SpaceXAI Arbitration Bid in AI Slowdown Lawsuit Runs Into Three Rulings Against Grok's Terms

SpaceXAI's arbitration bid in the AI slowdown lawsuit is now fully contested: on Oct. 27, 2026, the four subscribers suing Anthropic, OpenAI, SpaceXAI and Google under the Sherman Act told a federal court in the Northern District of California that SpaceXAI cannot split off, move to Texas, or push their claims into individual arbitration. Their central point is that Grok's sign-up screen, which supplies the only contract SpaceXAI can rely on, has already been held too faint to form a binding agreement, and three rulings in the same district since August have gone against xAI and X on their terms of service.

The SpaceXAI arbitration motion, filed Oct. 13, asks the court first to sever SpaceXAI's share of the case and transfer it to the Northern District of Texas, and only in the alternative to enter an order compelling arbitration. The reply is due Nov. 3 and the hearing is set for Nov. 18 before Chief Magistrate Judge Nathanael M. Cousins in San Jose. The outcome will decide whether one of the four alleged co-conspirators litigates apart from the other three, and it is the first test of whether a consumer contract can pull an AI lab out of a price-and-output antitrust class action.

Why does SpaceXAI want to arbitrate the AI slowdown lawsuit?

SpaceXAI wants out of the San Francisco Bay Area courtroom because its consumer terms point every dispute somewhere else. xAI's current consumer Terms of Service, which govern Grok and SuperGrok subscriptions, choose Texas law and require that disputes be brought in state or federal courts covering Tarrant County or Wichita County, Texas. Both counties sit in the Northern District of Texas. The same terms carry a Class Action Waiver and a jury-trial waiver, and they provide for arbitration if the forum-selection clause is found unenforceable. An earlier, 2025 version of the terms went further, requiring final and binding individual arbitration of claims together with a class waiver.

That structure explains the order of the motion. A valid forum-selection clause is normally enforced through a transfer motion under 28 U.S.C. § 1404(a), and under the Supreme Court's decision in Atlantic Marine Construction Co. v. U.S. District Court (2013), a court should transfer the case once it finds the clause valid and applicable, except in extraordinary circumstances unrelated to the convenience of the parties. Arbitration is the fallback because, under the current terms, it is the fallback. SpaceXAI therefore asked for transfer first and a Motion to Compel Arbitration second, and it paired both with a request to sever under Federal Rule of Civil Procedure 21 so that the claims against Anthropic, OpenAI and Google would stay in California without it.

Either route in the SpaceXAI arbitration motion would end the company's exposure to a nationwide Class Action in California. A transfer would put the Grok subclass before a Texas federal court applying a contract that waives class treatment, and arbitration would turn each subscriber's claim into a separate proceeding. Neither SpaceXAI's brief nor the precise version of the terms it relies on has been published in reporting available as of Oct. 30.

What did the plaintiffs argue against SpaceXAI's arbitration motion?

The plaintiffs argued that no contract was ever formed, so there is nothing to transfer under and nothing to arbitrate. According to MLex's account of the opposition, they told the court that SpaceXAI's sign-up screen placed its notice of terms in small, muted text beneath three sign-up buttons, a presentation the court has already found insufficient to impose the terms on users. Law360 reported the filing the same evening under the framing that users urged the judge not to let SpaceXAI separate itself from the proposed class.

The opposition does not need to attack the fairness of the Arbitration Clause or the Texas venue term to win. Contract formation comes before any question of enforceability. If a Grok subscriber never manifested assent to the terms, the forum-selection clause, the arbitration fallback and the class waiver all fall together, and SpaceXAI stays in the case as an ordinary defendant.

The plaintiffs also resist the request to sever. Their complaint pleads a single Section 1 conspiracy among four competitors, and the evidence of agreement (the same essay, the same day's public responses, the same alleged meetings) is common to every defendant. Splitting one alleged participant into a different forum would require overlapping discovery and risk inconsistent findings on whether an agreement existed at all.

Have courts enforced Grok's terms of service?

No. Three judges in the Northern District of California have declined to enforce xAI's or X's terms against users in 2026, on two different theories. None of the rulings has been reviewed by the Ninth Circuit.

