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's new family of models will continue to power Microsoft's suite of workplace and productivity apps.