Will OpenAI or Anthropic IPO first?
Short Answer
Both the model and the market overwhelmingly agree that Anthropic is most likely to IPO first before 2040, with only minor residual uncertainty.
1. Executive Verdict
- Since last update (~78d): The model increased Anthropic's probability by +9.6pp, leading the market, as the edge flipped.
- OpenAI's market probability dropped -13.0pp, driving the model, with the edge compressing.
- Overall model probability decreased by -12.4pp, and the model-market edge compressed slightly.
- Anthropic targets an October 2026 IPO, backed by a June 1, 2026 S-1 filing.
- Anthropic reported operating profit in Q2 2026, positioning for earlier market entry.
- OpenAI may delay its IPO until 2027 for a $1 trillion valuation.
Who Wins and Why
| Outcome | Market | Model | Why |
|---|---|---|---|
| Anthropic | 83.0% | 89.6% | The evidence overwhelmingly supports Anthropic IPOing first, as they are reportedly targeting an IPO as early as October 2026 with a higher private valuation and more favorable path to profitability, while OpenAI is leaning toward delaying its IPO until 2027 due to valuation demands and market volatility. |
| OpenAI | 18.0% | 6.2% | The evidence strongly indicates Anthropic is expected to IPO first by October 2026, with OpenAI reportedly delaying until 2027 due to valuation targets and market volatility, pushing the probability of OpenAI IPOing first significantly lower; however, IPO timelines are fluid, and unexpected shifts could still lead to OpenAI IPOing earlier or Anthropic later. |
Current Context
Anthropic is positioned to IPO ahead of OpenAI. Anthropic is widely expected to debut on public markets first, with recent reports indicating the company is scheduling investor meetings and targeting a potential listing as early as October 2026 [^][^][^]. OpenAI, by contrast, leans toward delaying its IPO until 2027. This delay is attributed primarily to CEO Sam Altman’s reported insistence on a $1 trillion valuation target and market volatility following the SpaceX IPO [^][^][^][^]. Prediction markets and industry observers heavily favor Anthropic to list first, with some estimates placing this probability at over 70% [^][^][^][^]. OpenAI’s 2026 IPO chances, which were 75% last month (June 2026), have since dropped [^].
Anthropic holds a higher private valuation with stronger growth. As of August 2026, Anthropic’s private valuation is approximately $965 billion, surpassing OpenAI’s $852 billion [^][^][^][^]. Anthropic reportedly shows faster growth and a more favorable path to operating profitability [^][^][^][^]. The company, which remains private and has not publicly confirmed an IPO date as of 2026, reported a run-rate revenue exceeding $30 billion by April 6, 2026 [^][^][^]. Both OpenAI and Anthropic are widely regarded as "mega-IPOs" expected in the near future, influencing major index providers to adjust rules for potential index inclusion by June 2026 [^]. This suggests market observers consider these listings imminent [^].
2. Market Behavior & Price Dynamics
Historical Price (Probability)
Outcome probability
Date
This market, which asks if OpenAI will IPO before Anthropic, has traded in a stable, sideways pattern. The contract price for "YES" (OpenAI) has remained within a narrow 10-point band, between 15% and 25%. It opened at 20% and currently trades near the bottom of its range at 18%. The most significant movement was a brief rise to 25% around July 28, which was quickly followed by a retreat to 18% by August 4. The price action suggests a clear resistance level at 25% and a potential support level near 15%.
The low probability assigned to an OpenAI-first IPO is consistent with recent news. Reports indicate Anthropic is targeting a public listing as early as October 2026, while OpenAI's CEO is reportedly aiming for a 2027 debut at a higher valuation. This timeline differential strongly favors Anthropic, explaining the contract's persistently low price. The brief spike to 25% on July 28 lacks a clear catalyst in the provided information and was not sustained, suggesting it was either a short-lived reaction to other information or a low-conviction move that the market corrected. The subsequent price drop back to the lower end of the range realigned the market with the dominant news narrative.
Total volume is moderate at 7,761 contracts. The volume of 191 contracts traded during the move to 25% indicates some capital was deployed behind that peak, but the subsequent fade on low volume suggests a lack of broad follow-through. Overall, the chart indicates a strong and stable market consensus. Traders have consistently priced in a low probability of OpenAI winning the race to an IPO, aligning with public reports that position Anthropic as the likely first mover. The current 18% price reflects the market's view that an OpenAI-first IPO is an unlikely outcome.
3. Market Data
Contract Snapshot
Based on the provided content, the exact triggers for a YES or NO resolution are not explicitly detailed. The market asks which company, OpenAI or Anthropic, will IPO first. The maximum payout date for this market is December 31, 2039. No special settlement conditions are mentioned in the provided text.
