Google's AI Full-Stack Domination

Google (Alphabet) exceeded $400 billion in revenue for the first time in its history.

AI is the inflection point that made this happen.

Indeed, Alphabet’s Q4 2025 dashboard above is not six separate metrics. It is one interconnected machine where each piece feeds the others in a self-reinforcing loop that no competitor can replicate end to end.

What Google has quietly built over a decade is the only business model in tech that cuts through every layer of the AI stack simultaneously: from custom silicon at the bottom to consumer subscriptions at the top, with model infrastructure, advertising, content, and developer platforms filling every layer in between.

Here is how all the pieces come together.