OpenAI rips Anthropic, distances itself from Microsoft

Axios
by Nathan Bomey
April 13, 2026
2 min read

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OpenAI is strengthening its partnership with Amazon Web Services and distancing itself from Microsoft.

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Increased competition in the AI market could lead to more innovative and diverse AI products and services for consumers and businesses.

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OpenAI is strengthening its ties with Amazon and distancing itself from early investor Microsoft, citing limitations in its ability to serve enterprise customers. OpenAI's new revenue chief, Denise Dresser, stated in an internal memo that its cloud partnership with Amazon Web Services has generated "frankly staggering" demand. Dresser noted that while the Microsoft partnership was "foundational," it "has also limited our ability to meet enterprises where they are," often on Amazon's Bedrock platform. This shift follows Amazon's recent $50 billion investment in OpenAI and a deal to become the exclusive third-party cloud distribution provider for OpenAI Frontier. Dresser also criticized rival Anthropic, accusing its CEO Dario Amodei of building a narrative "on fear" and using "inflated" accounting methods for its run rate.

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