Since last September, the tech giant has pumped $8 billion into the artificial intelligence start-up, a sign of intense competition in developing tools that are reshaping the tech sector.

Amazon.com plans to double its investment in artificial intelligence (AI) startup Anthropic to $8 billion. Despite the increased funding, Amazon will remain a minority investor, Anthropic stated in a blog post on Friday.

Amazon, which is Anthropic’s primary cloud partner, is fiercely competing with Microsoft and Alphabet’s Google to offer AI-powered tools for its cloud customers.