Nov 22 (Reuters) - Artificial intelligence startup

Anthropic said on Friday it has raised an additional $4 billion

investment from longtime backer Amazon.com ( AMZN ),

underscoring Big Tech's growing genAI investments.

This will bring Amazon's ( AMZN ) total investment in Anthropic to $8

billion, while maintaining its position as a minority investor,

the company said.

Amazon's ( AMZN ) AWS unit will also be Anthropic's official cloud

provider.

Anthropic also said it is working with AWS' Annapurna Labs

on the development of future generations of Amazon's ( AMZN ) Trainium

chips and plans to train its foundational models on the

hardware.