Observed Signal · Apr 29, 2026 · Trial · Source: CNBC Technology · Impact: 3/5 · Sentiment: Neutral
Musk Cross-Examined in OpenAI Trial
On April 29, 2026, Elon Musk continued testifying in his lawsuit challenging OpenAI’s conversion from a nonprofit to a for-profit structure. During a heated cross-examination by OpenAI attorney William Savitt, Musk said he lacked detailed knowledge of OpenAI’s internal safety efforts and was unsure what “safety cards” are. Musk reiterated that his roughly $38 million in early donations helped found OpenAI and said Microsoft’s reported $10 billion investment was a tipping point that eroded his trust in the organization. The case centers on claims of breach of charitable trust and unjust enrichment; Microsoft is also a named defendant. Judge Yvonne Gonzalez Rogers is overseeing a two-phase trial (liability then remedies). Musk’s testimony is expected to continue, and Jared Birchall is slated as the next witness.
High-profile litigation involving OpenAI, Microsoft and Elon Musk could influence governance, investor expectations and public debate around the structure and commercialization of major AI developers, but it is not an immediate industry-wide technical or regulatory change.
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Key Takeaways & Evidence Grounding
- Elon Musk testified at the Musk v. OpenAI trial on April 29, 2026.
- Musk said he contributed about $38 million to OpenAI in its early days.
- Musk testified Microsoft’s reported $10 billion investment in OpenAI was a tipping point for his loss of trust.
- The lawsuit alleges breach of charitable trust and unjust enrichment; Microsoft is named as a defendant.
- Judge Yvonne Gonzalez Rogers split the trial into a liability phase (advisory jury) and a possible remedies phase.
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Musk vs OpenAI Trial Reveals Control and Donation Dispute
During the second week of the Elon Musk v. OpenAI trial, OpenAI president Greg Brockman testified that Musk pushed the company to create a for‑profit arm and sought “absolute control” over it. Musk previously testified that OpenAI CEO Sam Altman and Brockman deceived him into donating $38 million by promising to keep the organization nonprofit; OpenAI later accepted large investments from Microsoft and restructured to operate a for‑profit subsidiary. The court proceedings have included testimony, diary excerpts and other witness accounts; the trial is occurring as OpenAI plans a public listing. The reporting is an MIT Technology Review analysis republished on t3n and was written by Michelle Kim (published 2026‑05‑11).
Musk v. Altman: High‑Profile OpenAI Lawsuit Continues
Elon Musk spent roughly three days on the witness stand this week in his lawsuit against OpenAI, where he alleges that Sam Altman betrayed OpenAI’s original nonprofit mission by converting the organisation to a for‑profit model. During testimony, emails, texts and Musk’s tweets have been introduced as evidence. TechCrunch’s Equity podcast (video) covered the courtroom developments, noted more witnesses remain to testify, and discussed related topics including Big Tech earnings and the limits of the current AI spending cycle. The piece was published by TechCrunch on May 1, 2026.
Musk Testimony Dominated First Week of Musk v. Altman
The first week of the Musk v. Altman trial in Oakland concluded May 2, 2026, after Elon Musk testified for three days, telling the jury OpenAI leaders tried to "steal a charity." Musk sued OpenAI, CEO Sam Altman and President Greg Brockman in 2024, alleging they reneged on promises to keep OpenAI a nonprofit and misused about $38 million Musk donated. OpenAI, which has raised large private capital and counts Microsoft among investors, calls the claims baseless. Musk’s legal team seeks up to $134 billion in damages and wants remedies including reversing OpenAI’s for-profit conversion and removing Altman and Brockman. Judge Yvonne Gonzalez Rogers is presiding; the trial was split into a liability phase expected to conclude by May 21, 2026.
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