Companies have paid dearly for McKinsey’s human expertise for nearly a century, relying on the firm’s armies of consultants to synthesize complex information, crunch huge amounts of data and map out solutions to thorny business challenges. But what happens now that AI can do much of that analysis in a matter of minutes—and deliver a slick PowerPoint deck to boot?… McKinsey has reduced its head count…and rolled out roughly 12,000 AI agents. These bots now assist consultants in building PowerPoint decks, taking notes and summing up interviews and research documents for clients.

Traditionally, a strategy project might have required a project leader, four consultants and a partner. Today, it might need a leader and two or three consultants—alongside a few AI agents and access to “deep research” capabilities. Bob Sternfels, head of McKinsey, said he sees a day in the not-too-distant future when McKinsey has one AI agent for every human it employs. “We’re going to continue to hire, but we’re also going to continue to build AI agents,” he said. 

Excerpt from Conor Grant, AI Comes for Consulting, McKinsey Faces an “Existential” Shift, WSJ, Aug. 8, 2025