OpenAI moves to dismiss xAI antitrust suit using SEC filings

By Splitfeed EditorialLast updated Sep 26, 2026, 19:17 UTC

On September 23, 2026, OpenAI filed a motion to dismiss an antitrust lawsuit brought by Elon Musk's AI company xAI. The core of OpenAI's argument is that SEC disclosures filed by SpaceX, Musk's rocket company, contain information that directly contradicts the factual basis of xAI's antitrust claims. OpenAI's legal team is using those public regulatory filings as evidence that the suit should not proceed. Separately, around September 25, Musk stated publicly that SpaceX's AI work would surpass both Anthropic and OpenAI within six months, a claim that drew attention primarily for what it might mean for SpaceX's valuation.

The lawsuit sits inside a broader and acrimonious legal dispute between Musk and OpenAI that stretches back to Musk's departure from OpenAI's board and his subsequent founding of xAI as a direct competitor. Antitrust cases of this kind are difficult to win, and the unusual tactic of citing a rival's own regulatory filings as a rebuttal is notable because SEC disclosures carry legal weight and are difficult for the filer to later disavow. What is genuinely in dispute is whether those SpaceX filings actually contradict xAI's specific antitrust allegations, or whether OpenAI is reading them selectively. The motion to dismiss does not end the case; a judge will decide whether the complaint survives.

None of the three camps, Pro-AI, Anti-AI, or Middle Ground, had published reactions to this story by the time of reporting. Pro-AI voices would typically treat the motion to dismiss as evidence that the lawsuit lacks merit and frame it as a legally aggressive but legitimate competitive response. Anti-AI commentators would more likely focus on the power dynamics involved, arguing that large incumbent players use procedural motions to exhaust smaller challengers, even if xAI itself is a well-funded operation. Middle Ground observers would generally be expected to wait for a judicial ruling before drawing conclusions, treating the legal back-and-forth as unresolved and the outcome as genuinely uncertain.

The clearest next signal will be the court's ruling on the motion to dismiss. If the judge denies the motion, xAI's antitrust claims survive and the case moves toward discovery, which could surface internal documents from both sides. If the motion is granted, the suit ends unless xAI appeals or refiles with amended claims. Musk's six-month competitive claim about SpaceX AI is a separate thread worth revisiting around March 2027, when that window would close.