Microsoft's consumer AI tool, Copilot, has experienced stagnant user growth over the past year, maintaining approximately 20 million weekly users, according to an internal presentation by CFO Amy Hood. This contrasts sharply with OpenAI's ChatGPT, which expanded to 400 million users during the same period. Mustafa Suleyman has been leading efforts to revitalize Copilot for the past year, but the tool remains considerably smaller and less competitive compared to ChatGPT. The internal data was described as sobering for Microsoft's consumer AI team, highlighting the challenges the company faces in competing with OpenAI's rapidly growing AI platform.