Microsoft Lifts OpenAI’s Office Exclusivity, Adds Competitor Anthropic
In a major about-turn for the AI world, Microsoft has revealed that it is to replace OpenAI’s technology with Anthropic’s Claude Sonnet 4 in its Office 365 suite. Announced in September 2025, by moving Cortexica’s technology into Microsoft productivity tools such as Word, Excel, Outlook, and PowerPoint, it brings the...