Case	Judge	Date	What xAI or X sought	Result and reasoning
Skaggs v. X.AI, No. 26-cv-04550-BLF (Grok privacy class action)	Beth Labson Freeman	Aug. 13, 2026	Transfer to N.D. Tex. under the Grok forum clause	Denied: neither the sign-up screen nor the chat screen gave reasonably conspicuous notice, so no contract formed under the 2025 or 2026 terms
Doe v. SpaceX.AI Corp. (Grok deepfake suit)	P. Casey Pitts	Late Sept. 2026	Stay and transfer to N.D. Tex. under X's terms	Denied: forum-selection clause held unconscionable, buried near the end of the "General" section and one-sided with no business justification
Rose v. X.AI, No. 5:26-cv-05648 (SuperGrok auto-renewal class action)	N.D. Cal.	Oct. 22, 2026	Compel individual arbitration	Denied: plaintiff Devin Rose lacked reasonably conspicuous notice of the terms, including the arbitration provision, when he registered a free Grok account
Buist v. Anthropic (AI slowdown antitrust class action)	Nathanael M. Cousins (Chief Magistrate Judge)	Motion filed Oct. 13; opposition Oct. 27; hearing Nov. 18, 2026	Sever, transfer to N.D. Tex., or compel arbitration	Pending

Skaggs is the ruling the slowdown plaintiffs lean on. Austin Skaggs, a California resident, filed a putative class action on May 14, 2026 on behalf of US residents who entered queries into Grok.com. He did not argue that the Texas clause was unfair. He argued that he never agreed to it. Judge Freeman agreed, finding that the gray-on-black terms links on both screens failed the notice test, and that an advisal reading "By messaging Grok, you agree to our Terms and Privacy Policy" could not bind a visitor on the strength of the chat screen. Writing about the order, Eric Goldman highlighted the court's description of a visual gap between the terms language and the acceptance buttons, with empty space that buries the offer.

Rose applied the same formation logic to arbitration directly. The suit alleges that SuperGrok's cancellation process is difficult, lengthy and confusing and that subscribers were charged for unwanted renewals. The Oct. 22 order did not reach those merits; it held only that Rose never received reasonably conspicuous notice of the terms when he signed up for a free account, so he cannot be forced to arbitrate.

Doe took a different path. The plaintiffs there had apparently signed up for X and so arguably accepted its terms. Judge Pitts nonetheless refused to enforce the Texas venue clause, finding Procedural Unconscionability in its placement and Substantive Unconscionability in a one-sided structure that confined users to Texas while preserving the company's ability to sue elsewhere. The Volokh Conspiracy summarized the holding as finding the lack of mutuality "highly substantively unconscionable."

What is the AI slowdown antitrust lawsuit about?

The AI slowdown lawsuit claims that the four leading AI labs agreed to slow the pace of frontier model development, which the plaintiffs say is an unlawful restraint of trade under Section 1 of the Sherman Act. Charles Buist, Nick Spetsas, Cheyenne Hunt and Christine Bullock, each a paying subscriber to ChatGPT, Claude, Grok or Gemini, filed the proposed nationwide class action on Sept. 18, 2026.

The complaint is built around a single day. On Sept. 12, 2026, Anthropic CEO Dario Amodei published an essay titled "We Must Pace the Frontier," calling for industry-wide coordination on safety standards and on the rate of AI progress. According to the Associated Press, OpenAI's Sam Altman, SpaceXAI's Elon Musk and Google DeepMind's Demis Hassabis each publicly signaled agreement the same day. The plaintiffs say they have no objection to any one company choosing to slow down on its own, or to the companies lobbying Congress for rules; their objection is to competitors agreeing among themselves to limit output.

The proposed class covers people who bought paid individual subscriptions directly from a defendant from Sept. 12, 2026 onward, with a subclass for each company. Published summaries of the complaint describe the count as pleaded as a per se violation, with quick-look and rule-of-reason analysis in the alternative, and the relief sought includes Class Certification, an injunction, a declaration of violation and treble damages under Section 4 of the Clayton Act. Altman responded that OpenAI welcomes a "federal framework that sets consistent safety requirements." No court has found that any agreement exists, and the defendants had not answered or moved to dismiss as of docket summaries dated Oct. 20.

The subclass structure matters for the arbitration fight. Grok subscribers form their own subclass, so if SpaceXAI were severed, that subclass would either follow it to Texas or be pressed into individual arbitration, while the ChatGPT, Claude and Gemini subclasses proceed in California.

Can SpaceXAI be severed from the AI slowdown class action?

