Apple vs. OpenAI Trade-Secret Battle Escalates

Technology & Law

U.S. District Court, Northern District of California  |  Case No. 5:26-CV-07078-EJD  |  Updated September 1–2, 2026

Apple's trade-secret lawsuit against OpenAI has moved well past its original allegations, turning into a bitter, filing-by-filing courtroom brawl between two of the tech industry's most guarded companies. What started in July as an accusation that two former Apple engineers carried confidential hardware knowledge to their new employer has, over the past several weeks, expanded into claims of deleted messages, a leaked circuit schematic, dueling accusations of lax internal security, and — as of this week — Apple's explosive allegation that OpenAI is actively destroying evidence.

How it started

Apple sued OpenAI and its hardware unit, io Products, on July 10, 2026, in the U.S. District Court for the Northern District of California, alleging that OpenAI orchestrated a scheme to obtain confidential hardware information from former Apple employees in order to develop its own consumer devices. The 41-page complaint named two former Apple staffers now at OpenAI — Chang Liu and Tang Yew Tan — and accused the AI company of a coordinated, top-down effort to extract Apple's intellectual property.

"This much is clear, however: at every level, from members of its Technical Staff to its Chief Hardware Officer, and in coordination with business partners, OpenAI has been stealing Apple's trade secrets and confidential information," Apple said in its original complaint.

Among the complaint's more striking claims: that OpenAI coached departing Apple employees on how to avoid the "dreaded walkout" — Apple's practice of immediately removing departing staff from the building rather than letting them work out a standard two-week notice, which would otherwise limit their access to confidential systems. Apple also alleged that Chang Liu had taken an Apple-issued laptop with him when he left the company. Apple's filing warned that "discovery will expose that the misappropriation has been occurring on a scale many times greater than the several instances described," suggesting the named allegations were only "the tip of the iceberg."

OpenAI responded at the time with a brief statement rejecting the claims outright: "We have no interest in other companies' trade secrets. We remain focused on building innovative technology that empowers people everywhere."

OpenAI moves to dismiss — and turns the security argument back on Apple

On August 6, OpenAI formally asked the court to dismiss Apple's lawsuit, arguing in a 31-page motion that the case was "meritless" and amounted to Apple using litigation to compensate for its own struggles retaining talent and competing in AI. OpenAI's filing didn't mince words, accusing Apple of pursuing "a baseless and pretextual lawsuit to make up for its shortcomings in the market for talent and retaining its employees, and its failures to integrate AI into its products" — with variations of the word "fail" appearing nearly 50 times across the filing.

Crucially, OpenAI's legal strategy also flipped Apple's security argument back on the company itself. Newly filed exhibits showed OpenAI arguing that Apple's own security and offboarding practices — including allegedly allowing a manager to access a former engineer's iCloud account after he'd already left the company, and permitting employees to use personal iCloud accounts for work — undermined Apple's claim that the disputed information was ever properly protected as a legal trade secret in the first place. OpenAI also argued that Apple's complaint relied on vague, catch-all categories — "component manufacturing, product testing, vendor and supplier relationships, and distribution channels" — rather than identifying any specific stolen trade secret, a distinction that could prove decisive in whether the case survives the motion to dismiss.

Apple seeks an injunction; OpenAI fires back

With its case not yet dismissed, Apple escalated further by asking the court for a preliminary injunction — a request to bar OpenAI, along with Liu and Tan, from accessing, using or disclosing any Apple confidential information or trade secrets while the underlying lawsuit proceeds. Apple's motion cited new forensic evidence, including claims that Liu had used a confidential Apple circuit schematic and an internally named Apple engineering tool while working at OpenAI, and had allegedly enlisted a colleague, Yu-Ting Peng, in the effort.

OpenAI, in its September 1 opposition filing, called the dispute "a mess of Apple's own making," arguing that California law allows employees to move freely between competing companies and that Apple's suit was, in substance, an attempt to slow a rival and discourage further employee departures — noting that OpenAI has hired roughly 400 former Apple employees across its hardware projects.

OpenAI also published its own public rebuttal the same day, framing Apple's shifting allegations as a pattern: "Instead, they're trying to change their narrative, including by making vague accusations about other former employees, and will likely keep repeating this tactic," the company wrote, adding that Apple's injunction request was "both based on false information and completely unnecessary because we do not have, nor want, any of their trade secrets."

Apple's evidence-destruction bombshell

The dispute took its sharpest turn yet this week when Apple accused OpenAI of actively destroying evidence relevant to the case. According to Apple's latest court filing, OpenAI had "only recently" turned over a key piece of evidence — the Apple-issued MacBook that Chang Liu had continued using after leaving the company. Apple's forensic analysis of that laptop, the filing claims, found that Liu and others at OpenAI "were well aware" of his continued unauthorized access to Apple's third-party cloud storage providers. More seriously, Apple alleges the laptop contains evidence that Liu "sent instructions for destroying evidence to an OpenAI colleague who confirmed she would comply."

As of September 1, OpenAI maintained its position that Apple still had not demonstrated that any actual confidential information had been stolen — only that suspicious circumstances existed around the departures. OpenAI has separately described Apple's approach as a "witch hunt" and continues to argue the preliminary injunction request should be denied outright.

Case timeline at a glance

Date	Development
July 10, 2026	Apple files lawsuit against OpenAI and io Products
July 13, 2026	Detailed allegations revealed, including "dreaded walkout" coaching claims
August 6, 2026	OpenAI files motion to dismiss, calling the suit "meritless"
Late August 2026	Apple seeks expedited discovery, citing possible additional witnesses
~Aug 31, 2026	Apple files motion for preliminary injunction
September 1, 2026	OpenAI opposes injunction; Apple alleges evidence destruction
Presiding judge	Edward J. Davila, N.D. Cal.

Why this case matters beyond a personnel dispute

The stakes go well beyond two departed engineers. Apple and OpenAI were, until recently, close partners — the companies began working together in June 2024 to integrate ChatGPT into the iPhone, iPad and Mac, a partnership Apple has not commented on in relation to the lawsuit. OpenAI's ambitions in hardware have grown significantly since then, underscored by its 2025 acquisition of io Products, the design studio co-founded by former Apple design chief Jony Ive, for a reported $6.5 billion — a deal signaling OpenAI's clear intent to build its own consumer AI devices rather than remain purely a software layer riding on other companies' hardware.

Should the case proceed to full discovery, both companies could be forced to expose unusually sensitive internal details: how they recruit and retain talent, how they develop unreleased hardware, and how effectively — or ineffectively — they protect confidential information internally. For an industry already engaged in an intense, high-stakes war for AI talent, the outcome could set an important precedent for how far companies can go in hiring away rivals' engineers without crossing into trade-secret misappropriation.

Sources

• Axios — "Apple, OpenAI lawsuit timeline: How the legal fight keeps escalating"
• MacRumors — "Dispute With OpenAI Said to Be a 'Mess of Apple's Own Making'"
• Claims Journal / Bloomberg — "Apple Accuses OpenAI of Destroying Evidence in Exchange of Barbs"
• Cryptonomist — "Apple OpenAI Trade Dispute Escalates with New Evidence"
• OpenAI — "Apple is getting this wrong" (official statement)
• TechCrunch — "OpenAI says Apple's own security practices undermine its trade secrets case"
• Axios — "OpenAI moves to dismiss Apple's trade secret lawsuit"
• CNBC — "Apple sues OpenAI alleging trade secret theft, says scheme was 'at every level'"
• TechCrunch — "The wildest allegations in Apple's trade secrets lawsuit against OpenAI"

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