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Will Open AI or Anthropic IPO first?

KXOAIANTH-40-ANTH · Financials · 2026-04-03
59%
Multi-Step
63%
Market Price
-4.0%
Edge
50%
Confidence
Final Rationale
My corrected independent estimate of 53.5% (fixing the double-counting rounding error) reflects both companies being near-certain to IPO within 14 years, with Anthropic having a modest edge from its simpler PBC structure, specific Q4 2026 target, and engaged IPO counsel. The Devil's Advocate correctly identified the double-counting issue and insufficient deference to prediction markets, pushing me upward. I remain below the market's 65% because the extremely wide $0.97 spread undermines confidence in that price, and OpenAI's prospectus-like documents and massive scale could enable rapid execution once its restructuring completes — though I acknowledge the restructuring itself is a meaningful delay risk that the market may be pricing more aggressively than I initially did.
What Would Change My Mind
OpenAI announcing completion of its for-profit restructuring and filing an S-1 would push this below 40%. Conversely, Anthropic formally filing its S-1 or selecting underwriters would push this above 75%. An AI market downturn delaying both IPOs past 2028 would push toward 50% as timing advantages compress.
1. Planning Agent Sonnet
binary economics article_search web_search kalshi_data kalshi_orderbook
Sub-questions
IDQuestionWeight
sq1 Will Anthropic IPO before January 1, 2040? 40%
sq2 Will OpenAI IPO before January 1, 2040? 20%
sq3 Will Anthropic IPO before OpenAI does (conditional on both eventually IPOing)? 40%
Reasoning Approach
This question asks whether Anthropic will IPO BEFORE OpenAI — it resolves YES if Anthropic confirms an IPO first before Jan 1, 2040. The key analytical frames are: (1) Current IPO readiness and stated intentions of each company: OpenAI has been restructuring toward a for-profit PBC model which could facilitate an IPO, while Anthropic has been raising large private rounds (Amazon, Google). (2) Corporate structure constraints: OpenAI's complex capped-profit structure is undergoing conversion; Anthropic's PBC structure may be simpler to IPO. (3) Revenue and valuation trajectories — whichever company achieves profitability or market leadership may IPO first to capitalize on momentum. (4) Competitive dynamics: if one company goes public, the other faces pressure to follow but may have already lost the 'first mover' advantage. (5) The 14-year time horizon makes it highly likely BOTH will IPO eventually, so this question really reduces to the ORDER. The race-to-IPO framing means we should assess relative investor pressure, cash burn rates, employee liquidity demands, and strategic timing. OpenAI has been more publicly discussed as an IPO candidate and has a larger revenue base, but Anthropic has cleaner governance potentially. Key differentiator: OpenAI's for-profit restructuring timeline vs Anthropic's fundraising strategy.
2. Research Execution No LLM
ToolStatusTime
article_search OK 0.57s
web_search OK 54.37s
kalshi_data OK 2.27s
kalshi_orderbook OK 0.08s
3. Evidence Synthesis Sonnet · 20 items
#StrengthDirectionSourceClaimPriced In
1 MODERATE ↑ UP web_search Anthropic is reportedly considering going public as soon as Q4 2026 (October), with bankers expecting a raise exceeding $60 billion, potentially the second-biggest IPO ever. No
2 MODERATE ↑ UP web_search Anthropic has engaged Wilson Sonsini as lead IPO counsel and held preliminary discussions with Goldman Sachs, JPMorgan Chase, and Morgan Stanley about lead IPO roles, signaling active preparation. No
3 STRONG ↑ UP web_search Anthropic closed a $30 billion funding round at a $380 billion valuation in February 2026 (Series G led by GIC), and annualized revenue surpassed $19 billion as of March 2026, up from $9 billion at end of 2025. Yes
4 MODERATE — NEUTRAL web_search Anthropic's spokesperson stated the company 'has not decided when or even if it will go public,' a standard legal caution typical of companies in early IPO discussions. Yes
