- OpenAI filed a court response on April 11 calling Musk’s last-minute complaint amendments a “legal ambush” designed to disrupt proceedings before the April 27 trial date.
- Musk’s amended complaint seeks to redirect any damages to OpenAI’s nonprofit arm and remove CEO Sam Altman from his role and board seat.
- Musk is seeking between $79 billion and $134 billion in alleged wrongful gains from OpenAI and Microsoft.
- Both OpenAI and Microsoft have denied wrongdoing; trial remains scheduled for April 27.
What Happened
OpenAI filed a legal response on Friday, April 11, accusing Elon Musk of orchestrating a “legal ambush” by submitting substantive revisions to his complaint against the company just weeks before trial. The filing, first reported by Bloomberg, stated that Musk was “sandbagging the defendants and injecting chaos into the proceedings, while trying to recast his public narrative about his lawsuit.” Trial is set to begin April 27, with both OpenAI and Microsoft named as defendants.
Why It Matters
Musk’s original complaint, filed in 2024, alleged that OpenAI violated its founding mission as a nonprofit by pivoting toward commercial operations after forming a financial partnership with Microsoft. The case has drawn sustained industry attention because it directly tests whether written charter commitments made by a nonprofit are legally enforceable against an organization that later restructures to attract private capital — a question with direct relevance as AI labs increasingly shift from hybrid nonprofit structures toward for-profit models.
The lawsuit also runs parallel to OpenAI’s ongoing effort to convert from a nonprofit-controlled entity to a for-profit public benefit corporation, a transition that has drawn regulatory review. A ruling that OpenAI’s original nonprofit obligations are legally binding could significantly complicate that conversion process.
Technical Details
Musk’s amended complaint, filed earlier in April 2026, introduced two substantive changes to the 2024 original. The first sought to redirect any damages awarded in the case to OpenAI’s nonprofit arm — shifting who would benefit from a successful verdict away from Musk and toward the organization he alleges was wronged. The second added an explicit demand that Sam Altman be removed from his position as OpenAI’s chief executive officer and from the company’s board of directors.
In its April 11 response, OpenAI characterized both amendments as “legally improper and factually unsupported,” arguing they were procedurally invalid given how close they were filed to the trial date. Bloomberg reported the financial scope of Musk’s claim: between $79 billion and $134 billion, framed in the complaint as “wrongful gains” accumulated by OpenAI and Microsoft through their partnership.
Who’s Affected
OpenAI and Microsoft face the most direct legal exposure and have each denied wrongdoing. A damages award at even the low end of Musk’s $79 billion figure would represent one of the largest civil judgments against a technology company in U.S. history, with immediate consequences for OpenAI’s governance structure and its pending corporate conversion. Altman’s leadership is directly at stake in the amended complaint, which explicitly seeks his removal as CEO and board member — a demand OpenAI has called factually unsupported.
The case also carries secondary implications for OpenAI’s investors and commercial partners, who would face significant structural uncertainty around the company’s governance in the event of an adverse ruling.
What’s Next
Before the April 27 trial begins, a judge must decide whether Musk’s amended complaint revisions are procedurally permissible — OpenAI’s Friday filing formally opposes their inclusion. If the amendments are rejected, the case proceeds on the original 2024 complaint terms. If admitted, the scope expands to include the demand for Altman’s removal and the redirect of any damages to the nonprofit arm. Both OpenAI and Microsoft have maintained their denials of wrongdoing as the court date approaches.