Available Contracts
Market options and current pricing
| Outcome bucket | Yes (price) | No (price) | Last trade probability |
|---|---|---|---|
| Anthropic | $0.83 | $0.18 | 83% |
| OpenAI | $0.20 | $0.82 | 18% |
Market Discussion
As of August 2026, prediction markets strongly favor Anthropic to conduct its initial public offering (IPO) before OpenAI, with Anthropic confidentially filing for an IPO on June 1, 2026, and reportedly targeting an October 2026 listing window, while OpenAI leans toward delaying its IPO until 2027 [^][^][^]. This sentiment is driven by Anthropic's perceived more credible path to profitability and higher private-market valuation compared to OpenAI, which faces significantly higher projected losses and complex legacy structure questions [^][^]. Both companies are identified as "megaIPOs" and are actively anticipated by the market as of June 2026, though social media commentary reflects widespread skepticism about the sustainability of their business models [^][^][^][^].
4. How do Anthropic's and OpenAI's paths to profitability and revenue growth compare heading into their potential IPO windows?
| Anthropic Profitability | Operating profit in Q2 2026 [^][^][^][^][^] |
|---|---|
| Anthropic Enterprise Revenue | Approximately 80% of total revenue [^][^][^][^][^] |
| OpenAI Projected Breakeven | 2030 or later [^][^][^][^] |
Anthropic demonstrates a clearer path to near-term profitability than OpenAI. Anthropic reported an operating profit in Q2 2026, unlike OpenAI, which remains significantly unprofitable [^][^][^][^][^]. Anthropic's revenue model heavily relies on enterprise solutions, generating approximately 80% of its total revenue from business clients and products like Claude Code [^][^][^]. This contrasts with OpenAI's approach, which is more dependent on consumer subscriptions and targets a broader, albeit less monetized, active user base [^][^][^][^]. This strategic difference positions Anthropic for a much earlier projected breakeven date, whereas OpenAI is not anticipated to achieve profitability until 2030 or potentially later [^][^][^][^].
Anthropic appears positioned for an earlier IPO than OpenAI. Both companies have confidentially submitted filings for initial public offerings [^]. However, as of mid-2026, OpenAI is reportedly reconsidering the aggressiveness of its near-term IPO plans, influenced by prevailing market conditions and internal discussions, potentially leading to a delay until next year [^][^][^]. Conversely, Anthropic is viewed as progressing toward a sooner public offering, with prediction markets consistently indicating that Anthropic will list before OpenAI [^][^][^][^].
5. What specific actions and reports support the consensus that Anthropic is targeting an IPO as early as October 2026?
| Anthropic IPO Target | October 2026 [^][^][^][^] |
|---|---|
| Anthropic S-1 Filing | June 2026 [^][^][^][^] |
| OpenAI Revised IPO Target | 2027 [^][^][^] |
Anthropic is targeting an Initial Public Offering as early as October 2026. This timeline is supported by concrete actions, including scheduled investor meetings with major financial institutions such as Goldman Sachs, Morgan Stanley, and JPMorgan Chase. Furthermore, the company confidentially filed an S-1 prospectus with the SEC in June 2026, signaling a clear progression toward a public offering [^][^][^][^].
Market consensus indicates Anthropic leads OpenAI in the IPO process. While Anthropic aims for a 2026 debut, OpenAI is reportedly now looking towards a 2027 debut, having previously targeted late 2026 [^][^][^]. This perceived lead is further corroborated by prediction markets, including Polymarket and Coinbase, which track the "Will OpenAI or Anthropic IPO first?" question and frequently reflect significant market conviction favoring Anthropic [^][^].
6. What role does CEO Sam Altman’s reported $1 trillion valuation target play in OpenAI’s IPO timeline?
| Minimum IPO Valuation Target | $1 trillion [^][^][^][^] |
|---|---|
| Reported IPO Delay Target | 2027 [^][^][^][^] |
| Anthropic's Likelihood of Earlier IPO | 75-80% [^][^][^][^][^][^] |
OpenAI may delay its IPO until 2027 due to valuation targets. CEO Sam Altman is reportedly insisting on a minimum IPO valuation of $1 trillion, which is the primary driver for a potential delay in the company's public debut [^][^][^][^]. Altman has reportedly rejected a 2026 IPO if it would mean accepting a lower valuation, with advisors suggesting a 2027 delay as an alternative to meet this target [^][^][^][^]. While OpenAI confidentially filed for an IPO with the SEC on June 8, 2026, the company has publicly stated that no specific timeline has been finalized [^][^].
Market predictions indicate Anthropic is likely to IPO before OpenAI. This reported delay, tied to the ambitious $1 trillion valuation target, correlates with a decreased likelihood for OpenAI to go public in 2026 [^]. As of August 2026, prediction markets reflect this potential postponement, with rival company Anthropic overwhelmingly favored to complete its IPO before OpenAI [^][^][^][^][^][^]. These markets consistently show Anthropic's implied probability of an earlier debut polling above 75-80% [^][^][^][^][^][^].
