Short Answer

Both the model and the market expect Elon to win his case against OpenAI before 2027, with no compelling evidence of mispricing.

1. Market Behavior & Drivers

This prediction market displays a distinct downward trend, with the probability of Elon Musk winning his case against OpenAI declining from a starting point of 50.0% to a current price of 22.0%. The market has operated within a price range of 18.0% to 50.0%. One of the most significant movements was a 13.0 percentage point drop around May 15, which appears to be linked to the conclusion of closing arguments and subsequent news reports reiterating legal challenges for Musk's position. An earlier 10.0 percentage point spike occurred around May 4, though a specific driver for this temporary increase in odds cannot be identified from the provided information. Similarly, the initial decline from the 50.0% peak lacks a clearly identified catalyst in the available context.
Overall market sentiment, as reflected by the price chart, is strongly pessimistic about Musk's chances of winning. The initial 50.0% price can be seen as an early resistance level that was decisively broken to the downside, while the recent low of 18.0% has established a new support level. Total volume of over 627,000 contracts indicates substantial market participation. Sampled volume data suggests trading activity was higher during periods of higher prices and uncertainty earlier in May, potentially indicating that conviction grew among market participants as the price declined. The sustained downward pressure and the sharp drop following closing arguments suggest that traders have increasingly viewed a victory for Musk as an unlikely outcome as the trial has progressed.
  • Legal experts generally view Elon Musk's breach of contract claim as weak.
  • Judge Yvonne Gonzalez Rogers likely applies Ninth Circuit and California law.
  • Musk's counsel alleged breach of trust during closing arguments in May 2026.
  • OpenAI defended its for-profit transition as strategic recapitalization at trial.
  • The trial concluded evidence presentation and closing arguments on May 16, 2026.
  • Judge Yvonne Gonzalez Rogers will determine the final verdict and remedies.

Who Wins and Why

Outcome Market Model Why
Before 2027 21.0% 16.2% A swift resolution could result from an early motion to dismiss or a settlement agreement.

Current Context

Jury deliberations begin soon in Elon Musk's case against OpenAI. The trial between Elon Musk and OpenAI, led by Sam Altman and Greg Brockman, concluded its closing arguments on May 16, 2026, in federal court in Oakland, California [1][2][3]. A nine-person jury is scheduled to commence deliberations on Monday, May 18, 2026. U.S. District Judge Yvonne Gonzalez Rogers presides over the case, and while the jury will provide findings, the judge retains the final authority to decide on liability and appropriate remedies, which could include potential structural changes or the removal of leadership [1][2][3].
Musk alleges OpenAI breached its founding charitable mission. His lawsuit claims that OpenAI violated a charitable trust by shifting from its original nonprofit mission to a for-profit structure [1][4][2][5]. As remedies, Musk is seeking the removal of Altman and Brockman from their positions and a court order to unwind the company's for-profit conversion [1][4][2][5].
Experts are skeptical about Musk's legal victory, but other impacts are possible. Legal experts have expressed doubts regarding Musk's likelihood of winning the case, noting that he faces a significant challenge in proving his claims [6][7]. Furthermore, the company's restructuring was previously approved by the attorneys general of California and Delaware [6]. Despite the skepticism, some analysts suggest that even if Musk loses in court, the case could potentially exert pressure on regulators to re-examine OpenAI's operations [6][7].
Sources (7)
  1. 1Musk, Altman Make Final Pitches to Jury in Battle Over OpenAInews.bloomberglaw.com
  2. 2Jury deliberations to begin in OpenAI nonprofit trial after Musk skips closing for Beijingthenextweb.com
  3. 3OpenAI Jury To Begin Deliberations Monday as Judge Weighs Altman Removal and $500B Restructure Reversaltechtimes.com
  4. 4Musk vs Altman enters final stage as jury begins deliberations in blockbuster OpenAI trialfinancialexpress.com
  5. 5Elon Musk vs Sam Altman: how the legal battle of the tech billionaires could shape the future of AItheconversation.com
  6. 6Elon Musk could lose his legal case against OpenAI and still get most of what he wants. | Voxvox.com
  7. 7Musk could beat OpenAI even if he loses case, experts sayeuropesays.com

2. Price Chart

Historical Price (Probability)

Outcome probability
Date

3. Significant Price Movements

Notable price changes detected in the chart, along with research into what caused each movement.

