Anthropic takes $5 billion from Amazon and pledges $100 billion in return

Amazon just doubled down on Anthropic in the most expensive way possible. The e-commerce giant announced a fresh $5 billion investment on Monday, bringing its total stake to $13 billion. But this isn’t charity. Anthropic agreed to spend over $100 billion on AWS over the next decade.The circular deal structure mirrors Amazon’s arrangement with OpenAI two months ago. In February, Amazon contributed $50 billion to OpenAI’s $110 billion funding round. That valuation hit $730 billion pre-money. Like that deal, much of the Anthropic commitment is structured as cloud infrastructure purchases rather than cash.The chip angle mattersAt the heart of this agreement sits Amazon’s custom silicon. Anthropic will train and run Claude on Trainium chips - Trainium2 through Trainium4 - with the option to buy future generations as they release. Trainium3 launched in December. Trainium4 doesn’t exist yet. Anthropic secured the right to purchase it anyway.This matters because Nvidia’s dominance is starting to crack. When a frontier lab like Anthropic bets this heavily on alternative hardware, it signals confidence in non-CUDA performance. Amazon claims Trainium offers comparable throughput at significantly lower cost.Anthropic already uses over one million Trainium2 chips for Project Rainier, one of the world’s largest compute clusters. The new agreement secures up to 5 gigawatts of additional capacity. Nearly 1 gigawatt comes online by year-end.The revenue story is wildAnthropic disclosed its run-rate revenue now exceeds $30 billion. That’s up from roughly $9 billion at the end of 2025. 3x growth in four months. The consumer side is exploding too - free, Pro, and Max tier usage has spiked enough to cause reliability issues during peak hours.The company claims over 100,000 customers already run Claude through Amazon Bedrock. Now the full Claude Platform will integrate directly into AWS with unified billing and credentials. No separate contracts. Claude becomes the only frontier model available on all three major clouds: AWS Bedrock, Google Cloud Vertex AI, and Microsoft Azure Foundry.The broader patternCloud providers are becoming AI investors by necessity. Microsoft owns significant OpenAI equity. Google backs Anthropic too. Now Amazon is matching that firepower. The $5 billion injection can expand to $25 billion total if Amazon exercises all future options.These circular deals - cloud credits for equity, compute commitments for investment - reshape how AI companies capitalize. Traditional venture rounds look quaint when training runs cost billions and inference demands keep growing. The labs need infrastructure more than cash. The clouds need exclusive supply deals more than revenue.Dario Amodei, Anthropic’s CEO, acknowledged the strain. “Our unprecedented consumer growth has impacted reliability.” The $100 billion commitment is infrastructure therapy. Amazon gets a locked-in customer for a decade. Anthropic gets the compute to compete with OpenAI’s scale.Both sides are betting that demand for frontier AI keeps climbing. Based on that revenue growth, it’s not a bad bet.