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 is investing the additional $4-billion in Anthropic as part of an expanded alliance that includes working together on "Trainium" hardware to optimise machine learning, according to the companies.

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