Nov. 22 (UPI) -- Amazon said on Friday that it will provide $4 billion more into the San Francisco-based artificial intelligence startup Anthropic with its Amazon Web Service becoming its primary cloud and training partner. Anthropic, which was founded by former OpenAI research executives and now stands as one of its chief competitors, had already received $4 billion from Amazon, making its total investment in the company $8 billion. Amazon, however, remains a minority investor in the AI effort.