Amazon #AMZN is making its largest outside investment in its three-year history as it looks to gain an edge on the AI scene. The tech giant announced an initial $1.25 billion investment in September and at the time announced that Amazon would invest up to $4 billion. Wednesday’s news marks Amazon’s second tranche of funds ; it will retain a minority stake in the company and won’t have an Anthropic board seat, the company said. The deal was struck at the startup’s last valuation of $1