I admit I don't see the issue here. Companies are free to select their service providers, and free to dominate a market (as long as they don't abuse such dominant position).
It also lends credence to the DOJ's allegation that Apple is insulated from competition - the result of failing to produce their own winning AI service is an exclusive deal to use Google while all competing services are disadvantaged, which is probably not the outcome a healthy and competitive playing field would produce.
This feels a little squishy... At what size of each company does this stop being an antitrust issue? It always just feels like a vibe check, people cite market cap or marketshare numbers but there's no hard criteria (at least that I've seen) that actually defines it (legally, not just someones opinion).
The result of that is that it's sort of just up to whoever happens to be in charge of the governing body overseeing the case, and that's just a bad system for anyone (or any company) to be subjected to. It's bad when actual monopolistic abuse is happening and the governing body decides to let it slide, and it's bad when the governing body has a vendetta or directive to just hinder certain companies/industries regardless of actual monopolistic abuse.
No they were already being sued for antitrust violations, it just mirrors what they are accused of doing to exploit their platform.
https://storage.courtlistener.com/recap/gov.uscourts.njd.544...
The problem isn't that they used another company's model. It's that they are using a model made by the only company competing with them in the market of mobile OS.
Sorry if I'm missing the point but if Apple had picked OpenAI, couldn't you have made the same comment? "nobody else can be the default voice assistant or power Siri, so where does this leave eg Gemini/Claude?".
However I don't see the link, how they are "using their duopoly", and why "they" would be using it but only one of them benefits from it. Being a duopoly, or even a monopoly, is not against anti-trust law by itself.