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 front-runner 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 Amazon would invest up to $4 billion. Wednesday’s news marks Amazon’s second tranche of that funding. News of the Amazon investment comes weeks after Anthropic debuted Claude 3, its newest suite of AI models that it says are its fastest and most powerful yet. Amazon’s move is the latest in a spending blitz among cloud providers to stay ahead in the AI race. And it’s the second update in a week to Anthropic’s capital structure.