Microsoft Pays Billions for Anthropic Claude to Fix Copilot's Office Shortcomings

Microsoft has committed to spending more than $2 billion annually on Anthropic's Claude models for Copilot despite having free access to OpenAI technology, the result of an internal campaign by new Office chief Charles Lamanna to plug critical gaps in productivity automation. Lamanna, now considered a potential successor to CEO Satya Nadella, convinced company leadership that Anthropic's Claude significantly outperformed OpenAI models at specific enterprise tasks—particularly automating complex financial functions in Excel and generating polished PowerPoint presentations. Customer complaints about Copilot's limitations in these core workflows had become acute, and internal testing confirmed Claude's superiority. "Claude's killed Copilot in PowerPoint and Excel," according to assessments within the company.