Amazon just wrote Anthropic a $5 billion check and got an over $100 billion cloud commitment in return: ten years, up to 5 gigawatts of Trainium capacity, all tied to AWS.
The deal covers Trainium2 through Trainium4 chips, Amazon’s custom AI accelerators competing with Nvidia. Trainium3 launched in December. Trainium4 doesn’t exist yet, but Anthropic still secured the option to buy capacity on it, and on every Amazon chip that follows. The commitment runs so far ahead of current silicon that it reads as a long-dated bet on Amazon’s chip roadmap, not just today’s infrastructure.
Amazon’s total stake in Anthropic is now $13 billion. Two months ago, Amazon joined OpenAI’s $110 billion round, contributing $50 billion at a $730 billion pre-money valuation. Both deals are structured partly as cloud infrastructure services rather than straight cash. Amazon is clearly buying AI relationships at scale.
If you’re building on Claude’s API, your infrastructure supplier just tied its compute to AWS for a decade. That’s vendor concentration risk with a 10-year tail. If AWS pricing moves, Anthropic’s cost base moves — and margin pressure trickles into API pricing. Factor that into your vendor diligence before you commit to Claude at scale.
VCs are reportedly circling Anthropic at an $800 billion-plus valuation. If a round closes at that number, Amazon’s $13 billion looks like a bargain.
Nathan Zakhary