📉 May 15, 2026: 13.0pp drop

Price decreased from 31.0% to 18.0%

Outcome: Before 2027

What happened: The primary driver of the 13.0 percentage point drop on May 15, 2026, was the conclusion of closing arguments in Musk v. OpenAI on May 14, 2026 [1]. News reports following these arguments reiterated significant legal hurdles for Musk, specifically the U.S. District Judge's prior dismissal of Musk's fraud claims [1] and her stated likelihood of directing a verdict for the defendants if the jury finds the lawsuit was filed outside the statute of limitations [1]. This re-emphasis of the judge's strong position, combined with the fact that the jury's verdict is merely advisory, with the judge retaining final authority [2], likely led to a reassessment of Musk's probability of winning. Social media was not a primary driver, as no relevant activity was identified in the available sources.

📈 May 04, 2026: 10.0pp spike

Price increased from 38.0% to 48.0%

Outcome: Before 2027

What happened: Based on the provided web research, the primary driver for the 10.0 percentage point spike in the prediction market on May 04, 2026, cannot be identified. On that date, CNBC reported that Elon Musk's odds of winning his case against OpenAI were considered slim, with probabilities fluctuating around 34% to 40% in early May 2026 [3], which would typically not cause an upward spike in his favor. The available sources do not mention any specific social media activity from key figures or viral narratives, nor any market structure factors that would explain this movement. Consequently, social media activity appears irrelevant to this specific price movement based on the provided information.

📉 May 02, 2026: 13.0pp drop

Price decreased from 50.0% to 37.0%

Outcome: Before 2027

What happened: Based on the provided web research, there is no evidence found regarding a "13.0 percentage point drop" in the prediction market for "Will Elon win his case against OpenAI?" on May 02, 2026 [4][5][6]. The research explicitly states this term "may be a misinterpretation of financial data or unrelated market commentary" [4][5][6]. Therefore, without substantiation of the market movement itself, identifying a primary driver, whether from social media or traditional news, is not possible. The available information primarily details the conclusion of the trial's closing arguments and upcoming jury deliberations around May 16-18, 2026, which occurred after the alleged movement date [4][7][8]. Social media activity is irrelevant as a primary driver since the premise of the price drop is not supported.
Sources (8)
  1. 1Closing arguments begin in Elon Musk’s landmark lawsuit against OpenAI | Elon Musk News | Al Jazeeraaljazeera.com
  2. 2Jury deliberations to begin in OpenAI nonprofit trial after Musk skips closing for Beijingthenextweb.com
  3. 3Elon Musk’s odds of winning lawsuit against OpenAI are slim, Kalshi traders saycnbc.com
  4. 4Musk, Altman Make Final Pitches to Jury in Battle Over OpenAInews.bloomberglaw.com
  5. 5What the jury will actually decide in the case of Elon Musk vs. Sam Altmantechcrunch.com
  6. 6OpenAI closing arguments conclude in Musk vs. Altman trialyoutube.com
  7. 7Musk vs Altman enters final stage as jury begins deliberations in blockbuster OpenAI trialfinancialexpress.com
  8. 8OpenAI trial live updates: Closing arguments begin in landmark case – NBC Bay Areanbcbayarea.com

4. Market Data

Contract Snapshot

The market resolves to "Yes" if the U.S. District Court in the Northern District of California rules in favor of Elon Musk in Musk v. Altman et al before January 1, 2027. Otherwise, it resolves to "No." The market opened on January 14, 2026, and will close upon the outcome or by January 1, 2027, with official judicial records serving as the primary source for resolution, followed by a hierarchy of other specified court and news agencies.

