Amazon.com pumped another $4 billion into OpenAI competitor Anthropic, as the e-commerce giant goes up against Big Tech rivals in a race to capitalize on generative artificial intelligence technology.

Amazon.com Inc. is boosting its stake in OpenAI rival Anthropic, builder of the Claude generative artificial intelligence software.

Amazon is doubling its investment in Anthropic to $8 billion in a deepened collaboration on artificial intelligence, the companies said Friday. Amazon is investing the additional $4 billion in Anthropic as part of an expanded alliance that includes working together on "Trainium" hardware to optimize machine learning,