When OpenAI launched Sora 2 on September 30, 2025, it included a feature letting users insert themselves into AI-generated videos. OpenAI called it “Cameo.” The problem: a company called Cameo, with four federal trademark registrations and 40,000+ celebrities on its platform, already owned that name.
Cameo is a Chicago-based marketplace founded in 2017 where fans pay celebrities to record personalized video messages. It reached a $1 billion valuation in 2021, has raised $206.6 million in total funding, and takes a 25-30% commission on each transaction. When OpenAI launched its competing “Cameo” feature, the platform’s lawyers moved fast.
On October 22, 2025, Cameo sent OpenAI a cease and desist demand. OpenAI refused. Six days later, on October 28, 2025, Cameo filed suit in the U.S. District Court for the Northern District of California (Case No. 5:25-cv-09268-EKL). The complaint alleged trademark infringement under the Lanham Act, trademark dilution by blurring and tarnishment, and unfair competition under state law.
Judge Eumi K. Lee granted a Temporary Restraining Order on November 21, 2025, just 24 days after filing. The TRO was extended 45 days at a December 19, 2025 show cause hearing. In January 2026, OpenAI filed a motion to dismiss the dilution claim. It did not help. On February 14, 2026, Judge Lee granted a preliminary injunction. OpenAI renamed the feature to “Characters” shortly after.
The court found that OpenAI had adopted an identical mark for overlapping services, that consumers were actually confused, and that Cameo faced irreparable harm. The balance of hardships, the court noted, favored Cameo: renaming one feature costs OpenAI very little. Letting the infringement continue could cost Cameo its brand.
Why the Court Rejected OpenAI’s “Common Word” Defense
OpenAI’s defense rested on a simple argument: “cameo” is an ordinary dictionary word meaning a brief appearance. The company said no one can claim exclusive ownership over a term that common. It is a reasonable-sounding argument. Courts hear it often. They reject it often.
To understand why, you need the Abercrombie spectrum: the framework courts use to classify how distinctive a trademark is. At one end are generic terms, which can never be protected (you cannot trademark “apple” for apples). Moving up the scale are descriptive marks, suggestive marks, and at the top, arbitrary and fanciful marks.
Descriptive marks immediately convey what a product or service does. They require proof of secondary meaning (years of exclusive use building consumer recognition) before they receive trademark protection. Suggestive marks require imagination to connect the word to the service. They are inherently distinctive and receive immediate protection without proof of secondary meaning.
Judge Lee placed “Cameo” in the suggestive category. The word does not immediately describe what Cameo does. A consumer hearing “Cameo” for the first time does not instantly think “marketplace where celebrities record personalized videos.” That connection requires a mental step. That mental step is exactly what makes a mark suggestive rather than descriptive, and it is why Cameo’s registration from April 7, 2020 carried full legal weight without Cameo having to prove years of consumer recognition.
From there, the likelihood of confusion analysis was straightforward. The marks were identical. The services overlapped: both involved personalized video appearances. Consumers were actually confused, sending misdirected customer service inquiries to Cameo and conflating the two services on social media. The court also noted evidence of bad faith adoption, meaning OpenAI may have known about Cameo’s rights before launching.
This is not OpenAI’s first trademark defeat. In OpenAI’s separate trademark dispute over its IO product name, the Ninth Circuit upheld a TRO against OpenAI and the company ultimately abandoned the “IO” branding entirely. A pattern is forming. A motion to dismiss remains pending, with a hearing set for April 29, 2026, but the preliminary injunction is already in effect.
AI Companies Keep Choosing Names That Already Belong to Someone
The Cameo case is not an isolated incident. It fits a pattern that has emerged across the AI industry over the past two years: companies shipping features at high speed, picking names that sound good in a product meeting, and skipping the step where someone checks whether that name is already registered.
