Amazon has launched its $11 billion Rainier project in rural Indiana, aimed at training Anthropic's Claude AI models using over one million Trainium 2 chips. The initiative, which spans 1,200 acres, is already operational with 500,000 chips in use. The project is financially supported by $8 billion from Amazon and $3 billion from Google. Anthropic's Claude models, benefiting from this infrastructure, now serve over 300,000 businesses, marking a 300-fold increase in users over the past two years.