April 13, 2026

OpenAI memo highlights demand for Amazon Bedrock, critiques Anthropic’s compute strategy

Anthropic has acknowledged challenges stemming from its partnership with Microsoft, stating that while it has been crucial to their success, it has limited their ability to compete effectively with emerging alternatives like Amazon Bedrock. Following the announcement of the partnership with Amazon in February, there has been significant enterprise interest, which Anthropic notes is outpacing its own efforts. Additionally, Anthropic recognized a strategic mistake in not securing enough compute resources, stating that this has put them at a disadvantage compared to OpenAI, whose growth is significantly ahead.

OpenAI: OpenAI builds advanced generative AI models powering tools like ChatGPT and enterprise applications.45 It announced a partnership with Amazon in late February to offer models via Bedrock amid tensions with Microsoft.0 The internal memo from its Chief Revenue Officer touts staggering demand for the Amazon offering while highlighting advantages over Anthropic.
Anthropic: Anthropic develops the Claude family of AI models with a focus on safety and reliability, partnering with cloud providers for distribution.20 It recently launched a cybersecurity partnership with major tech firms including Microsoft and Amazon.54 The OpenAI memo criticizes Anthropic for a strategic misstep in not acquiring enough compute, placing it behind OpenAI’s scaling efforts.
Microsoft: Microsoft is a leading technology company providing Azure cloud services and AI-enhanced productivity tools like Copilot.22 It has recently expanded to integrate Anthropic’s Claude models into Copilot Cowork while maintaining its core partnership with OpenAI.25 In the leaked OpenAI memo, the partnership is described as foundational yet limiting access to enterprises using Amazon Bedrock.

`json
{
“Amazon Partnership”: “OpenAI’s alliance with Amazon Bedrock, announced at the end of February, is attracting significant enterprise interest as an alternative to Microsoft Azure.”,
“Compute Challenges”: “Major AI firms including Anthropic are grappling with compute shortages described as scaling hurdles.”
}
`

Sources