Apple vs OpenAI: When Partnerships Turn Toxic

Apple sued OpenAI in California federal court on Friday, accusing the ChatGPT maker of systematically stealing hardware trade secrets [1]. The lawsuit names two former Apple employees, Tang Tan and Chang Liu, and describes what Apple calls "a pattern of theft" that was "normalised and exemplified by leadership" [2].

This is not a polite patent dispute. It is a trade secret theft case with criminal overtones, and it marks the definitive collapse of what was once Silicon Valley's most closely watched AI partnership.

The Allegations

Apple's complaint paints a picture of industrial espionage conducted in plain sight. Tang Tan, who spent 24 years at Apple as VP of product design for the iPhone and Apple Watch, allegedly emailed confidential supplier information to himself before departing for OpenAI, where he now serves as chief hardware officer [3].

The second named defendant, Chang Liu, is a former electrical engineer who worked on Apple's most sensitive product development programs. Apple claims Liu failed to return a work device, used another employee's computer to access trade secrets, and coached that employee on how to copy files while evading Apple's security team. According to the filing, Liu texted the employee: "LOL, I found out I can access the [network storage], so funny" [4].

Apple says Liu also instructed the employee to communicate over Line Messenger to avoid detection, and advised departing Apple staff to let OpenAI know if Apple personnel "ask you to sign anything" [5].

"Show and Tell" Sessions

Perhaps the most striking allegation is that OpenAI instructed Apple employees being recruited to bring "digital designs and prototypes" to interviews for what the lawsuit calls "show and tell sessions." Apple claims this was not casual, it was a systematic effort to acquire Apple's confidential work product during the hiring process [6].

Over 400 former Apple employees now work at OpenAI, according to the filing. That number alone is staggering. Apple says it reached out to OpenAI in February to raise concerns and ask what they were doing about it. OpenAI never responded [7].

Why Now?

OpenAI acquired Jony Ive's io hardware studio for $6.4 billion in May 2025, signaling a clear intent to build consumer hardware that would compete directly with the iPhone [8]. OpenAI's first hardware product is expected to arrive next year, described as a new way to interact with AI that goes beyond "traditional products and interfaces" [9].

Apple frames this as the motive: OpenAI needs new revenue lines quickly, and rather than building hardware expertise from scratch, it allegedly chose to appropriate it. In the lawsuit's words, OpenAI's "nascent hardware business now rests on the shakiest of foundations, rotten to its core by its illegal reliance on misappropriated trade secrets" [10].

The lawsuit also alleges that OpenAI has been targeting Apple's supply chain partners directly, having one Apple partner perform "Apple's proprietary, trade secret processes for OpenAI's benefit" [11].

The Bigger Picture

This lawsuit escalates a conflict that has been brewing for months. The Apple-OpenAI relationship started with the ChatGPT-Siri integration, a partnership that was supposed to bring OpenAI's models to hundreds of millions of iPhone users. That deal soured, and OpenAI reportedly began preparing its own legal action over the failed partnership [12].

Now the dispute has moved from commercial disagreement to allegations of trade secret theft. Apple is seeking an injunction to prevent evidence destruction, the return of all trade secrets, and damages. The case is filed in California federal court, which means discovery, depositions, and potentially a jury trial [13].

Meanwhile, OpenAI is already under investigation by 42 state attorneys general and facing scrutiny from investors over its $852 billion valuation as Anthropic has leapfrogged it in the frontier model race [14]. A trade secret theft lawsuit from Apple is the last thing OpenAI needs right now.

What to Watch

The complaint is 41 pages, which suggests Apple has a substantial factual record. Trade secret cases live or die on specificity, and Apple's filing appears to include specific dates, text messages, and named individuals. That is not a fishing expedition, it is a targeted strike.

The key question is whether OpenAI can contain this to the two named individuals or whether Apple can demonstrate that the theft was institutional. If Apple can show that OpenAI's leadership knew about and encouraged the theft, the consequences extend far beyond returning documents. That could mean an injunction against shipping products built with stolen information, which would be catastrophic for OpenAI's hardware ambitions.

OpenAI's response was brief: "We have no interest in other companies' trade secrets. We remain focused on building innovative technology that empowers people everywhere" [15]. That is a deflection, not a defense. We will see if it holds up in court.