Microsoft swaps OpenAI and Anthropic models for in-house MAI in Copilot to cut costs

微软为降成本在Copilot中用自研MAI模型替换OpenAI和Anthropic模型

Microsoft is replacing OpenAI and Anthropic models with its own MAI models in Copilot products like Excel and Outlook. MAI currently handles a small share of requests, but the goal is to phase out third-party model spending over time. AI head Mustafa Suleyman said in June that Anthropic costs are too high and Microsoft aims to eliminate them. Customers may get weaker models for the same subscription price; third-party models could later become paid add-ons. Microsoft markets MAI training data as clean and commercially licensed, but its technical paper confirms use of Common Crawl, whose legal status for AI training remains unsettled.

Why it matters: Microsoft is swapping OpenAI and Anthropic models in Copilot for its own MAI models, with Mustafa Suleyman publicly stating Anthropic is too expensive and the goal is to zero out that cost. It's a concrete signal of in-house model adoption at a major platform. Currently MAI on...