The gloves are off between two of tech’s biggest names. OpenAI fired back hard at Apple this week in their escalating legal battle, telling a federal court in blunt terms that Apple has no one to blame but itself. The OpenAI Apple trade secret fight just took its sharpest turn yet, with OpenAI accusing the iPhone maker of using “sloppy procedures” to cover for its own failure to prove any actual wrongdoing.
OpenAI’s Response, in Its Own Words
In a filing submitted late Monday in U.S. District Court in San Jose, California, OpenAI didn’t hold back. “This dispute is a mess of Apple’s own making, and it is trying to blame everyone else,” the company wrote, directly denying that any confidential Apple information had been stolen by former employees. OpenAI’s core argument is straightforward: Apple simply failed to demonstrate that any actual trade secrets were misappropriated, and is instead using the lawsuit as a strategic weapon.
How This Legal Fight Started
Apple filed the original lawsuit in July, targeting OpenAI along with two former Apple employees, Tang Tan and Chang Liu, accusing them of misappropriating trade secrets tied to hardware design, manufacturing, and supply-chain operations as OpenAI pushes into building its own consumer devices. Apple’s complaint painted a picture of a coordinated effort to extract confidential information, alleging Liu had kept a company laptop after leaving and used an authentication bug to access Apple’s internal network, while Tan allegedly emailed himself supplier information and internal industry summaries before departing.
The Individual Defendants Push Back Too
Both named former employees offered their own detailed rebuttals in Monday’s filing. Liu said any access to Apple documents after his departure was simply to help former colleagues locate files or answer work-related questions, noting that Apple employees had repeatedly reached out to him for assistance even after he’d left the company. Tan, who spent 24 years at Apple, said he returned all Apple prototypes before departing and only retained non-confidential materials — including an employee departure checklist he says was never confidential in the first place.
OpenAI’s Bigger Argument: This Is About Competition, Not Theft
OpenAI, led by CEO Sam Altman, contends the real motivation behind Apple’s lawsuit is to slow down a fast-growing competitor and discourage more employees from leaving for OpenAI’s hardware division. Both companies have confirmed in court filings that OpenAI has hired roughly 400 former Apple employees for its hardware initiative. OpenAI’s filing leaned directly into California’s strong employee mobility protections, arguing the law allows workers to freely move between rival companies. In its own words, OpenAI wrote that employees “can leave a company like Apple that has struggled to adopt AI and move to an exciting startup that builds innovative products,” adding that Apple “may not like those choices” but cannot claim they’re unlawful.
A Notable Counter-Accusation: Apple’s Own Security Practices
In an interesting twist, OpenAI’s filing turned some scrutiny back onto Apple itself, claiming Apple actually encourages its employees to use personal iCloud accounts to access company work documents and perform their job functions — a practice OpenAI argues makes it genuinely difficult to draw a clean line around what counts as “confidential” once information passes through personal accounts. It’s a pointed argument: if true, it suggests any blurring of internal versus personal data may trace back to Apple’s own internal policies rather than any deliberate theft.
A Partnership That Soured Fast
The scale of this legal rupture is especially striking given how recently Apple and OpenAI were close partners. Just two years ago, the two companies forged a high-profile collaboration to integrate ChatGPT into Apple’s ecosystem, boosting ChatGPT’s reach while helping Apple strengthen its own AI capabilities. That relationship cooled rapidly as OpenAI expanded into hardware — a move that put it in more direct competition with the very company it had partnered with, ultimately setting the stage for July’s lawsuit and this week’s sharp rebuttal.
What Happens Next
With both sides now on record with starkly different accounts — Apple alleging a coordinated, methodical theft of trade secrets, and OpenAI calling the entire dispute a self-inflicted mess built on shaky internal procedures — the case heads toward further proceedings in California federal court. How the judge weighs Apple’s specific evidence against OpenAI’s broader “no actual theft, just employee mobility” defense will likely shape how much further this fight escalates.
Frequently Asked Questions
What is the OpenAI-Apple lawsuit about?
Apple sued OpenAI and two former Apple employees in July 2026, alleging they misappropriated trade secrets related to hardware design, manufacturing, and supply-chain operations to benefit OpenAI’s push into consumer hardware.
What did OpenAI say in response?
OpenAI denied the allegations in a court filing, stating Apple failed to show any confidential information was actually stolen and calling the dispute “a mess of Apple’s own making.”
Who are Tang Tan and Chang Liu?
They are two former Apple employees, now working at OpenAI, named as defendants in Apple’s lawsuit. Tan spent 24 years at Apple in product design, while Liu was a senior system electrical engineer.
How many former Apple employees now work at OpenAI?
Both companies have confirmed in court filings that OpenAI has hired roughly 400 former Apple employees as part of its hardware initiative.
With sharply conflicting accounts now on the court record, this trade secret battle looks far from over — and given how quickly this once-close partnership has unraveled, it’s likely to remain one of the more closely watched legal fights in tech for months to come.
