs-buy pressure โ any product roadmap built around a single third-party model vendor carries meaningful substitution risk, and procurement and architecture decisions should include model-portability requirements