Amazon is making its largest outside investment in its three-decade history as it looks to gain an edge in the artificial intelligence race. The tech giant said it will spend another $2.75 billion backing Anthropic, a San Francisco-based startup that's widely viewed as a frontrunner in generative artificial intelligence. Its foundation model and chatbot Claude competes with OpenAI and ChatGPT.The companies announced an initial $1.25 billion investment in September, and said at the time that Amaz...