5 WEAK ↓ DOWN web_search The SEC may require Anthropic to change how it reports cloud computing credits as revenue, which could materially affect its headline financial figures and IPO valuation. No
6 STRONG — NEUTRAL article_search The Pentagon blacklisted Anthropic as a supply chain risk in late February 2026, restricting it from government contracts; however, a federal judge blocked this designation on March 26, 2026. Yes
7 MODERATE ↑ UP article_search Anthropic gained significant public popularity and consumer goodwill following the Pentagon dispute, with surging app downloads and subscriptions for Claude. Yes
8 WEAK ↑ UP kalshi_data Kalshi market for 'Anthropic IPO before Jan 1, 2027' is priced at 61%, with very recent data (1 data point only), suggesting market participants view a near-term IPO as more likely than not. No
9 STRONG ↑ UP article_search OpenAI shared a document resembling an IPO prospectus with prospective investors in March 2026, including risk factor sections, ahead of a $110 billion financing round. Yes
10 MODERATE ↑ UP article_search Multiple CNBC/Bloomberg articles from March 2026 describe OpenAI as preparing for an expected IPO, with data center spending and Microsoft dependency flagged as risks in investor documents. Yes
11 MODERATE ↑ UP kalshi_data Kalshi market for 'OpenAI IPO announcement before Jan 1, 2027' is priced at 54%, with moderate volume (239 avg daily contracts), indicating significant market uncertainty about near-term timing. Yes
12 STRONG ↑ UP article_search OpenAI secured a Pentagon deal immediately after Anthropic was banned, and announced $110 billion in new funding from Amazon, Nvidia, and strategic partners, demonstrating strong government and investor relationships. Yes
13 MODERATE ↓ DOWN article_search OpenAI is navigating complex corporate restructuring toward a for-profit PBC model, and its prospectus-like document highlighted Microsoft dependency as a risk, potentially complicating IPO timeline. Yes
14 MODERATE ↑ UP web_search Anthropic is targeting a Q4 2026 IPO (potentially October), while OpenAI's IPO timeline is less precisely specified but also imminent, placing Anthropic potentially ahead in near-term IPO timing. No
15 WEAK ↑ UP web_search Kalshi betting platform shows Anthropic at 72% probability to IPO before OpenAI, as cited by web search summary. No
16 MODERATE ↑ UP kalshi_data The primary Kalshi market (KXOAIANTH-40-ANTH) for 'Anthropic IPOs first' is priced at 65%, up +14% over 30 days and +3% over 7 days, with 142 data points and average daily volume of 362 contracts. Yes
17 WEAK — NEUTRAL kalshi_orderbook The orderbook for KXOAIANTH-40-ANTH shows very high depth (8848) and HIGH liquidity, but an extremely wide spread ($0.01 yes_bid vs $0.02 no_bid, $0.97 spread), suggesting the market may have thin active trading despite the depth statistic. Yes
18 MODERATE ↑ UP article_search Anthropic has a structurally simpler PBC corporate form compared to OpenAI's complex capped-profit-to-PBC conversion underway, potentially giving Anthropic a governance/regulatory advantage in IPO speed. Yes
19 STRONG ↓ DOWN article_search OpenAI's prospectus-like investor document and $110B funding round in early 2026 signal it is also actively preparing for an IPO, making the ordering question genuinely competitive. Yes
20 WEAK ↑ UP web_search Anthropic generates $0.23 in annual recurring revenue per dollar raised, reportedly double OpenAI's ratio, suggesting Anthropic may have a stronger relative profitability case for IPO readiness. No
Information Gaps
  • No confirmed official S-1 or formal SEC filing from either Anthropic or OpenAI — all IPO signals are preparatory/preliminary
  • Lack of detail on OpenAI's for-profit restructuring completion timeline and whether it has resolved Microsoft's consent requirements for IPO
  • No direct statements from Anthropic leadership confirming or denying IPO timeline specifics beyond the generic 'has not decided' denial
  • Unclear whether Anthropic's revenue recognition issue with cloud computing credits will be resolved before a filing, and to what degree it would affect valuation
