The feud between Elon Musk and OpenAI is getting even more contentious as the two sides get ready for trial later this month. The latest development in the legal back-and-forth saw OpenAI accuse Elon Musk and his latest proposals as a “legal ambush,” as first reported by Bloomberg. OpenAI filed its response on Friday, which detailed that Musk was “sandbagging the defendants and injecting chaos into the proceedings, while trying to recast his public narrative about his lawsuit.”

The lawsuit dates back to 2024 when Elon Musk sued both OpenAI and Microsoft, accusing the AI giant of ditching its original mission of being a non-profit and instead converting into a for-profit business after receiving financial backing and forming a partnership with Microsoft. Prior to OpenAI’s latest filing, Musk amended his original complaint to instead award any damages received to OpenAI’s nonprofit arm instead. Musk’s amendment, which was filed earlier this month, also sought to oust Altman from his role as OpenAI’s CEO and board member. In OpenAI’s Friday filing, the AI company claimed that Musk’s last-minute changes were “legally improper and factually unsupported.”

There’s a lot at stake with this lawsuit since Musk is reportedly seeking anywhere between $79 billion and $134 billion in “wrongful gains.” With both OpenAI and Microsoft denying any wrongdoing, according to Bloomberg, the trial is still set to kick off on April 27.