Apple Sues OpenAI Over Alleged Trade Secret Theft

Apple has filed a lawsuit against OpenAI alleging trade secret theft and breach of contract, marking one of the most explosive legal confrontations yet between two of the most powerful forces in the technology industry. The Apple sues OpenAI trade secret case was filed on July 10, 2026, in the U.S. District Court for the Northern District of California, according to reporting by TechCrunch.

Apple alleges that the misconduct was not the work of rogue individuals, but was instead directed by OpenAI’s senior leadership — most prominently by Tang Tan, the company’s Chief Hardware Officer and a long-time former Apple executive. The lawsuit claims OpenAI orchestrated a deliberate strategy to extract Apple’s most sensitive confidential information through its own recruiting process.

Who Is Tang Tan?

Tang Tan spent 24 years at Apple before joining OpenAI, where he most recently served as Vice President of product design for the iPhone and Apple Watch. He now holds the role of Chief Hardware Officer at OpenAI — a position that places him at the center of the AI company’s reported effort to build its first consumer hardware device.

Apple’s lawsuit makes serious accusations against Tan. According to the complaint, he used Apple’s confidential project code names during OpenAI’s recruiting process, asked job candidates to bring Apple hardware components to their interviews, coached departing Apple employees on how to evade the company’s security procedures, and solicited details about unannounced Apple products.

These are not incidental claims. Apple is arguing that Tan’s conduct represents a pattern of theft that reached into the highest levels of OpenAI’s organization.

A Second Employee Named in the Complaint

Tan is not the only OpenAI employee referenced in the filing. Apple also names Chang Liu, who spent eight years at Apple as a senior systems electrical engineer before leaving for OpenAI in 2026. Apple alleges that Liu failed to return an Apple-issued laptop after his departure and used that computer to download confidential Apple technical documents.

Liu is further accused of sharing Apple’s confidential information with other Apple employees who were applying for jobs at OpenAI, and of advising at least one of them on what to study before their interview — effectively coaching future colleagues on how to extract and transfer Apple’s proprietary knowledge on their way out.

What Apple Claims Was Stolen

The lawsuit states that the stolen documents included information about unannounced technologies, features, and products, including technical specifications, engineering presentations, and proprietary project data. Apple says its ongoing investigation also revealed that OpenAI and its partners used Apple’s confidential information in the development of OpenAI’s own hardware product.

One specific example cited in the filing involves a proprietary metal finishing technique that was allegedly used by OpenAI after it misled a manufacturing partner into believing it had Apple’s permission to do so.

Apple sent a letter to OpenAI in February 2026 to raise its concerns. OpenAI did not respond, according to the complaint.

Why OpenAI Is Building Hardware

The timing of this lawsuit is not incidental. OpenAI is widely believed to be developing its first consumer hardware product — potentially a smartphone that would rely on AI agents instead of traditional apps. In April 2026, prominent Apple analyst Ming-Chi Kuo suggested the device could be a smartphone that would compete directly with the iPhone.

OpenAI’s hardware ambitions received a massive boost in 2025 when it acquired io, the device startup founded by Apple’s legendary former designer Jony Ive, in a $6.5 billion deal. While io was named in Apple’s legal filing, Ive himself was not.

For Apple, the prospect of OpenAI entering the smartphone market is already a serious strategic threat. If that hardware is being built on misappropriated Apple trade secrets, the company clearly views it as an existential provocation.

What Apple Is Asking the Court to Do

Apple is requesting several forms of relief from the court. It wants a court order barring OpenAI from using or disclosing Apple’s trade secrets, a requirement that OpenAI return any confidential Apple materials, and an order to preserve all evidence related to the alleged operation.

Apple’s filing also signals that the company expects to learn more through the legal discovery process. By taking the case to court, Apple gains access to OpenAI’s internal communications and documents in a way it could not otherwise compel.

“This is the tip of the iceberg,” the filing states. “Apple lacks visibility into what’s been happening behind closed doors at OpenAI, where such misconduct is normalized and exemplified by leadership. As a natural result, OpenAI’s nascent hardware business now rests on the shakiest of foundations, rotten to its core by its illegal reliance on misappropriated trade secrets.”

OpenAI Has Not Responded

As of the time of reporting, OpenAI had not issued a public comment on the lawsuit. The case remains developing, and the full scope of what Apple’s investigation has uncovered — and what the discovery process may reveal — is not yet known.

What is clear is that the Apple-OpenAI relationship, which had been publicly framed as a partnership when OpenAI’s ChatGPT was integrated into Apple Intelligence in 2024, is now in an entirely different posture. The companies are headed into what could be a lengthy and very public legal battle at the precise moment OpenAI is trying to establish itself as a hardware player.

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