Available Contracts

Market options and current pricing

Outcome bucket Yes (price) No (price) Last trade probability
Before 2027 $0.21 $0.80 21%

Market Discussion

Traders are divided, with a strong contingent betting "No" on Elon Musk winning his case. Those expecting a "No" outcome frequently cite reports that the judge dismissed 25 out of 27 of Musk's claims, believing that OpenAI's lawyers effectively discredited the core arguments and that Musk's case has little legal merit. Conversely, "Yes" supporters question the validity of the skepticism surrounding the case, suggesting it might still swing in Musk's favor.

5. What is the legal expert consensus on the merits of Elon Musk's breach of contract claim against OpenAI?

Legal assessment of breach claimWeak merits [1][2][3][4]
Trial commencementLate April 2026 in Oakland, California [5][6][7][8]
Musk's win probability (Kalshi)40%–42% before 2027 (as of May 16, 2026) [3][9][4][10]
Legal experts generally find Elon Musk's breach of contract claim weak. Many legal experts largely view Elon Musk's breach of contract claim against OpenAI as having weak merits [1][2][3][4]. This perspective is attributed to significant ambiguities within the alleged "founding agreement," concerns about legal standing, and the pre-trial dismissal of crucial fraud allegations [1][2][3][4].
The ongoing trial focuses on breach of charitable trust. The trial commenced in late April 2026 in a federal court in Oakland, California, and currently centers on claims of breach of charitable trust and unjust enrichment [5][6][7][8]. A nine-person jury is tasked with adjudicating these specific claims, while the judge will determine the appropriate remedies [5][6][7][8].
Prediction markets indicate a decreasing chance of Musk winning. As of May 16, 2026, prediction markets such as Kalshi estimated the likelihood of Elon Musk winning his case against OpenAI before 2027 to be approximately 40%–42% [3][9][4][10]. This figure represents a decrease from higher probabilities recorded earlier in the trial [3][9][4][10].
Sources (10)
  1. 1https://law.duke.edu/web/sites/default/files/pdf/Daily_Journal-Open_AI.pdflaw.duke.edu
  2. 2The legal premise of Elon Musk’s OpenAI lawsuit is weak. But the questions it raises are notfortune.com
  3. 3Elon Musk Court Case Odds: Will Musk Win Lawsuit Against Sam Altman, Open AI in 2026?oddschecker.com
  4. 4Wil Elon Win His Case Against OpenAI?next.io
  5. 5What the jury will actually decide in the case of Elon Musk vs. Sam Altmantechcrunch.com
  6. 6Musk v. Altman Is a Battle for OpenAI’s Soul | WIREDwired.com
  7. 7https://storage.courtlistener.com/recap/gov.uscourts.cand.433688/gov.uscourts.cand.433688.390.0.pdfstorage.courtlistener.com
  8. 8Musk and Altman face off in court over future of OpenAI: NPRnpr.org
  9. 9Elon Musk odds low to win OpenAI suitcnbc.com
  10. 10Elon Musk vs. OpenAI: Kalshi Traders Push Odds to 45% as Trial Date Approaches - Microsoft (NASDAQ:MSFT)benzinga.com

6. What key legal precedents will Judge Yvonne Gonzalez Rogers likely rely on when ruling on OpenAI's corporate restructuring?

