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OpenAI’s Sora feature was temporarily blocked from using the name “Cameo” after Cameo, the celebrity-video marketplace operated by Baron App, sued in October 2025. The Northern District of California found at the temporary-relief stage that Cameo was likely to succeed on its trademark-infringement claim and likely to suffer irreparable harm. OpenAI subsequently used the name “Characters,” and OpenAI says Sora itself became unavailable on April 26, 2026.
Why Cameo sued OpenAI
Cameo’s business connects fans with celebrities who record personalized videos after receiving a customer’s instructions. OpenAI’s updated Sora application, announced on September 30, 2025, let users create virtual likenesses and allow other users to place those likenesses in generated videos.
Cameo alleged that calling this Sora functionality “Cameo” could make consumers believe the feature was sponsored by, endorsed by, or affiliated with Cameo. Those points were allegations in the complaint, not findings that every allegation had been proved.
The court focused on the practical overlap. Its November order said the services were “similar in use and function” at least in part, including the possibility of producing a personalized celebrity greeting such as a birthday message.
Key dates in the dispute
| Date | Event |
|---|---|
| September 30, 2025 | OpenAI announced the updated, initially invite-only Sora application and its virtual-likeness functionality. |
| October 10, 2025 | Cameo sent OpenAI a cease-and-desist letter requesting a name change. |
| October 22, 2025 | OpenAI told Cameo it would not rename the feature, according to the court’s order. |
| October 28, 2025 | Cameo filed its complaint in federal court. |
| November 21, 2025 | Judge Eumi K. Lee granted temporary relief against use of the disputed name. |
| December 22, 2025, at 5 p.m. | The stated expiration time for the temporary restraining order while the court considered preliminary-injunction relief. |
| After November 21, 2025 | OpenAI renamed the feature “Characters.” OpenAI later described it as “Sora Characters (formerly known as the cameo feature).” |
| February 17, 2026 | TechCrunch reported that a later court ruling barred OpenAI from using “Cameo” in products and features. |
| April 26, 2026 | OpenAI’s Sora pages state that the Sora product is no longer available. |
What Judge Lee actually decided
The November 21 order was a temporary-relief ruling, not a final judgment on every claim. To obtain that relief, Cameo had to show, among other factors, a likelihood of success on its trademark claim and a likelihood of irreparable harm without an order. The judge found those showings satisfied at that stage and concluded that the balance of hardships and public interest favored relief.
#1 Best Overall
Judge Lee wrote: “The Court finds that Plaintiff is likely to succeed in establishing that Defendants’ ‘cameo’ feature on the Sora app is ‘similar in use and function,’ at least in part, to Plaintiff’s Cameo service.”
The order covered “Cameo” and marks the court considered confusingly similar, giving examples such as “Cameos,” “CameoVideo,” and “Kameo.” It barred their use as names for Sora products, services, features, or functionality and in related marketing and distribution in U.S. commerce. The order’s stated expiration date applied to that temporary restraining order while the next stage was considered.
Why the name mattered under trademark law
Similarity and relatedness
Trademark disputes do not turn only on whether two services perform exactly the same technical task. Courts also examine how consumers encounter the marks, whether the offerings serve overlapping purposes, and whether the names could suggest a common source. The order treated a personalized celebrity-style video as an area of meaningful overlap between Cameo’s marketplace and the Sora feature.
Consumer confusion
Cameo argued that users could infer sponsorship, endorsement, or affiliation. At the temporary-relief stage, the judge found the infringement claim likely to succeed; that finding did not establish that every statement in Cameo’s complaint was independently proven.
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“Cameo” as a descriptive word
TechCrunch reported that the later ruling rejected OpenAI’s argument that “Cameo” was merely descriptive, describing the court’s reasoning as treating the word as suggestive rather than a direct description of the feature. TechCrunch quoted Cameo CEO Steven Galanis calling the result a victory for the marketplace and creators. An OpenAI spokesperson was quoted saying the company disagreed that anyone could claim exclusive ownership of the word and would continue making its case. Those are reported party statements, not additional judicial findings.
Did OpenAI have to change the feature’s name?
Yes. After the November order, reporting said OpenAI changed the feature name to “Characters.” OpenAI’s own safety page uses “Sora Characters” and identifies it as formerly known as the cameo feature. The change addressed the branding at issue; it did not amount to a court ruling that AI likeness generation or all “cameos” in the ordinary-language sense were unlawful.
Is Sora still available?
OpenAI states that Sora is no longer available as of April 26, 2026. That product-availability notice does not, by itself, establish how the lawsuit ultimately ended. The reviewed February report does not establish the complete later docket history, including any final disposition or appeal.
Quick Recap
What this case does—and does not—mean
- The dispute centered on OpenAI’s use of the Cameo brand for a Sora feature and related U.S. marketing.
- The November 2025 order was temporary relief based on a likelihood-of-success assessment, not a final merits judgment covering every issue.
- The order did not prohibit all AI-generated likeness videos, personalized videos, or ordinary uses of the word “cameo.”
- OpenAI’s renamed “Characters” feature and Sora’s later shutdown are separate facts from the unresolved question of the lawsuit’s complete procedural outcome.
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