Amazon Pumps Another $5B into Anthropic, Total Hits $13B with $100B AWS Pledge

Amazon completed a $5 billion investment in Anthropic on April 20, 2026, increasing its cumulative backing since 2023 to $13 billion, with potential for up to $20 billion more tied to business milestones. In exchange, Anthropic committed over $100 billion to AWS cloud infrastructure and chips across the next ten years, securing access to as much as 5 gigawatts of computing power, including current and future Trainium chips from Trainium2 to Trainium4. This deal builds on Anthropic's prior $30 billion Series G round in February 2026, led by GIC and Coatue at a $380 billion post-money valuation, amid surging revenue crossing $30 billion annualized run rate in April 2026.

The investment occurred at a $350 billion valuation, lower than the February mark and far below recent venture offers exceeding $800 billion that Anthropic has not accepted. Founded in 2021 by Dario and Daniela Amodei in San Francisco, Anthropic develops the Claude AI models and has grown into one of the world's most valuable private AI companies, doubling enterprise customers spending over $1 million annually to more than 1,000. This partnership locks in AWS as a core provider for Anthropic's compute needs, countering deals like its recent Broadcom collaboration for Google TPUs totaling 3.5 gigawatts.

The arrangement underscores intensifying competition in AI infrastructure, mirroring Amazon's prior $50 billion contribution to OpenAI's $110 billion round. It positions Anthropic for scaled Claude development and potential IPO as early as October 2026, amid secondary market valuations reaching $688 billion to $1 trillion implied figures. Amazon's stock rose about 3% following the announcement, highlighting market approval of the strategic tie-up.