Apple Just Sued OpenAI. Here’s What’s Actually in the Complaint

Two tech giants that were supposed to be partners just became courtroom opponents.

On July 10, Apple walked into the U.S. District Court for the Northern District of California and filed a lawsuit against OpenAI. Not over ChatGPT. Not over how Siri uses OpenAI’s models. This one is about hardware — specifically, Apple’s claim that its own former employees handed OpenAI a shortcut into the consumer device business.

It’s a messier, more personal story than most corporate lawsuits, and the details in the filing are pretty striking once you actually read them.

The Two Names at the Center of It

Apple’s complaint names OpenAI, its hardware subsidiary io Products, and two individuals: Tang Tan and Chang Liu.

Tan spent 24 years at Apple, most recently as vice president of product design for the iPhone and Apple Watch, before leaving in 2024 to co-found io Products alongside former Apple design chief Jony Ive. OpenAI bought io for roughly $6.5 billion last year, and Tan now runs OpenAI’s hardware effort as Chief Hardware Officer.

Liu is a different kind of defendant — a senior systems electrical engineer who spent eight years at Apple before joining OpenAI in early 2026. Apple says he never returned his company laptop, later exploited a security flaw to get back into Apple’s internal network, and downloaded a batch of confidential hardware files.

What Apple Says Actually Happened

The complaint doesn’t read like a typical dry legal filing. Some of the specific allegations:

• Tan allegedly used Apple’s own internal project codenames while interviewing Apple employees for jobs at OpenAI, asking pointed questions about unreleased products.
• Job candidates who still worked at Apple were reportedly told to bring “actual parts” — components like batteries, logic boards, and chips — into their OpenAI interviews for what the filing calls “show and tell.”
• Apple claims Tan circulated an internal offboarding document to coach new OpenAI hires on how to slip past Apple’s exit security checks.
• Apple also alleges OpenAI approached its manufacturing partners directly, in one case getting a supplier to demonstrate a proprietary metal-finishing process under the impression Apple had signed off on it.

Apple says it first raised these concerns privately in February and never got a response, which is part of why it’s now in court.

The Legal Theory Behind the Case

Trade secret law isn’t just about stolen blueprints. Apple’s complaint reportedly organizes its claims into several distinct buckets, and one of them is unusual enough to be worth explaining: something lawyers call “negative know-how.”

Put simply, it’s not just about what Apple built — it’s about what Apple tried and rejected. Years of failed prototypes, abandoned manufacturing approaches, and dead-end engineering decisions are, in Apple’s view, just as valuable as the finished product, because they save a competitor from repeating the same expensive mistakes. Apple argues this kind of institutional knowledge can’t be recreated by simply reverse-engineering a shipped device, which is why it’s treating it as protected information rather than general industry experience an engineer is free to carry with them.

Apple’s filing also digs into supplier relationships, naming manufacturing partners like Foxconn, Luxshare, and Goertek in connection with its claims — suggesting the company believes the alleged leaks extended beyond internal documents and into how Apple actually gets products built at scale.

This Isn’t a One-Off Complaint

Apple’s filing points out that more than 400 former Apple employees currently work at OpenAI. That number alone doesn’t prove wrongdoing — people switch employers constantly in Silicon Valley — but Apple is framing it as evidence of a pattern rather than an isolated incident involving two people.

What Apple is asking the court for is also worth noting: not just damages, but a preliminary injunction that would force OpenAI to stop using any of the disputed information and preserve evidence going forward. If a judge grants that, it could genuinely slow down OpenAI’s hardware timeline — the company is widely rumored to be prepping its first AI device for release sometime in 2026.

OpenAI Isn’t Just Sitting Quietly, Either

Here’s a wrinkle that makes this story more interesting than a standard IP dispute: OpenAI has reportedly been building its own case against Apple, unrelated to hardware. Sources told Bloomberg earlier this year that OpenAI was considering legal action over how the ChatGPT-Siri integration deal played out. Apple’s complaint explicitly notes that this new lawsuit isn’t about that agreement — but the timing suggests two companies that were cooperating a year ago are now negotiating through lawyers instead of product teams.

Add in the fact that OpenAI just came off a high-profile courtroom win against Elon Musk two months ago — a jury sided with OpenAI on his claims about the company abandoning its nonprofit roots — and you get a sense of how legally exposed and legally aggressive OpenAI has become in the same year it’s reportedly gearing up for an IPO.

That IPO timing matters here. Companies preparing to go public generally want their legal exposure to look as clean as possible on paper. A trade secret suit from a company as large and litigious as Apple is exactly the kind of headline risk investors tend to ask hard questions about, regardless of how the case eventually gets resolved.

What Device Is Everyone Even Talking About?

OpenAI has never officially confirmed what it’s building, which makes this whole case a bit stranger than the average tech lawsuit — Apple is accusing OpenAI of stealing a roadmap to a product nobody outside the company has actually seen. Analyst Ming-Chi Kuo has reported that OpenAI is working on a dedicated smartphone, though he’s pointed to a launch closer to 2028 rather than anything imminent. Separately, other reports have described something closer to a HomePod-style smart speaker or a screenless companion device, reflecting Jony Ive’s long-standing interest in ambient, minimal hardware rather than another phone screen.

Whatever the actual product turns out to be, the fact that Apple felt the need to sue before it even ships tells you how seriously the company is treating the threat. This isn’t Apple reacting to a finished competitor on store shelves — it’s Apple trying to head off a competitor before its first product exists.

Why This Matters More Than a Typical Corporate Spat

Software companies suing each other over code or patents is old news. This case is different because it’s about physical products — manufacturing know-how, supplier relationships, and design details that took Apple decades to build.

That’s a meaningful signal. The AI industry’s next big fight isn’t only about which company has the smartest model. It’s increasingly about who can turn AI into a device people actually want to hold — and Apple clearly isn’t willing to let a rival get there by hiring away the people who know exactly how Apple does it.

What Happens From Here

Trade secret cases like this rarely move fast. Realistically, expect:

• Months of discovery before anything resembling a resolution
• A real possibility the case settles quietly before trial, which is common in disputes like this
• A ruling on Apple’s injunction request that could come much sooner and would be the first sign of how seriously the court is taking the claims

For most people scrolling past the headline, nothing changes overnight. But if you’re watching where AI hardware is headed — whether OpenAI’s rumored device ships on schedule, whether Jony Ive’s design team can operate without a legal cloud hanging over it — this lawsuit is now part of that story, whether or not Apple ultimately wins in court.