For years, one company has quietly powered the artificial-intelligence boom from the inside: Nvidia. According to a report from qz.com, republished by Yahoo Finance, Nvidia has owned the market for AI hardware — the specialized chips that train and run the models behind today's AI tools — and it has held that position for years.

Now that grip is being tested. The report says six tech giants are racing to build their own AI chips and break their dependence on Nvidia. Among them are Google and Amazon, two of the largest buyers of AI hardware in the world.

The key nuance, according to qz.com, is that these rivals are moving at "wildly different speeds." In other words, this is not a single coordinated assault but a scattered field of competitors, each at a different stage of catching up — some further along than others.

Why would giant customers want to design their own chips? The sources here don't spell out the motivations in detail, so the specifics are best read directly from the reporting. What the items do establish is the shape of the contest: an entrenched leader, and a group of well-resourced challengers determined to escape its grip.

Why it matters: Nvidia's dominance gives it enormous influence over the cost and supply of the AI industry's most essential ingredient, so any credible challenge from companies as large as Google and Amazon could reshape who controls the foundation of the AI economy.