  • No data on employee liquidity pressure at either company (option expiry dates, secondary market demand), which could accelerate one company's IPO
  • Outcome of Anthropic's lawsuit against the U.S. government is still pending beyond the preliminary injunction — final resolution could affect Anthropic's government revenue prospects and IPO narrative
  • No information on whether OpenAI has formally engaged IPO underwriters with specific mandates vs. Anthropic's confirmed early-stage bank discussions
  • Market conditions in late 2026 and beyond are unknown — macroeconomic or regulatory shocks could delay either company's IPO
Key Uncertainties
  • Whether OpenAI completes its PBC restructuring and resolves Microsoft's investment terms in time to IPO before Anthropic's targeted Q4 2026 window
  • Whether the Pentagon/government dispute creates lasting reputational or financial damage to Anthropic that delays or derails its IPO plans
  • Whether SEC accounting scrutiny of Anthropic's revenue recognition creates a material obstacle to filing
  • The actual timing gap between the two companies — if both are targeting late 2026, small execution differences could flip the order
  • Whether either company opts for a direct listing, SPAC, or traditional IPO, which could affect relative speed
  • Long-term structural risk: over a 14-year horizon, either company could be acquired, fail, or merge, making the question moot
Market Context
Price: 0.65 · 7d: +0.03 · 30d: +0.14
Volume: MODERATE — 362 avg daily contracts over 142 days is reasonable but not high for a major question · Depth: HIGH depth (8848) but extremely wide spread ($0.97), suggesting depth stat may reflect stale resting orders rather than active two-sided market
Reliability: MEDIUM — sustained price trend and moderate volume lend credibility, but wide spread and single-day data for the Jan 2027 Anthropic market reduce confidence; the 72% figure cited in web search differs from the 65% primary market, suggesting some inconsistency across platforms
4. Independent Forecaster Opus · No market price Did NOT see market price
Independent estimate: 55% (medium confidence)
sq1: Will Anthropic IPO before January 1, 2040?
92%
Base rate: Major AI companies with $19B+ ARR, $380B valuation, and active IPO preparations (engaged counsel, banker discussions) have an extremely high probability of eventually going public over a 14-year window. Historical base rate for unicorns at this stage IPOing within 5 years is ~70-80%; over 14 years it's much higher. Evidence pushing UP: Anthropic has engaged Wilson Sonsini as IPO counsel, held discussions with Goldman/JPMorgan/Morgan Stanley, targeting Q4 2026 (~+10%). $19B ARR and $380B valuation make it one of the most valuable private companies ever (~+5%). Evidence pushing DOWN: SEC revenue recognition concerns could delay but unlikely prevent (~-2%). Pentagon blacklisting was reversed by court (~-1%). Standard 'has not decided' language is boilerplate (~0%). The 14-year horizon makes this very likely barring acquisition or company failure. Small probability of acquisition by Amazon/Google (~5%) or catastrophic failure (~3%) prevents this from being higher. Final: 92%.
sq2: Will OpenAI IPO before January 1, 2040?
93%
Base rate: Similar to Anthropic — OpenAI is the most valuable private company in the world with even larger revenue, and has shared prospectus-like documents with investors. Over 14 years, extremely likely to IPO. Evidence pushing UP: Prospectus-like document shared with investors in March 2026 (~+8%). $110B funding round with major strategic partners (~+3%). Pentagon deal shows government revenue pipeline (~+2%). Evidence pushing DOWN: Complex PBC restructuring and Microsoft dependency could delay (~-3%). However, delay ≠ prevention over 14 years. Risk of acquisition is lower than Anthropic's (OpenAI is larger and more independent). Risk of failure exists but is small given current trajectory. Final: 93%.
sq3: Will Anthropic IPO before OpenAI does (conditional on both eventually IPOing)?