Severance under Rule 21 is discretionary, and the court weighs judicial economy, prejudice and the risk of inconsistent results. Courts often sever and transfer a single defendant when a valid forum-selection clause binds only that defendant's claims, because Atlantic Marine gives the clause heavy weight. The precondition, though, is a valid clause. If Judge Cousins follows Skaggs and finds that Grok users never agreed to the terms, there is no clause to enforce and little reason to carve one alleged conspirator out of a conspiracy case.

Even if a clause were found to bind some Grok subscribers, the court could still decline to sever. The named plaintiffs who subscribed to ChatGPT, Claude or Gemini have no contract with SpaceXAI at all, and a Section 1 plaintiff can recover from any participant in an unlawful agreement, not only from the company it bought from. That joint-and-several structure is one reason antitrust plaintiffs resist piecemeal transfers. The question of who is bound will therefore have to be answered plaintiff by plaintiff, much as it was in other recent Northern District of California rulings on online sign-up flows.

Who decides the SpaceXAI arbitration question: court or arbitrator?

The court decides. Whether an agreement to arbitrate was formed is a threshold question for a judge, not an arbitrator, and the Supreme Court reinforced that in Coinbase, Inc. v. Suski (2024), holding that a court must decide which of two conflicting contracts governs before any Delegation Clause can send Gateway Questions to an arbitrator. A delegation clause cannot do any work if the contract containing it was never accepted.

In the Ninth Circuit, formation of an online agreement is governed by Berman v. Freedom Financial Network (2022). Under Berman, a consumer is bound by terms not presented as a clickwrap only if the website gives reasonably conspicuous notice of the terms and the consumer takes an action, such as clicking a button, that unambiguously manifests assent to them. Notice is judged by the visual design of the specific screen: font size and color, contrast, placement relative to the action button, and surrounding clutter. Berman itself rejected a notice in tiny gray font that was less prominent than the surrounding text.

For the SpaceXAI arbitration motion, the plaintiffs' description of Grok's screen tracks Berman closely: small, muted text, placed below three competing sign-up buttons. Skaggs and Rose both found that same presentation insufficient. A San Jose magistrate judge is not formally bound by other district judges' rulings, but SpaceXAI will need to show either a different screen, a different sign-up path for these plaintiffs (for example, a paid SuperGrok checkout flow with an explicit checkbox), or a reason the earlier analysis was wrong.

The magistrate judge's role also has a procedural wrinkle. Under 28 U.S.C. § 636(c), a magistrate judge may enter final orders in a civil case only with the consent of all parties. If any defendant declines consent, the case would be reassigned to a district judge, or a magistrate judge could issue a report and recommendation on dispositive questions. Public reporting does not say whether every party has consented.

Could OpenAI, Anthropic and Google also move to compel arbitration?

They could try, but none had done so as of the docket summaries reviewed. OpenAI's consumer Terms of Use route disputes to individual arbitration with National Arbitration and Mediation (NAM) under its Comprehensive Dispute Resolution Rules, include a class waiver and a 30-day Opt-Out Clause, state that the Federal Arbitration Act (FAA) governs, and contain a batch provision triggered when 25 or more claimants represented by the same or similar counsel file demands. That is the kind of Mass Filing Threshold now common in consumer contracts. Third-party terms trackers report that Anthropic's consumer terms also contain an arbitration clause with a class waiver, though their summaries of the forum and administrator conflict.

Each defendant's motion would rise or fall on its own sign-up flow and its own named-plaintiff subscriber, since a Claude subscriber has no contract with OpenAI and vice versa. That creates a sequencing problem for the defense. A defendant that waits too long risks a Waiver of Arbitration argument; under Morgan v. Sundance (2022), the plaintiff no longer has to show prejudice to establish waiver, only that the defendant knowingly acted inconsistently with the right to arbitrate. A defendant that moves early, on the other hand, invites the same formation scrutiny Grok has faced.

What it means for drafters, defendants and claimants' counsel

For drafters. The Grok rulings are a reminder that the strongest Arbitration Clause is worthless if the screen that presents it fails the notice test. Terms placed in low-contrast type beneath several competing sign-up buttons have now failed twice in the Northern District of California. The safer structures are an unchecked box or a button whose own label states that clicking means agreement, placed directly adjacent to a visible hyperlink, and repeated at the paid checkout step. A forum clause that binds only the user, and not the company, also invites the unconscionability analysis that sank X's clause in Doe.

