Elon Musk Sues OpenAI, Microsoft for $134 Billion
Analysis based on 28 articles · First reported Jan 17, 2026 · Last updated Jan 19, 2026
The lawsuit by Elon Musk against OpenAI and Microsoft, seeking up to $134 billion, introduces significant uncertainty for both companies, particularly OpenAI's valuation and future operational structure. This legal battle could set precedents for how non-profit origins and commercial pivots are judged in the rapidly expanding AI industry, potentially affecting investor confidence and future collaborations in the sector.
Elon Musk is suing OpenAI and Microsoft for up to $134 billion, alleging that OpenAI defrauded him by abandoning its original non-profit mission and shifting to a profit-driven model, heavily influenced by Microsoft. Musk, a co-founder of OpenAI, claims he contributed approximately $38 million in seed funding and provided crucial technical and business advice, which he argues entitles him to a share of the 'wrongful gains' made by OpenAI and Microsoft. Financial economist Paul Wazzan, an expert witness for Musk, calculated the damages based on OpenAI's current $500 billion valuation, estimating 'wrongful gains' of $65.5 billion to $109.4 billion for OpenAI and $13.3 billion to $25.1 billion for Microsoft. OpenAI and Microsoft have vehemently denied Musk's allegations, calling the lawsuit baseless and part of an ongoing 'harassment campaign'. A federal judge has rejected attempts by OpenAI and Microsoft to dismiss the case, clearing the way for a jury trial expected to begin in late April in Oakland, California. Musk also plans to seek punitive damages and a possible injunction.
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