While OpenAI and Anthropic have largely stayed out of China over fears of intellectual property theft and model misuse, Microsoft has been quietly building a massive AI business there. Microsoft sells access to OpenAI’s GPT series and other advanced models through its Azure cloud platform to Chinese firms, effectively acting as the middleman in a market that OpenAI itself won’t touch directly.
ByteDance leads a growing client roster
ByteDance, the parent company of TikTok, has become Microsoft’s largest Chinese customer and is projected to spend over $1 billion annually on AI and cloud services through Azure.
ByteDance isn’t alone. Ant Group, Meituan, and Tencent are also contributing to Azure’s growth in the region.
Azure’s AI revenue in China tripled during the fiscal year that ended in June 2025. The year before that, it grew 400%. Microsoft’s overall revenue from China still represented approximately 1.5% of its total revenue in 2024.
The security balancing act
OpenAI has raised concerns about potential abuses by Chinese customers. Microsoft’s approach has been to sell the access anyway, but with guardrails. The company has implemented automated monitoring systems and restricts sales to established companies rather than making its models available to anyone with a credit card.
While Azure operates data centers in China, those facilities do not host OpenAI models. Instead, Chinese customers access the models remotely through data centers located outside the country. This routing strategy is designed to make it significantly harder for anyone to steal the underlying model weights.
Model distillation doesn’t require access to weights. It can be done through API calls alone, which is precisely the kind of access Microsoft is selling.
Industry efforts and China’s own AI ambitions
Microsoft is a co-founder of the Frontier Model Forum, which was established in 2023 alongside other major AI firms. The forum’s stated goals include combating model distillation and enhancing collaboration between AI companies on safety issues.
Meanwhile, companies like DeepSeek have demonstrated that Chinese firms can build competitive models on their own.
What this means for investors
Microsoft’s China AI strategy represents a calculated bet. The company is monetizing a market that its closest AI partners won’t enter. ByteDance’s projected $1 billion-plus annual spend alone would make Microsoft’s China AI business meaningful even in isolation.
The Biden administration already restricted chip exports to China. AI model access could be next, particularly if there’s evidence of distillation or military-adjacent use cases. OpenAI has already flagged potential abuses, and a louder objection could put pressure on Microsoft to scale back.