Meta and Microsoft Reduce Internal Claude Use as Anthropic Faces Customer Concentration Test Before IPO

Meta and Microsoft are moving to cut employee use of Anthropic's Claude while steering staff toward their own AI tools, creating a fresh pressure point for one of the fastest-growing frontier AI companies as it prepares for a public listing. The pullback affects internal use, not the companies' customer-facing resale of Claude models, but it highlights a central tension in the AI market: the same technology giants buying frontier models are also building alternatives.