OpenAI's cloud tug‑of‑war

OpenAI is telling staff that Amazon Web Services is opening enterprise doors that Microsoft did not. (cnbc.com) In a memo sent Sunday, April 13, chief revenue officer Denise Dresser wrote that Microsoft had “limited our ability” to meet customers “where they are,” and said many enterprise buyers are on Amazon Bedrock. CNBC reported the memo on April 13 after reviewing it. (cnbc.com) Dresser wrote that demand since the late-February Amazon announcement had been “frankly staggering.” She told CNBC earlier in April that enterprise now makes up 40% of OpenAI revenue and is on track to match consumer revenue by the end of 2026. (cnbc.com) The Amazon deal is not a simple reseller agreement. On February 27, OpenAI said Amazon would invest $50 billion, Amazon Web Services would become the exclusive third-party cloud distributor for OpenAI Frontier, and OpenAI would use 2 gigawatts of Amazon Trainium capacity. (openai.com) Amazon and OpenAI said the companies are also building a “Stateful Runtime Environment” for Amazon Bedrock, which is a managed service that lets companies use outside artificial intelligence models inside Amazon’s cloud. OpenAI said that system is meant to help software agents keep context, use tools, and work across company data. (openai.com) Microsoft’s side of the relationship changed before this memo. On January 21, 2025, Microsoft said it was no longer OpenAI’s exclusive infrastructure provider and would instead get a right of first refusal when OpenAI needed more computing capacity. (blogs.microsoft.com) Microsoft also said on January 21, 2025 that key terms still run through 2030, including revenue-sharing and Azure’s exclusivity for the OpenAI application programming interface. CNBC reported the same day that OpenAI would continue increasing Azure use under a new large commitment. (blogs.microsoft.com) (cnbc.com) That leaves OpenAI trying to do two things at once: keep Microsoft as a major investor and infrastructure partner while using Amazon Web Services to reach companies that already buy artificial intelligence through Bedrock. CNBC said Microsoft has invested more than $13 billion in OpenAI since 2019. (cnbc.com) The sales fight sits inside a wider model fight. CNBC reported that OpenAI is pushing harder into enterprise as Anthropic’s Claude gains traction with corporate buyers and Google’s Gemini competes for the same budgets. (cnbc.com) For now, OpenAI’s message is that cloud access is becoming a distribution battle as much as a computing one. The memo turns that argument into public positioning: Azure is still in the picture, but Amazon Bedrock is now part of the pitch. (cnbc.com) (openai.com)