OpenAI reaffirmed GPT 5.6 as the top choice for Microsoft Copilot 365, following reports of Microsoft integrating its in-house MAI models to reduce operational costs.

Microsoft will replace OpenAI and Anthropic models with its own AI in 365 Copilot. Anthropic's valuation hitting high $1.25T by December at 90.5% YES.

OpenAI reaffirmed GPT 5.6 as the top choice for Microsoft Copilot 365, following reports of Microsoft integrating its in-house MAI models to reduce operational costs.

Microsoft 365 Copilot now runs GPT-5.6 as its default model across Word, Excel, and PowerPoint, deepening the OpenAI partnership with day-zero enterprise

Microsoft is pivoting back to its primary partner OpenAI with a day-one integration of GPT-5.6 model series to supercharge Word, Excel, and PowerPoint.