Apple just torched its relationship with OpenAI in the most public way possible. On Friday, the iPhone maker filed a federal lawsuit in the Northern District of California accusing OpenAI and two of its own former employees of running a coordinated scheme to steal Apple’s trade secrets. And based on what’s in the filing, “coordinated” might be an understatement.

This isn’t a vague corporate spat over ideas. Apple’s complaint lays out something closer to a playbook. It’s rare to see one massive tech company accuse another of instructing job candidates to smuggle “actual parts” out of the building for interviews. But that’s exactly what’s alleged here, and it’s why this Apple OpenAI story is dominating tech news today.

Who’s actually named in the lawsuit

The suit names OpenAI directly, along with IO Products, the hardware startup that OpenAI acquired last year for 6.5 billion dollars. Two individuals are also named as defendants: Tang Tan, OpenAI’s chief hardware officer and a former Apple vice president who worked on the iPhone and Apple Watch, and Chang Liu, a former senior systems electrical engineer who spent eight years at Apple before joining OpenAI in January 2026.

Notably absent from the list of defendants is Jony Ive, Apple’s former design chief, whose startup, IO, was folded into OpenAI. The filing describes IO as complicit in what it calls “a coordinated pattern of misconduct at an institutional level,” but it stops short of naming Ive personally or accusing him of wrongdoing. Sam Altman is referenced in the complaint too, but he isn’t named as a defendant either. I think that distinction matters a lot here. Apple seems to be going after the mechanics of the alleged theft rather than making this personal against OpenAI’s most famous faces.

What Apple says actually happened

According to the filing, Chang Liu didn’t just leave Apple quietly. Apple alleges he accessed and downloaded dozens of confidential hardware-related files before departing, including detailed information on unreleased products, engineering presentations, technical specifications, and proprietary project data. He also allegedly failed to return his Apple-issued laptop and gained access to a former colleague’s work computer after he’d already left the company.

Tang Tan’s alleged role is where things get genuinely strange. Apple claims Tan directed current Apple employees who were interviewing at OpenAI to bring physical Apple components, things like batteries, logic boards, and SIPs, into interviews for what the filing calls “show and tell” sessions. The idea, according to Apple, was that Tan and his team could extract even more proprietary information by having candidates walk through unreleased hardware in person.

What most articles missed in the early coverage is the offboarding angle. Apple alleges Tan improperly retained or obtained an internal Apple document marked “Need to Know” that outlined security procedures for departing employees and then used it to coach new OpenAI hires on how to leave Apple without raising red flags. The filing even claims Tan told recruits not to disclose their new jobs at OpenAI so they could stay embedded at Apple longer, presumably to keep gathering information.

The metal finishing detail nobody’s talking about enough

Here’s the part of the story that I think deserves way more attention than it’s gotten. Apple’s complaint references a proprietary metal finishing technique that OpenAI allegedly used on its hardware after misleading one of Apple’s own manufacturing partners into believing OpenAI had permission to use it. That’s not just a rogue employee grabbing files on the way out. If true, that’s OpenAI’s hardware supply chain allegedly built in part on Apple’s own manufacturing know-how, obtained through deception.

Honestly, this is the detail that convinced me this lawsuit is bigger than a talent poaching dispute dressed up in legal language. Apple’s language backs that up too. The filing states plainly that OpenAI’s hardware business “now rests on the shakiest of foundations, rotten to its core by its illegal reliance on misappropriated trade secrets.” That’s not standard legal boilerplate. That’s Apple trying to undermine the legitimacy of OpenAI’s entire hardware project before it’s even launched.

A partnership that was already falling apart

The lawsuit lands with extra weight because Apple and OpenAI aren’t strangers. The two companies struck a high-profile partnership in 2024 that brought ChatGPT integration into iOS through Apple Intelligence. Sam Altman even showed up at Apple’s headquarters for the announcement. Fast forward to now, and Apple’s upcoming revamped Siri is reportedly leaning on Google’s Gemini models instead of OpenAI’s technology for at least part of its function.

I’ve been following the Apple and OpenAI relationship for a while, and honestly, the cracks have been visible for months. Sources suggest OpenAI had been quietly preparing to sue Apple first, reportedly weighing a breach of contract claim over how the ChatGPT integration was handled. According to reports, OpenAI’s chief global affairs officer said at Davos back in January that a new hardware device was coming sometime in the first half of 2026, so the pressure to ship something was already building internally.

Apple, for its part, says it tried to handle this quietly. The company claims it reached out to OpenAI back in February after first learning of potential theft and that OpenAI simply never responded. That silence, according to Apple, is part of why this ended up in federal court instead of getting resolved privately.

The scale of the talent exodus

One number in the filing stands out more than almost anything else. Apple says more than 400 former employees are now working at OpenAI. That’s a staggering figure, and it frames this lawsuit as something much larger than two rogue engineers. Apple isn’t suing over the hiring itself. People are allowed to leave for competitors. What Apple is arguing is that a subset of that migration involved employees actively taking confidential material with them, allegedly with encouragement from OpenAI’s own leadership.

When I first heard about this lawsuit, I assumed it would be another routine noncompete dispute that fizzles out in mediation. After digging into the actual filing, I changed my mind completely. The specificity here, physical parts in interviews, a retained internal security document, and a supplier being misled about permissions, reads like Apple built this case over months rather than rushing to court on a whim.

What Apple wants and what happens next

Apple isn’t just asking for money, though damages are part of the request. The company wants a court order barring OpenAI from using or disclosing any of its trade secrets going forward, a requirement that OpenAI return all confidential Apple material, and a preservation order to lock down evidence before it can disappear. Apple is also suing Tan and Liu individually for breach of contract, arguing they violated agreements they signed while employed at Apple.

If the current trajectory holds, this case is going to move into discovery, and that’s genuinely the part worth watching. Discovery could force OpenAI to hand over internal communications and hardware development records that would otherwise never see daylight. For a company gearing up for what’s expected to be a historic IPO, having a court dig through your hardware division’s origins is about the last thing you’d want on the docket.

OpenAI’s response so far has been brief. A company representative said OpenAI has “no interest in other companies’ trade secrets” and remains focused on building its own technology. That’s a fairly standard denial for a case this early, and it’s likely we’ll hear a lot more once OpenAI files its formal response.

What happens to the Apple Intelligence partnership is still an open question. Apple hasn’t said whether this lawsuit changes anything about the ChatGPT integration that’s still live on iPhones today. For now, the two companies remain business partners in public while accusing each other of bad faith in federal court, which is a genuinely wild place for two of the most recognizable names in tech to land.

The Apple lawsuit against OpenAI is still in its earliest stages, but the specifics already on the record, the physical parts, the retained security documents, and the alleged supplier deception make this one of the more serious trade secret cases the tech industry has seen in years.