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Musk Sues OpenAI and Microsoft for Up to $134 Billion as Unsealed Files Fuel Fraud Fight

Investor messaging signals OpenAI’s effort to manage perceptions before an April jury trial.

Overview

  • Elon Musk filed a federal claim seeking between $79 billion and $134 billion, arguing OpenAI and Microsoft were unjustly enriched by OpenAI’s shift to a profit-driven structure.
  • A court unsealed more than 100 discovery records, including Greg Brockman’s 2017 diary and allegations that Sam Altman held indirect OpenAI-related interests, which Musk cites as central evidence.
  • OpenAI warned investors that Musk will make deliberately outrageous statements and contended the dispute should not be valued above roughly the $38 million he donated.
  • OpenAI and Microsoft deny wrongdoing, and a jury trial is scheduled to start on April 27, 2026, with proceedings expected to run about four weeks.
  • Industry currents include the stealth exit of Altman’s Merge Labs with a reported $250 million seed led by OpenAI and reports of senior departures from Thinking Machines Lab with several returning to OpenAI.