Amazon Opens World's Largest AI Data Center in Indiana as $11 Billion Project Rainier Begins Training Claude Models

Oct 30, 2025
CNBC
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Summary

Amazon launches the world's largest AI data center in Indiana as part of its $11 billion Project Rainier, spanning 1,200 acres with 500,000 custom Trainium chips to train Anthropic's Claude models, while local residents worry about farmland loss and soaring utility costs.

Key Points

  • Amazon opens its $11 billion Project Rainier AI data center in Indiana, spanning 1,200 acres and representing the largest operational AI facility in the world dedicated to training Anthropic's Claude models
  • The facility runs entirely on Amazon's custom Trainium chips rather than Nvidia GPUs, with 500,000 chips currently operational and expected to reach one million by year-end
  • Local residents express concerns about losing farmland and rising utility costs as peak power demand doubles by decade's end, while Amazon plans continued expansion to meet customer capacity needs

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