OpenAI has now been on the losing end of this twice. The IO dispute cost them an entire product name category. The Cameo dispute cost them a feature and likely a significant amount in legal fees. Renaming “Cameo” to “Characters” after a court order is not a soft landing. It is a forced rebrand under judicial pressure, which carries its own brand damage for a company trying to project competence.
OpenAI is not alone. Anthropic recently forced a developer to rebrand his AI project from Clawdbot to Moltbot because the name was phonetically similar to Claude, Anthropic’s flagship AI model. And Google has faced trademark litigation over “Flow,” its AI filmmaking tool, from Autodesk, which holds prior rights in that term for design software.
The underlying dynamic is the same in each case. AI product teams are under intense competitive pressure to launch. Features go from concept to public in weeks. Legal review that might catch a trademark conflict often happens after the name is already in the press, the marketing assets are live, and users are already calling the feature by its infringing name. By then, changing course feels expensive even when the litigation cost of not changing course is far higher.
There is also a structural reason AI features are especially prone to this problem. AI tools are increasingly consumer-facing, which means they operate in name space already crowded with consumer brands. A feature for inserting yourself into videos runs directly into entertainment and social media trademarks. A feature for AI music runs into music industry brands. Courts are not treating AI companies differently because of their industry. The same trademark rules apply. The only question is whether a company cleared the name before launching or is paying to clear it afterward in federal court.
Protecting Your Brand in the Age of AI Feature Launches
For brand owners, the Cameo case illustrates what proper trademark infrastructure makes possible. Cameo’s four federal registrations were the foundation of everything that followed. Registration No. 6026358, filed May 10, 2017 and registered April 7, 2020, gave Cameo a presumption of validity, nationwide priority, and standing to seek injunctive relief. Without those registrations, the case would have been harder, slower, and far less certain.
The timeline matters. Cameo built eight years of registered rights before OpenAI launched its competing feature. By September 2025, Cameo’s trademark was not just registered; it was entrenched. That history made the bad faith argument more credible: OpenAI launched into a space where Cameo had long-established, publicly registered rights.
Monitoring and speed of response compounded the registration advantage. Cameo caught the infringement within weeks of the Sora 2 launch and moved immediately. The TRO came 24 days after filing. Compare that to brand owners who discover infringement months or years later, after the infringing use has become entrenched and harder to challenge. If Cameo had waited months to act, OpenAI’s “Characters” rebrand might have happened voluntarily, on OpenAI’s timeline, with no court order requiring it and no injunction on the record. Fast response, backed by solid registrations, is what turned this into a clean win.
For companies launching new products and AI features, the lesson is cost comparison. A proper trademark clearance search identifies conflicts before they become lawsuits. My full registration service starts at $1,195 plus government filing fees of $250 to $350 per class, and it includes the clearance search as the first step. Federal trademark litigation, by contrast, runs well into six figures before a case reaches trial. Attorney fees, discovery costs, expert witnesses, and the management time consumed by a multi-month federal case add up fast. OpenAI’s legal costs from the Cameo dispute, which has already spanned five months of active litigation, almost certainly dwarf what a clearance search would have cost by a factor of a hundred or more. Conducting a professional trademark clearance search before committing to a name is not a luxury. It is the cheaper option by orders of magnitude.
What This Means for Your Brand
AI companies are launching features at unprecedented speed, and they are borrowing names from every corner of consumer culture. If your business has a recognizable brand name, the question is not whether an AI company will use something similar. It is whether you will have the trademark registrations in place to stop them when they do.
I help businesses build trademark protection before conflicts arise. From clearance searches to federal registration to monitoring, the goal is giving you the legal foundation to act fast when someone uses your name without permission. Cameo won because they had registrations, acted quickly, and had clear evidence of established rights. That kind of preparation starts years before any lawsuit gets filed.
If you are concerned about protecting your brand name or need to evaluate your current trademark portfolio, contact me for a consultation. The best time to secure your trademark rights is before someone else decides your name would make a good feature.