Preliminary Injunction StandardWinter v. Natural Resources Defense Council (2008) standard [1][2][3]
Breach of Charitable Trust RequirementExpress, written condition on donations [1][2]
Unjust Enrichment ClassificationTreated as a quasi-contract claim [4][5][6]
Judge Yvonne Gonzalez Rogers applies established Ninth Circuit and California law to corporate restructuring. She is expected to rely on precedents concerning unjust enrichment, antitrust, and breach of charitable trust. For preliminary injunctions, she consistently applies the Winter v. Natural Resources Defense Council (2008) standard, which requires proof of a likelihood of success on the merits, irreparable harm, a favorable balance of equities, and that the injunction serves the public interest [1][2][3]. The "likelihood of success on the merits" component will be particularly critical in evaluating challenges to corporate restructuring decisions.
Regarding breach of charitable trust claims, Judge Gonzalez Rogers sets a high bar for extraordinary relief. She mandates that plaintiffs demonstrate an express, written condition on donations to successfully establish an enforceable charitable trust [1][2]. Without clear evidence of such conditions, plaintiffs typically face difficulty achieving success on the merits for these specific claims [1][2]. Additionally, she consistently rules that unjust enrichment functions as a quasi-contract claim, not a standalone cause of action [4][5][6].
For antitrust claims, she requires specific proof under the Sherman Act. Judge Gonzalez Rogers’s rulings affirm the necessity of proving a relevant market and antitrust standing [4][5][6]. She has referenced precedents such as Pacific Bell Tel. Co. v. linkLine Communications, Inc. and Thurman Industries, Inc. v. Pay 'N Pak Stores, Inc. to uphold these requirements [4][5][6].
Sources (6)
  1. 1https://storage.courtlistener.com/recap/gov.uscourts.cand.433688/gov.uscourts.cand.433688.121.0.pdfstorage.courtlistener.com
  2. 2https://storage.courtlistener.com/recap/gov.uscourts.cand.433688/gov.uscourts.cand.433688.64.24.pdfstorage.courtlistener.com
  3. 3https://storage.courtlistener.com/recap/gov.uscourts.cand.433688/gov.uscourts.cand.433688.65.22.pdfstorage.courtlistener.com
  4. 4https://storage.courtlistener.com/recap/gov.uscourts.cand.433688/gov.uscourts.cand.433688.330.85.pdfstorage.courtlistener.com
  5. 5https://storage.courtlistener.com/recap/gov.uscourts.cand.433688/gov.uscourts.cand.433688.328.87.pdfstorage.courtlistener.com
  6. 6https://storage.courtlistener.com/recap/gov.uscourts.cand.249697/gov.uscourts.cand.249697.1004.2.pdfstorage.courtlistener.com

7. How do the remedies sought by Musk, such as removing Sam Altman, compare to penalties in past high-profile breach of fiduciary duty lawsuits?

Musk's requested remedyDisgorgement of wrongful gains, removal of Sam Altman and Greg Brockman, and restructuring to nonprofit [1][2][3]
Probability of winning40-42% before 2027 (as of May 2026) [4][5][6]
Common past remediesMonetary damages (disgorgement), constructive trusts, occasional removal of officers [7][8][9][10]
Elon Musk seeks significant remedies, including executive removal and financial restructuring. His lawsuit against OpenAI proposes the disgorgement of wrongful gains, which his expert Dr. Wazzan has calculated and suggested be directed to the nonprofit OpenAI [1][2][3]. Additionally, Musk aims for an injunction to remove Sam Altman and Greg Brockman from their leadership positions and a court-ordered restructuring to revert OpenAI to its original nonprofit mission [1][2][3].
Past breach of fiduciary duty cases show similar, but cautious, remedies. In high-profile breach of fiduciary duty cases, particularly those heard in Delaware Chancery Court, common remedies involve monetary damages, such as the disgorgement of gains, and the use of constructive trusts to prevent unjust enrichment [7][8][9][10]. While courts may order the removal of directors or officers, this typically occurs only if bad faith or disloyalty is demonstrated, as courts generally adhere to the business judgment rule unless such issues are proven [7][8][9][10].
Musk's likelihood of winning his lawsuit is currently estimated at 40-42%. As of May 2026, prediction markets estimate Elon Musk's probability of winning his case against OpenAI before 2027 to be approximately 40-42% [4][5][6]. This figure represents a decrease from initial higher odds, following his testimony and the dismissal of his original fraud claims [4][5][6].
Sources (10)
  1. 1https://storage.courtlistener.com/recap/gov.uscourts.cand.433688/gov.uscourts.cand.433688.392.0.pdfstorage.courtlistener.com
  2. 2OpenAI opposes Elon Musk’s “amended” notice of remedies as belated bait and switch weeks before trial – Chat GPT Is Eating the Worldchatgptiseatingtheworld.com
  3. 3What Elon Musk and OpenAI's High-Profile Court Case Is Actually Aboutbigtechnology.com
  4. 4Wil Elon Win His Case Against OpenAI?next.io
  5. 5Elon Musk odds low to win OpenAI suitcnbc.com
  6. 6Musk lawsuit adds uncertainty to OpenAI IPO plans before 2027cryptobriefing.com
  7. 7Delaware Supreme Court Affirms Breach Of Fiduciary Duty Judgment Against CEO But Reverses Bidder's Aiding And Abetting Liability - Corporate and Company Law - United Statesmondaq.com
  8. 8Delaware Court Of Chancery Upholds CEO Termination Under The Business Judgment Rule In High-Profile Family Business Dispute - Securities - United Statesmondaq.com
  9. 9https://courts.delaware.gov/Opinions/Download.aspx?id=379460courts.delaware.gov
  10. 10https://courts.delaware.gov/Opinions/Download.aspx?id=375490courts.delaware.gov

