Amazon has unveiled Project Rainier, a massive $11 billion AI data center that is already operational. The sprawling 1,200-acre facility is powered by nearly 500,000 of Amazon's own Trainium2 chips, marking a significant breakthrough in the company's AI infrastructure capabilities and its ability to execute large-scale projects ahead of competitors. This new supercomputing hub is already being used to train advanced AI models for Anthropic, the startup behind the "Claude" AI. Anthropic plans to scale its operations to over a million Trainium2 chips via AWS by the end of the year, with the Rainier infrastructure set to support future versions of its models. This move underscores Amazon's aggressive push to capture the surging demand for AI compute, directly challenging other tech giants like Meta and Alphabet who are also racing to build out their own supercomputing capacities.