For defendants in multi-defendant antitrust cases. SpaceXAI's motion shows the strategic appeal of contractual exit in a conspiracy case, but also its limits. A defendant's terms can bind only its own customers, while Section 1 plaintiffs can pursue every participant for the full harm. Pairing transfer, severance and arbitration in one motion preserves every option but also concentrates the court's attention on the weakest link: formation.

For claimants' counsel and the Mass Arbitration bar. If Grok users are not bound, firms that were weighing a Mass Arbitration strategy against xAI lose the leverage of provider fees and instead keep the option of class litigation, as in Rose. If a court later finds a paid-checkout flow that does bind subscribers, the analysis flips, and xAI's arbitration fallback, class waiver and Texas venue would all come into play for that cohort. Counsel intaking Grok and SuperGrok users should document each client's sign-up path and dates, because the same company can have bound some users and not others.

For AI subscribers. The AI slowdown case is at the pleading stage, and no class has been certified. The arbitration ruling will decide where Grok subscribers' claims are heard, not whether they win.

What happens next in the SpaceXAI arbitration fight?

SpaceXAI's reply brief is due Nov. 3, 2026, and Judge Cousins has set the motion for hearing on Nov. 18, 2026. The court can rule from the bench, take the matter under submission, or order limited discovery into which sign-up screens each named plaintiff actually saw, a step courts sometimes take when the formation record is disputed.

Date	Event
Aug. 13, 2026	Skaggs v. X.AI: transfer to Texas denied for lack of conspicuous notice
Sept. 12, 2026	Amodei publishes "We Must Pace the Frontier"; Altman, Musk and Hassabis respond the same day
Sept. 18, 2026	Four subscribers file the proposed class action in the Northern District of California
Late Sept. 2026	Doe v. SpaceX.AI Corp.: X forum clause held unconscionable
Oct. 13, 2026	SpaceXAI moves to sever, transfer, or compel arbitration
Oct. 22, 2026	Rose v. X.AI: motion to compel arbitration denied
Oct. 27, 2026	Plaintiffs file opposition
Nov. 3, 2026	SpaceXAI reply due
Nov. 18, 2026	Hearing before Chief Magistrate Judge Cousins

The appeal options are asymmetric. If the court denies the alternative request to compel arbitration, SpaceXAI can take an immediate appeal to the Ninth Circuit under 9 U.S.C. § 16(a), and under Coinbase, Inc. v. Bielski (2023) the district court must stay its proceedings on the claims covered by that appeal until the Ninth Circuit rules. An order denying transfer under a forum-selection clause, by contrast, is not immediately appealable and can be challenged only by a petition for mandamus. The arbitration fallback in xAI's terms is therefore worth more to SpaceXAI procedurally than it may look on paper: it is the piece of the motion that can buy an appeal and a stay.

FAQ

What is the SpaceXAI arbitration motion?

It is SpaceXAI's Oct. 13, 2026 motion in the AI slowdown antitrust case asking the court to sever the claims against it and transfer them to the Northern District of Texas or, alternatively, to compel individual arbitration under xAI's consumer terms. It will be heard Nov. 18, 2026.

Why do the plaintiffs say SpaceXAI cannot arbitrate?

They say Grok users never agreed to xAI's terms because the sign-up screen shows the terms notice in small, muted text below three sign-up buttons, which the Northern District of California has already held is not reasonably conspicuous notice.

Have any courts enforced Grok's terms of service?

No reported 2026 ruling has. Skaggs v. X.AI (Aug. 13) and Rose v. X.AI (Oct. 22) found no contract formed through Grok's screens, and Doe v. SpaceX.AI Corp. found X's Texas forum clause unconscionable.

Who is suing Anthropic, OpenAI, SpaceXAI and Google?

Four paid subscribers, Charles Buist, Nick Spetsas, Cheyenne Hunt and Christine Bullock, filed the proposed class action on Sept. 18, 2026, alleging a Sherman Act Section 1 agreement to slow AI development.

Can SpaceXAI appeal if it loses the arbitration motion?

Yes. A denial of a motion to compel arbitration is immediately appealable under 9 U.S.C. § 16(a), and Coinbase v. Bielski requires a stay of the arbitrable claims during that appeal. A denial of transfer is not immediately appealable.

Does the ruling affect Grok users outside this lawsuit?

Not directly. Formation is decided user by user, but every ruling that Grok's sign-up screen fails the notice test makes it harder for xAI to force other Grok users into arbitration or into Texas courts.