8. How did the closing arguments from Musk's legal team contrast with those from OpenAI's counsel in May 2026?

Trial PhaseClosing arguments in Musk v. OpenAI trial (May 2026 [1][2][3][4])
Musk's Initial Donation Claim$38 million (cited as basis for charitable trust) [1][2][3]
OpenAI Defense StanceLack of evidence and Musk's retaliatory motives [2][4][3]
Musk's counsel focused on alleged breach of trust and character attacks. In May 2026, during the closing arguments of the Musk v. OpenAI trial, Elon Musk's legal team, led by Steven Molo, centered their case on the contention that OpenAI's shift to a for-profit model constituted a breach of a charitable trust [1][2][3]. This trust, they argued, was initiated by Musk's $38 million donation [1][2][3]. A key aspect of their strategy involved character attacks against Sam Altman [1][2][3].
OpenAI countered, citing lack of evidence and Musk's personal motives. Conversely, OpenAI's counsel, Sarah Eddy, contended that Musk's lawsuit lacked supporting evidence [2][4][3]. Eddy's team maintained that Musk's donations were not conditional on OpenAI remaining a nonprofit organization [2][4][3]. They further argued that Musk's legal action was a retaliatory move, driven by his own aspirations to control Artificial General Intelligence (AGI) and his subsequent launch of a competing for-profit company, xAI [2][4][3].
Sources (4)
  1. 1Musk, Altman Make Final Pitches to Jury in Battle Over OpenAInews.bloomberglaw.com
  2. 2Musk vs. OpenAI lawyers' closing arguments hit on Musk's ambition, Altman's characterfinance.yahoo.com
  3. 3Closing arguments begin in Elon Musk’s landmark lawsuit against OpenAI | Elon Musk News | Al Jazeeraaljazeera.com
  4. 4OpenAI closing arguments conclude in Musk vs. Altman trialyoutube.com