7. How does the performance of the SpaceX IPO influence the IPO strategy and timing for OpenAI?
| SpaceX Initial Market Valuation | Over $2 trillion on first day of trading [^][^][^][^] |
|---|---|
| SpaceX Stock Performance Post-IPO | Down 24% since IPO [^][^] |
| OpenAI Target IPO Year | 2027 [^][^] |
SpaceX's significant IPO debut was followed by stock volatility. SpaceX completed the largest IPO in history on June 12, 2026, raising over $85 billion and achieving a market valuation exceeding $2 trillion on its first day of trading [^][^][^][^]. However, its post-IPO stock performance has been volatile, with shares currently down about 24% since the IPO [^][^]. This performance directly influenced OpenAI's decision to delay its own public offering [^].
OpenAI has delayed its IPO, impacting market expectations. OpenAI is now reportedly leaning toward a 2027 listing, as its CEO aims to avoid going public below a $1 trillion valuation threshold [^][^]. This revised timeline for OpenAI has shifted industry expectations, with prediction markets now heavily favoring Anthropic to complete its IPO first [^][^]. Anthropic is targeting an IPO in October 2026, having confidentially filed its S-1 on June 1, 2026, and is widely expected to go public before the end of 2026 [^][^][^][^].
8. How does the investor composition of Anthropic versus OpenAI create different pressures or timelines for a public offering?
| Anthropic IPO Filing | June 1, 2026 [^] |
|---|---|
| OpenAI IPO Filing | June 8, 2026 [^] |
| OpenAI Infrastructure Commitment | Over $600 billion through 2030 [^] |
Anthropic targets an October 2026 IPO, prioritizing a first-mover advantage. Despite a significant overlap in their investor bases, including shared venture capitalists and hedge funds [^], [^], Anthropic and OpenAI face distinct pressures influencing their public offering timelines [^]. Anthropic is actively pursuing an IPO with a target date of October 2026, having confidentially filed on June 1, 2026 [^], [^]. This strategy aims to secure a first-mover pricing advantage in the market [^], [^]. Prediction markets currently indicate Anthropic is more likely to go public first, reflecting the reported divergence in listing timelines observed after both companies' confidential filings in June 2026 [^], [^], [^].
OpenAI's 2027 IPO timeline addresses high capital needs and valuation goals. In contrast, OpenAI, which confidentially filed its intentions on June 8, 2026, is reportedly leaning towards a 2027 timeline for its public offering [^]. The company is under considerable pressure due to its substantial capital burn and massive infrastructure commitments, which are projected to exceed $600 billion through 2030 [^]. This delayed timeline is a deliberate strategic effort to ensure the company can meet its ambitious valuation targets, including Sam Altman's stated $1 trillion floor, and to address concerns about market volatility [^], [^]. Therefore, the delay is not indicative of a lack of capital need but rather a calculated move to achieve optimal market conditions and valuation [^], [^].
9. What Could Change the Odds
Key Catalysts
Anthropic is positioned for an initial public offering (IPO) with target dates in October 2026, supported by an active, advanced investor meeting schedule and a June 1, 2026, confidential S-1 filing [^] [^] [^] . Prediction markets like Kalshi and Polymarket show high conviction over 70-80% that Anthropic will complete its IPO in 2026 [^][^][^]. The company reported approximately $47 billion in annualized revenue as of May 2026, with significant enterprise growth [^][^][^]. This revenue trajectory followed a run-rate of $14 billion in February 2026, surging to over $30 billion by April 2026, with an 80% enterprise customer base [^][^].
OpenAI has signaled a likely delay of its IPO until 2027, prioritizing a $1 trillion valuation threshold and citing market volatility as a major factor for not proceeding in 2026 [^] [^] [^] . Betting on OpenAI in prediction markets has shifted toward 2027 [^][^][^]. This positions Anthropic with a distinct financial profile compared to OpenAI's consumer-focused model [^][^][^].
As of June 25, 2026, major index providers adjusted rules to fast-track inclusion of recently-public, large companies in anticipation of upcoming mega-IPOs, specifically citing Anthropic and OpenAI [^] . Current market expectations, as reflected in testimony before the U.S. House of Representatives, indicate that both OpenAI and Anthropic are expected to conduct initial public offerings in the coming months following June 2026 [^].
Key Dates & Catalysts
- Expiration: January 08, 2040
- Closes: January 01, 2040
10. Decision-Flipping Events
- Trigger: Anthropic is positioned for an initial public offering (IPO) with target dates in October 2026, supported by an active, advanced investor meeting schedule and a June 1, 2026, confidential S-1 filing [^] [^] [^] .
- Trigger: Prediction markets like Kalshi and Polymarket show high conviction over 70-80% that Anthropic will complete its IPO in 2026 [^] [^] [^] .
- Trigger: The company reported approximately $47 billion in annualized revenue as of May 2026, with significant enterprise growth [^] [^] [^] .
- Trigger: This revenue trajectory followed a run-rate of $14 billion in February 2026, surging to over $30 billion by April 2026, with an 80% enterprise customer base [^] [^] .
12. Historical Resolutions
No historical resolution data available for this series.
