Amazon shares rose about 2.8% to $255.26 in premarket trading Tuesday, April 21, after the company said it will invest up to $25 billion more into Anthropic. Amazon has already invested $8 billion in the artificial intelligence startup, bringing its total commitment to as much as $33 billion.

The deal announced Monday, April 20, includes $5 billion upfront at Anthropic’s latest valuation of about $380 billion, with up to $20 billion in additional funding tied to commercial milestones. In return, Anthropic said it will spend more than $100 billion on Amazon Web Services over the next decade, securing up to 5 gigawatts of compute capacity on Amazon’s Trainium chips to train and run its Claude models.

“Anthropic’s commitment to run its large language models on AWS Trainium for the next decade reflects the progress we’ve made together on custom silicon, as we continue delivering the technology and infrastructure customers need to build with generative AI,” Amazon CEO Andy Jassy said in the announcement.

Anthropic said the expanded agreement reflects a deeper alignment on long term infrastructure. “This expanded partnership reflects our shared commitment to building reliable and scalable AI systems,” the company said in its announcement.

IBM Shares Sink 13% After Anthropic Says Claude Can Modernize COBOL
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