A group of former OpenAI employees has filed an amicus brief supporting Elon Musk's lawsuit against OpenAI, challenging the company's shift from a non-profit to a for-profit model. The brief argues this transition violates OpenAI's foundational mission and could jeopardize safety in AI development. OpenAI maintains that its non-profit arm will persist while restructuring into a public benefit corporation. The lawsuit, which seeks a preliminary injunction against the conversion, is set for jury trial in spring 2026. Concerns over accountability and the potential for profit-driven motives are central to the ex-employees' claims.