The rivalry between Elon Musk and Sam Altman has reignited on social media. Musk announced he would initiate legal action against Apple.

Musk accused Apple of prioritizing OpenAI's ChatGPT application, claiming it stifled competition. This led to his announcement of legal action on behalf of his AI company, xAI.

Altman responded by alleging that Musk manipulated the X algorithm to serve his interests. This exchange marks the latest chapter in their long-standing rivalry.

Since leaving OpenAI in 2018, Musk has become one of its fiercest critics. The latest dispute flared up following the announcement of OpenAI's new GPT-5 model.

Musk claimed that his AI system, Grok 4 Heavy, is superior to GPT-5, while Altman stated they would focus on creating significant products.