Google and Apple are heading into a fresh clash with European regulators as the battle over AI assistants shifts to smartphones. The core concern is the companies' control over billions of devices worldwide, a position the European Commission views as a major advantage in the race to define how AI tools will reach users.

That advantage could be especially important as AI assistants become more deeply woven into everyday digital tasks. On phones, assistants can influence how people search, communicate, manage schedules and interact with apps, making control of the mobile ecosystem a powerful lever in the next phase of AI competition.

The dispute points to a broader question facing the tech industry: whether the future of AI will be shaped mainly by the quality of the assistant itself or by who controls the platforms where people use it. Because Google and Apple already operate the dominant smartphone environments, regulators appear concerned that rival AI services could face barriers in reaching users on equal terms.

For the EU, the issue goes beyond new product features and touches on competition in a market that may become central to digital life. The standoff underscores how regulation, platform power and artificial intelligence are increasingly colliding as policymakers try to prevent existing mobile dominance from carrying over into the AI era.