OpenAI Backs Amazon, Bashes Microsoft and Anthropic
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- OpenAI is tightening ties with Amazon while saying early investor and partner Microsoft was "holding it back," with new revenue chief Denise Dresser declaring the AWS cloud partnership has generated "frankly staggering" enterprise demand.
- Dresser wrote that OpenAI's Microsoft partnership "has also limited our ability to meet enterprises where they are" — specifically on Amazon's Bedrock platform, which provides clients access to all major AI models.
- Amazon recently announced a $50 billion investment in OpenAI and a deal to become the exclusive third-party cloud distribution provider for OpenAI Frontier, the company's new agent-management platform.
- Dresser also attacked rival Anthropic in the memo, saying the Claude creator builds its narrative "on fear, restriction, and the idea that a small group of elites should control AI."
- Dresser accused Anthropic of an "inflated" run rate, claiming it uses accounting methods to make its "revenue look bigger than it is"; Anthropic had no immediate comment.
- Microsoft began listing OpenAI as a competitor in 2024 and declined to comment for this story, reflecting a tension the article describes as "palable" for years.
Why it matters: The realignment is anchored by a $50 billion Amazon investment and an exclusive cloud distribution deal for OpenAI Frontier. With a potential IPO on the horizon, OpenAI is publicly framing Microsoft as the bottleneck on enterprise growth while undermining Anthropic's revenue credibility — a posture that reshapes the competitive map heading into public markets.
