Meta Platforms has become one of Microsoft’s largest AI customers, according to Bloomberg, in a sign that some of the biggest buyers of artificial intelligence infrastructure remain the technology companies building AI products themselves. Bloomberg reports, citing a person familiar with the matter, that Meta is spending hundreds of millions of dollars a year to access AI models through Microsoft’s Azure cloud service. Techmeme’s aggregation of the Bloomberg report says Meta is using Azure to consume trillions of AI tokens weekly. The report is notable because Meta is itself one of the largest investors in AI infrastructure and model development. The provided reporting does not specify which AI models Meta is accessing through Azure, what workloads they support, or how long the arrangement has been in place. For Microsoft, the reported spending reinforces Azure’s role as a major distribution and consumption layer for AI systems. For Meta, it shows that even companies with large internal AI programs may still rely on external cloud capacity or model access where it fits operational needs. The sourcing is narrow: the core spending figure comes from Bloomberg’s person familiar with the matter, and Techmeme is summarizing that same report rather than adding independent confirmation. The material facts supported by the cluster are therefore limited to Meta’s reported annual Azure spending, its status as a large Microsoft AI customer, and the Bloomberg-sourced token-consumption scale. Who benefits: Microsoft benefits if Meta’s reported Azure usage translates into durable AI cloud revenue. Azure’s AI model-access business also gains validation from a large technology customer with demanding workloads. Who's exposed: The report leaves exposure harder to measure for Meta because the provided sources do not describe margins, contract terms, or workload dependencies. Cloud rivals are exposed only in the broad sense that large AI customers may consolidate meaningful spend with a small number of providers.