Two partners who ended up in court
In 2024, Apple and OpenAI were allies: ChatGPT was integrated into Siri and Apple Intelligence, and OpenAI's chief appeared on stage at Apple's big event. By June 2026, the partnership had frayed — Apple announced its rebuilt Siri would run on Google's Gemini instead. On July 10, Apple filed a federal lawsuit in California accusing OpenAI of trade secret misappropriation and breach of contract, naming OpenAI, its hardware arm io Products, and two former Apple employees as defendants.
Apple's claims are serious: one former employee allegedly kept a company laptop and downloaded confidential files after leaving; another allegedly used Apple's internal project names in job interviews and even asked candidates to bring actual Apple parts. OpenAI denies everything, calling the lawsuit "careless, aggressive and oddly personal."
Two people in the middle
At the heart of the case are two names most people have never heard of. Tang Tan spent 24 years at Apple, helping design the iPhone, the Apple Watch and the iPod, before leaving in 2024 to build a hardware startup with Apple's legendary designer Jony Ive. OpenAI bought that startup — io Products — for around $6.5 billion, and Tan became OpenAI's chief hardware officer.
Chang Liu spent eight years at Apple as a senior electrical engineer before moving to OpenAI in January 2026. The lawsuit says he kept a work laptop, accessed a former colleague's computer and downloaded dozens of confidential files. OpenAI's response is a glimpse into how messy leaving a job can be: it published iMessages showing that Apple's own employees contacted Liu after his last day to ask for help locating files, restarting an airdrop and even keeping his iCloud signed in.
Imagine quitting a job and having old colleagues text you for the shared folder password — then having your new employer sued over it. That, in essence, is the human knot at the centre of this case. Apple itself says roughly 400 former employees now work at OpenAI; a CNN count of LinkedIn profiles found at least ten engineers who moved directly from one company to the other.
A letter, a wrong email, and five months of silence
One detail in OpenAI's rebuttal deserves attention. Apple claimed it contacted OpenAI in February and never heard back. OpenAI says what actually happened is almost farcical: Apple's outside lawyer emailed the wrong person — after mixing up two Asian surnames — and even claimed to have spoken with OpenAI's general counsel on the phone, a conversation OpenAI says never took place. Apple reportedly conceded the mistake, told OpenAI it was "resolving any issues," and then went silent for five months before filing the lawsuit.
OpenAI published the emails and chat logs — with names and Apple-internal details redacted — and says it does not have, nor want, any of Apple's trade secrets. Whether that convinces a judge is another question, but the episode shows how much of the fight is about perception, not just evidence.
The AI industry sues as much as it ships
The Apple case is not an exception. It is the pattern. OpenAI alone is fighting a remarkable web of legal battles:
Elon Musk took OpenAI and Sam Altman to trial in April 2026 over the company's shift from nonprofit to for-profit, seeking up to $134 billion — a case a jury rejected in less than two hours. Musk's own AI company, xAI, admitted in court that its Grok models were trained on OpenAI output. Microsoft, OpenAI's biggest backer, reportedly threatened legal action over OpenAI's $50 billion cloud deal with Amazon, and the pair rewrote their partnership days before the Musk trial began. A small startup called iyO Inc. is suing Ive, Altman and Tan over trademarks and trade secrets. And OpenAI has fought copyright battles from The New York Times' landmark suit in 2023 to a recent Delhi High Court ruling in India that went its way.
Lawyers, it seems, have become as important to AI strategy as engineers. That is not an accident: with talent scarce and money enormous, intellectual property is the battleground — and every company wants to protect its crown jewels while picking apart its rivals'.
Why this matters beyond the courtroom
For ordinary users, the immediate answer is: nothing changes today. Apple says the ChatGPT partnership agreement is not part of this lawsuit, so your iPhone keeps its ChatGPT integration for now. But the wider fight is real. OpenAI is preparing its first hardware device — reportedly a camera-equipped smart speaker — with an unveiling expected later this year, and it has confidentially filed for an IPO, reportedly targeting a listing this autumn. A court order against OpenAI, or a forced redesign of any affected products, could delay both.
For European readers, there is a quieter but similar dynamic closer to home: engineers and researchers move between AI companies on both sides of the Atlantic, and talent wars push salaries up everywhere. The lesson of the Apple-OpenAI feud is simple — in the AI industry, today's partner can be tomorrow's plaintiff. Keep an eye on the injunction ruling and the IPO timeline: they will tell you more about the state of AI than any model launch.
Will my iPhone lose ChatGPT because of the lawsuit?
Not because of this case. Apple explicitly says the ChatGPT partnership agreement is not part of the lawsuit. But the relationship has cooled: Apple announced its rebuilt Siri will use Google's Gemini, so ChatGPT's role in Apple's ecosystem is changing anyway.
Can Apple force OpenAI to change its products?
Apple is asking the court to bar OpenAI from using the disputed trade secrets and to order their return, and it has requested a preliminary injunction. Some reporting suggests Apple also wants OpenAI to redesign any products built on the contested technology — which could delay OpenAI's first hardware device.
Why are AI companies suddenly suing each other so much?
Because the stakes are enormous — scarce talent, billions in funding and intellectual property that is hard to protect. Lawsuits over trade secrets, copyright and contracts have become a standard competitive tool: OpenAI alone faces cases from Apple, Elon Musk, a hardware startup called iyO, and various copyright holders, while Microsoft and OpenAI have had their own legal tensions over cloud deals.