9. What evidence did OpenAI's defense team present during the trial to justify its transition to a for-profit model?

Nonprofit Equity Stake26% equity stake, valued at approximately $130 billion [1]
Transaction TypeRecapitalization transaction [1]
Lawsuit CharacterizationDescribed as 'baseless' harassment by the defense [2][3][4]
OpenAI defended its for-profit transition as a strategic recapitalization. The defense team asserted that the organizational shift was a recapitalization rather than a conversion, with the for-profit affiliate established as a public benefit corporation (PBC) while the original nonprofit retained control and its core mission [1]. Supporting evidence included agreements with state Attorneys General, which confirmed the nonprofit's mission primacy. These agreements also granted the nonprofit a 26% equity stake in the PBC, valued at approximately $130 billion, intended to further its charitable objectives [1].
The defense challenged Musk's claims, citing his own past discussions. During the trial, OpenAI's defense team countered Elon Musk's assertions by highlighting his prior discussions regarding the creation of a for-profit arm to attract capital [2][3][4]. The defense characterized Musk's lawsuit as a "baseless" harassment campaign, attributing it to ego and competitive motivations. Furthermore, the defense noted that no witnesses provided testimony confirming a binding commitment made to Musk [2][3][4].
Sources (4)
  1. 1https://storage.courtlistener.com/recap/gov.uscourts.cand.433688/gov.uscourts.cand.433688.422.0.pdfstorage.courtlistener.com
  2. 2Live updates: OpenAI trial to hear closing arguments Thursday | KTVU FOX 2ktvu.com
  3. 3OpenAI lawsuit updates: Elon Musk v. Sam Altman trial day 2cnbc.com
  4. 4Elon Musk’s odds of winning lawsuit against OpenAI are slim, Kalshi traders saycnbc.com

10. What Could Change the Odds

Key Catalysts

As of May 16, 2026, the trial between Elon Musk and OpenAI has concluded its presentation of evidence and closing arguments, with the jury set to begin deliberations on Monday, May 18, 2026. The final verdict and any remedies will be determined by U.S. District Judge Yvonne Gonzalez Rogers, who is not bound by the jury's findings [1][2][3].
Prediction markets have turned increasingly bearish on Musk's chances of winning, with implied probabilities of a victory falling from near 60% at the start of the trial to approximately 32%–40% by mid-May 2026 [4][5][6][7]. Musk is seeking up to $150 billion in damages (to be awarded to OpenAI's nonprofit arm), the removal of Sam Altman and Greg Brockman from their leadership roles, and an order to unwind OpenAI's conversion to a for-profit entity [1][8][9]. Legal experts consider an order to reverse the restructuring unlikely given prior approvals by state attorneys general [9].
Analysts suggest that even if Musk loses the legal case, he may achieve a strategic victory if the trial's evidence prompts state attorneys general to re-examine their approval of OpenAI's for-profit transformation or creates significant reputational damage to the company ahead of a potential IPO [9][10].

Key Dates & Catalysts

  • Expiration: January 01, 2027
  • Closes: January 01, 2027
Sources (10)
  1. 1Musk, Altman Make Final Pitches to Jury in Battle Over OpenAInews.bloomberglaw.com
  2. 2What the jury will actually decide in the case of Elon Musk vs. Sam Altmantechcrunch.com
  3. 3Musk vs Altman enters final stage as jury begins deliberations in blockbuster OpenAI trialfinancialexpress.com
  4. 4Will Elon Musk Win His OpenAI Lawsuit? Prediction Markets Say Only 32% Chanceainvest.com
  5. 5Elon Musk odds low to win OpenAI suitcnbc.com
  6. 6Elon Musk Court Case Odds: Will Musk Win Lawsuit Against Sam Altman, Open AI in 2026?oddschecker.com
  7. 7Elon Musk vs. OpenAI case: Prediction markets turn bearish on Muskmsn.com
  8. 8Elon Musk vs Sam Altman: OpenAI courtroom battle heads toward dramatic finishindianexpress.com
  9. 9Elon Musk could lose his legal case against OpenAI and still get most of what he wants. | Voxvox.com
  10. 10Musk could beat OpenAI even if he loses case, experts sayeuropesays.com

12. Related News

-13.0pp
Last updated: May 16, 2026, 12:21 UTC

Musk's Odds of Winning OpenAI Lawsuit Fall as Case Goes to Jury

The prediction market for Elon Musk's lawsuit against OpenAI repriced significantly on Friday, May 15, 2026, as the high-profile trial concluded its testimony phase. The market-implied probability of ...