Amazon (NASDAQ:AMZN) just delivered one of its strongest years yetand it's not just about the numbers. Revenue jumped 11% to $638 billion, and operating income soared 86% to $68.6 billion. AWS, Amazon's crown jewel, pulled in $108 billion, up 19% year-over-year. But beneath those headline figures lies a deeper story: Amazon's big AI pivot is now front and center, and it's beginning to reshape everythinghow customers shop, how developers build, and how fast the company can move. Management isn't pulling any punches hereover 1,000 GenAI use cases are already being built across the company.

• Warning! GuruFocus has detected 2 Warning Sign with AMZN.

CEO Andy Jassy made one thing crystal clear: Amazon's all-in on AI. Whether it's training frontier models with its custom Trainium2 chips, expanding Bedrock and SageMaker, or reinventing Alexa into a true personal assistant, this isn't an experimentit's a full-scale reinvention. AWS is seeing triple-digit growth in AI revenue, and capital investments are ramping accordingly. Jassy believes this AI wave mirrors the early days of cloudand he's betting it'll be just as transformative for Amazon's long-term cash flow and returns.

But what really sets Amazon apart is its operating culture. The company keeps asking one questionWhy not?and it's this mindset that led to record-breaking same-day Prime deliveries, deeper rural reach, and a major push into healthcare via Amazon Pharmacy and One Medical. While other giants slow down, Amazon still moves like a startuplean, scrappy, and mission-obsessed. For long-term investors, the takeaway is clear: Amazon isn't just playing defenseit's building the infrastructure for what comes next.