How Sam Altman Unleashed Elon Musk's 'Demon Mode' According to His Biographer

The relationship between Elon Musk and Sam Altman has been a subject of interest, especially given their history with OpenAI. According to Walter Isaacson, Elon Musk’s biographer, Musk has a distinct look when discussing Sam Altman, which isn’t pleasant. Isaacson described this as “demon mode,” a term used to characterize Musk’s intense reaction when feeling betrayed, particularly by Altman.

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Chinese EV Rival Leaves Tesla's Robot in the Dust with 33-to-1 Sales Ratio

The world of robotics has a new competitor, and it’s giving Tesla a run for its money. While Elon Musk’s company is still in the early stages of developing its humanoid robot, Optimus, a Chinese rival is already shipping thousands of units globally. According to recent data, China’s Unitree Robotics has sold over 5,000 humanoid robots in 2025, leaving Tesla’s Optimus in the dust with only around 150 units sold.

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