Apple filed suit against OpenAI on 10 July 2026 in the US District Court for the Northern District of California, alleging a coordinated scheme to misappropriate hardware trade secrets through former Apple employees now working on OpenAI's forthcoming consumer device. The lawsuit lands the same week Apple confirmed that the redesigned Siri, due in autumn 2026, will run on Google's Gemini rather than ChatGPT — formally closing the 2024 ChatGPT-in-Siri partnership.
TL;DR
- Apple sued OpenAI, io Products, and two former Apple employees on 10 July 2026 for trade secret theft.
- Named individuals: Tang Tan, OpenAI's Chief Hardware Officer and 24-year Apple veteran, and Chang Liu, a former senior systems electrical engineer.
- Apple alleges over 400 ex-Apple staff now work at OpenAI, citing codenames, hardware samples, and internal documents.
- Jony Ive is not named as a defendant.
- Siri's autumn 2026 relaunch will use a custom 1.2 trillion parameter Gemini model, reportedly costing Apple around $1 billion a year.
- OpenAI filed a confidential S-1 on 8 June 2026, so the litigation sits inside its IPO disclosure window.
What exactly is the Apple OpenAI lawsuit about?
Apple's complaint describes what it calls a "coordinated scheme" at "every level" to move confidential hardware information from Apple to OpenAI to accelerate OpenAI's upcoming AI device. The company is asking the court to bar OpenAI from possessing, using or disclosing the alleged trade secrets, to order return of confidential materials, to preserve evidence, and to award damages. Coverage was reported by CNBC and Axios.
The named defendants are OpenAI, io Products, Tang Tan, and Chang Liu. Apple frames the wider context bluntly: more than 400 former Apple employees now work at OpenAI, and the complaint argues that hiring pattern was used to systematically pull hardware know-how across the boundary between the two companies. OpenAI has not issued a public response.
Who are Tang Tan and Chang Liu, and what are they accused of?
Tang Tan spent 24 years at Apple, including as Vice President of Product Design for iPhone and Apple Watch, before co-founding io Products with Jony Ive and later joining OpenAI as Chief Hardware Officer when OpenAI acquired io in 2025 for roughly $6.5 billion. Apple's complaint accuses him of using Apple project codenames during recruiting interviews to draw specifics out of current Apple engineers, of asking candidates to bring "actual parts" such as batteries, logic boards and system-in-package modules to those interviews, and of circulating an internal Apple "Need to Know" document on security procedures for departing staff. He is also alleged to have advised recruits not to tell Apple they were leaving.
Chang Liu, a former senior systems electrical engineer, is accused of failing to return his company laptop, skipping his exit interview, and exploiting a bug in Apple's internal cloud storage to access files after departure. He downloaded dozens of confidential documents, including more than 1,000 pages of technical materials and manufacturing details.
A separate allegation says OpenAI persuaded a supplier to demonstrate a trade-secret metal-finishing technique by falsely claiming Apple had given permission.
Why is Jony Ive not named as a defendant?
Jony Ive co-founded io Products with Tang Tan and sold the company to OpenAI, but Apple's complaint does not name him or accuse him of wrongdoing. Apple is pursuing the case on trade secret grounds — targeting the specific pattern of behaviour it says surrounded the build, not the broader concept of a former Apple designer building AI hardware.
Why is Siri moving from ChatGPT to Google Gemini?
Apple has confirmed that the rebuilt Siri, due in autumn 2026, will call out to Google's Gemini rather than OpenAI's ChatGPT. According to CNBC, the arrangement uses a custom 1.2 trillion parameter Gemini model, with reports putting the value at around $1 billion per year.
The context matters. Apple integrated ChatGPT into Siri in 2024 as its flagship consumer AI partnership, giving OpenAI default assistant positioning on roughly 1.5 billion iPhones. Two years on, Apple is both ending that arrangement and suing its former partner. The lawsuit and the Gemini deal point in the same direction: Apple no longer treats OpenAI as a safe upstream provider for a product embedded in its hardware roadmap — particularly while OpenAI prepares a competing camera-equipped smart speaker of its own.
For context on Apple's parallel hardware bets, see our piece on the Apple and Broadcom $30 billion Baltra AI chip deal. For a broader picture of how OpenAI has been evolving, see our note on the OpenAI leadership changes around Fidji Simo.
How does this affect OpenAI's IPO?
OpenAI filed a confidential S-1 with the SEC on 8 June 2026. Active litigation from a company Apple's size is material to that filing and will need to be disclosed as a risk factor before any public offering. The specifics depend on how the claims progress, whether the court grants preliminary relief, and whether Apple seeks an injunction restricting what the io Products team can build. None of that stops an IPO by itself, but it gives prospective investors a concrete legal exposure to price in.
What does this mean for AI partnerships going forward?
The practical lesson is narrow. When two companies compete in adjacent markets, deep AI integration deals carry structural IP risk that is not obvious at signing. In 2024, ChatGPT-in-Siri looked like a clean split of roles: Apple owned the device, OpenAI owned the model. By 2025, OpenAI had bought io Products and moved into consumer hardware, putting it directly across the table from its integration partner. The 2026 lawsuit is where that overlap turns into court filings. Teams designing similar partnerships should expect tighter contractual language around hiring, exit procedures, supplier access, and codename handling. For a working view of how ChatGPT still fits into daily tools despite shifting alliances, see our ChatGPT productivity guide, our GPT-5.6 build guide, and the note on Meta's Muse Spark agentic orchestration.
FAQ
Q: When and where was the Apple OpenAI lawsuit filed? A: Apple filed the case on 10 July 2026 in the US District Court for the Northern District of California. Defendants are OpenAI, io Products, Tang Tan, and Chang Liu.
Q: Who are the defendants in the Apple OpenAI lawsuit? A: OpenAI, io Products, Tang Tan (OpenAI's Chief Hardware Officer), and Chang Liu (former Apple engineer).
Q: Is Jony Ive being sued by Apple? A: No. Ive co-founded io Products but is not named as a defendant or accused of wrongdoing.
Q: Why is Siri switching from ChatGPT to Google Gemini? A: Apple has moved Siri to a custom 1.2 trillion parameter Gemini model for the autumn 2026 relaunch, reportedly under a deal worth about $1 billion a year, ending the 2024 ChatGPT-in-Siri arrangement.
Q: What is Apple asking the court to do? A: Apple is asking the court to stop OpenAI from possessing, using or disclosing the alleged trade secrets, to order return of confidential materials, to preserve evidence, and to award damages.
Q: Does the lawsuit affect OpenAI's planned IPO? A: OpenAI filed a confidential S-1 on 8 June 2026. The litigation will need to be disclosed as a risk factor in its public filings but does not by itself block an offering.
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