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Amazon Deepens Anthropic Partnership with New $5 Billion Investment and Potential $20 Billion More

• By John K. Waters
• 04/21/2026

Amazon said on Tuesday it would invest $5 billion in Anthropic immediately and up to an additional $20 billion tied to commercial milestones, deepening its partnership with the artificial intelligence startup as the two companies expand their cloud and chip collaboration.

The deal adds to the $8 billion Amazon had already invested in the San Francisco-based startup. Amazon also said Anthropic had committed to spending more than $100 billion over the next 10 years on Amazon Web Services technologies, including current and future generations of Trainium chips and tens of millions of Graviton CPU cores.

Amazon said Anthropic would secure up to 5 gigawatts of capacity to train and run its AI models, including significant Trainium3 capacity expected to come online this year. The companies said the arrangement would also expand Anthropic’s inference footprint in Asia and Europe to serve international demand for its Claude models.

The announcement underscores the growing competition among major cloud providers to tie leading AI model developers more closely to their infrastructure. Amazon said more than 100,000 customers now run Anthropic’s Claude models on AWS, making Claude one of the most widely used model families on Amazon Bedrock.

As part of the expanded relationship, AWS customers will also be able to access Anthropic’s native Claude console through their AWS accounts, without separate credentials, contracts or billing arrangements, according to Amazon.

“Our custom AI silicon offers high performance at significantly lower cost for customers, which is why it’s in such hot demand," Amazon CEO Andy Jassy said in the statement. "Anthropic's commitment to run its large language models on AWS Trainium for the next decade reflects the progress we've made together on custom silicon, as we continue delivering the technology and infrastructure our customers need to build with generative AI.”

Anthropic CEO and co-founder Dario Amodei said demand for Claude was driving the buildout. "Our users tell us Claude is increasingly essential to how they work, and we need to build the infrastructure to keep pace with rapidly growing demand,” he said. "Our collaboration with Amazon will allow us to continue advancing AI research while delivering Claude to our customers, including the more than 100,000 building on AWS."

Amazon said Anthropic remains its primary training and cloud customer for mission-critical workloads, while the two companies continue collaborating on Project Rainier, an AI compute cluster built with nearly half a million Trainium2 chips. Amazon also cautioned that the announcement included forward-looking statements about planned investments, expected benefits and chip delivery timing that are subject to uncertainty.