Private notes revealed in the lawsuit filings show the foundational split wasn't purely philosophical. Discussions about personal wealth targets ("what will take me to $1 billion?") and Elon Musk's desire for majority equity to fund Mars ambitions underscore that the battle was fundamentally about power and financial gain.

The lawsuit between Elon Musk and OpenAI has unearthed private communications showing fundamental disagreements. Musk allegedly wanted OpenAI to generate $80 billion for a Mars city and give him majority control, with his children eventually controlling AGI. OpenAI's founders resisted, leading to the split.

Internal notes revealed in Elon Musk's lawsuit suggest OpenAI's leadership intentionally deceived him. They allegedly took his money under the premise of an open-source non-profit while privately planning a closed, for-profit structure, creating a massive legal and reputational risk.

OpenAI's core argument is they could have raised funds without Elon and that the shift to a for-profit model was a necessary response to AI's "scaling laws"—a reality Elon himself acknowledged when proposing an acquisition by Tesla.

The core legal question is why OpenAI's leadership transitioned the non-profit instead of creating a fresh for-profit entity. This implies the non-profit's accumulated IP and team were too valuable to abandon, which is the foundation of Elon's 'bait and switch' claim that the original mission was hijacked.

The core of Elon Musk's lawsuit is the argument that OpenAI breached its founding non-profit mission. The case's success hinges on keeping the focus on this alleged betrayal, but it is weakened whenever Musk's own ego and personality become the central issue during testimony.

The Musk v. OpenAI trial uncovered that Musk attempted to merge OpenAI into Tesla in 2017, even planning to recruit Sam Altman. This shows his deep, early interest in controlling a leading AI lab, predating his public fallout with the company and current xAI venture.

OpenAI's transformation from a non-profit to a for-profit entity is framed as a fundamental deception. This "bait and switch" enabled it to amass data and talent under the benevolent banner of research, a move that would have been fiercely resisted by creators and competitors had its commercial ambitions been transparent.

In his testimony, Elon Musk frames his lawsuit against OpenAI as a crucial test case. He argues that companies should not be allowed to begin as charities, solicit tax-deductible donations, and later pivot to a for-profit model, which he characterizes as a misuse of public trust and taxpayer funds.