The most stable "money friendship" in Silicon Valley is beginning to crack.

According to multiple sources, Microsoft is sternly warning its long-time partner OpenAI that its $50 billion cloud service partnership with Amazon may violate their previous exclusive agreement. If mediation fails, this tech giant does not rule out taking legal action against OpenAI and Amazon.

The core of this billion-dollar dispute lies in OpenAI's enterprise-level flagship product, Frontier, launched last month. According to the cooperation between Amazon and OpenAI, OpenAI will purchase a large amount of cloud resources from AWS. Meanwhile, Microsoft insists that according to multiple investment agreements since 2019, all API calls for OpenAI's models must be made through the Azure platform.

To bypass Microsoft's exclusive terms, Amazon and OpenAI played a "word game":

"Stateful" system: The two parties jointly developed a system called SRE (Stateful Runtime Environment).

Logical debate: They argued that by integrating enterprise data on the AWS Bedrock platform, giving AI agents memory and context capabilities, this constitutes a "stateful" layer operation, rather than directly calling OpenAI's "stateless" base model.

Strict confidentiality: Amazon even prohibited employees from using words like "access" or "call" to describe the product in internal memos, to avoid angering Microsoft.

However, Microsoft's top executives are not convinced, believing that even if this technical approach does not violate the contract terms, it seriously violates the "spirit of the contract."

For OpenAI, this lawsuit could not have come at a worse time. CEO Sam Altman is currently embroiled in legal disputes with Elon Musk. Analysts are concerned that if the dispute with Microsoft escalates into court, it might directly hinder OpenAI's ambitious plan to go public by 2026.

From former deep allies to now tense confrontations, OpenAI's attempt to relax contract restrictions and seek diversified cloud services has touched Microsoft's core business, Azure. When AI giants begin to test the legal boundaries, this contest over computing power sovereignty and exclusive agreements may reshape the global AI market's interest distribution pattern for years to come.