Microsoft is contemplating legal action against both Amazon and OpenAI. The holding company is concerned that the new software provided by these firms might breach the exclusive agreement covering cloud infrastructure provisioning for the ChatGPT creator’s models.
Microsoft is reportedly weighing a lawsuit against Amazon and OpenAI over the launch of their new commercial product, Frontier, which is alleged to violate an exclusive pact regarding the provision of cloud computing resources for ChatGPT’s underlying models. Sources familiar with the matter, as reported by the Financial Times, indicate that a previously struck $50 billion deal between the parties is the root of this conflict.
The dispute centers on whether Amazon Web Services (AWS) is permitted to market Frontier—an AI agent platform designed for business solutions—without violating the terms of a contract stipulating that all access to OpenAI’s models must occur via Microsoft’s Azure cloud platform. This agreement has been in effect since 2019, following Microsoft’s $1 billion investment in the startup, and was reaffirmed during the October 2025 restructuring. Although Microsoft conceded on overall cloud service exclusivity at that time, the clause pertaining to API calls (requests from one application to another) remained intact.
According to insiders, Microsoft executives maintain that the Stateful Runtime Environment (SRE) system, which Amazon and OpenAI plan to run on the Amazon Bedrock platform, will inevitably utilize OpenAI’s APIs, thereby contravening the existing arrangement. “We are aware of the terms of our contract. We will sue them if they violate it,” stated an individual acquainted with Microsoft’s stance.
OpenAI, conversely, asserts that its collaboration plans with Amazon do not conflict with the Microsoft agreement. To avoid escalating tensions with Microsoft, an internal Amazon memo reveals that AWS personnel have been instructed not to use language indicating that SRE “provides access” to ChatGPT or employs OpenAI’s most advanced models. Only phrases such as “runs on,” “is powered by,” or “integrates with” OpenAI are deemed acceptable. This legal entanglement could severely jeopardize OpenAI’s IPO aspirations, which are already under strain due to Elon Musk’s lawsuit against CEO Sam Altman. “The last thing OpenAI needs right now is more litigation,” commented one source.
Nevertheless, Microsoft is unlikely to pursue an open court battle, given the ongoing antitrust scrutiny in the US, UK, and EU pertaining to its alleged anticompetitive practices in Azure licensing. The companies are currently engaged in ongoing discussions, hoping to resolve the disagreement outside of litigation.
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