Microsoft replaces OpenAI image models in PowerPoint, Bing with MAI

Microsoft is replacing OpenAI's image-generating models with its own MAI models in PowerPoint and Bing, according to a Bloomberg report. Mustafa Suleyman, Microsoft's model chief, said the new models are "faster, cheaper, higher quality" and drive better retention. For AI builders, this signals a strategic shift: Microsoft is internalizing AI capabilities to reduce dependency on external providers and control costs at scale.

What happened

Bloomberg reports that Microsoft is substituting OpenAI's image-generation models with its own MAI models in select apps like PowerPoint and Bing. The company has been testing MAI-Image-2 in Bing and PowerPoint, and MAI-Transcribe-1 across Teams and Copilot. This follows a broader trend where Microsoft has been routing some Excel and Outlook prompts to MAI models to reduce enterprise AI inference costs.

Why AI builders should care

This move illustrates a broader enterprise AI trend: large tech incumbents are moving toward in-house models to control cost, latency, and roadmap. For developers building on Azure AI, this could reshape pricing and licensing dynamics. Microsoft launched seven first-party MAI models at Build 2026, creating a direct alternative to OpenAI's offerings on Azure and potentially reducing costs for developers.

Practical implications

For developers and product teams, this signals potential changes in how AI capabilities are accessed in Microsoft 365. As MAI models roll out, API usage and integration points may shift. The move also puts pressure on OpenAI and Anthropic as Microsoft reduces reliance on third-party models. Microsoft is quietly moving Word and Excel away from OpenAI as a margin play, since paying third-party API fees for every user query is a massive variable cost at scale.

Caveats

The evidence comes from Bloomberg and related tech reports; details may evolve as Microsoft expands its MAI rollout. Exact benchmarks, pricing differences, and rollout timelines are not yet published. The replacement appears gradual and product-specific, with OpenAI models still used in other Microsoft products like Copilot with GPT-5.6.

FAQs

Microsoft MAI image models are the company's in-house AI models for image generation, replacing third-party models like OpenAI's DALL-E in some products. The model being rolled out is MAI-Image-2, which Microsoft has been testing in Bing and PowerPoint.