55%
Base rate: With two companies both preparing for IPOs in similar timeframes, the prior is roughly 50/50. Evidence pushing UP for Anthropic going first: Anthropic has a more specific target (Q4 2026) vs OpenAI's less defined timeline (~+5%). Simpler PBC corporate structure vs OpenAI's complex restructuring (~+5%). Engaged specific IPO counsel and banks (~+3%). Better revenue efficiency ratio (~+1%). Kalshi shows 72% but I discount prediction market prices somewhat as they can overshoot on momentum. Evidence pushing DOWN (favoring OpenAI going first): OpenAI has already shared prospectus-like documents, which is a more advanced step than engaging counsel (~-5%). OpenAI's $110B round and larger revenue base suggest it could move quickly (~-3%). OpenAI has stronger government relationships post-Pentagon deal (~-1%). Key uncertainty: Both are targeting roughly the same window (late 2026), so small execution differences matter enormously. OpenAI's restructuring complexity is the biggest factor favoring Anthropic. But OpenAI's prospectus document suggests they may be further along than surface-level analysis suggests. The SEC revenue recognition issue for Anthropic could cause delays. Net assessment: Anthropic has a modest edge due to structural simplicity and more specific timeline, but it's genuinely close. Final: 55%.
Show full reasoning trace
base rate: Both companies are among the most valuable private companies globally with multi-billion dollar revenues. Historical base rate for companies at this stage IPOing within 14 years is >90%. The question reduces to ordering: which goes first?
evidence updates: Anthropic has more specific IPO timing (Q4 2026 target), simpler corporate structure, and engaged IPO counsel/banks. OpenAI has shared prospectus-like documents and completed massive funding round, but faces complex restructuring. Net effect: Anthropic has a modest ~55% chance of going first.
combination method: Conditional probability: P(both IPO) * P(Anthropic first | both) + P(only Anthropic IPOs) = 0.856 * 0.55 + 0.064 = 0.535, rounded to 0.55 given strong recent evidence of Anthropic's IPO preparations.
final: Anthropic has a slight edge in the IPO race due to simpler corporate structure and more specific timeline targeting, but OpenAI is also actively preparing. The probability that Anthropic IPOs first is modestly above 50%. Over the 14-year horizon, both almost certainly go public, making this primarily an ordering question. Final estimate: 55%.
5. Devil's Advocate Sonnet Market price revealed
Math Error Asymmetric Evidence Reasoning Flaw
Challenges
  1. The combination formula has a mathematical issue. The forecaster writes P(both IPO) * P(Anthropic first | both) + P(only Anthropic IPOs) = 0.856 * 0.55 + 0.064 = 0.535. Let's check: P(both IPO) = P(Anthropic IPOs) * P(OpenAI IPOs) = 0.92 * 0.93 = 0.8556. P(only Anthropic IPOs) = P(Anthropic IPOs) * P(OpenAI doesn't IPO) = 0.92 * 0.07 = 0.0644. So 0.8556 * 0.55 + 0.0644 = 0.4706 + 0.0644 = 0.535. The math checks out, but the forecaster then rounds this to 0.55, which is a non-trivial upward adjustment of 1.5 percentage points justified only by 'strong recent evidence of Anthropic's IPO preparations' — evidence that should already be baked into the sub-question estimates. This is double-counting evidence.
  2. The sub-question P(Anthropic first | both IPO) = 55% may underweight the significance of OpenAI's prospectus-like document. Sharing a prospectus-like document with investors is arguably a more advanced IPO preparation step than engaging counsel and having preliminary bank discussions. The forecaster acknowledges this but seems to give roughly equal weight to both sides when the prospectus document is arguably a stronger signal of imminent IPO readiness.
  3. The forecaster treats P(Anthropic IPOs) and P(OpenAI IPOs) as independent events, but they are correlated. Both are affected by: (1) AI market conditions, (2) regulatory environment, (3) IPO market windows, (4) potential AI winter. If one company's IPO is blocked by market conditions, the other likely faces similar headwinds. This correlation means the probability of 'both IPO' should be somewhat lower and 'neither IPOs' somewhat higher than the independent calculation suggests — though over 14 years, this effect is modest.
  4. The 55% estimate for Anthropic going first seems to insufficiently account for the resolution criteria. The question asks which company 'IPOs first' — not which announces first or files first. Even if Anthropic files first, OpenAI could potentially leapfrog if it moves faster through the process. The forecaster focuses heavily on preparation signals rather than considering execution speed differences.
  5. The forecaster discounts the Kalshi market showing 72% for Anthropic going first, noting prediction markets 'can overshoot on momentum.' However, the primary Kalshi market (65%) has HIGH depth and moderate volume, and the 30-day trend of +14% suggests sustained directional movement rather than a momentum spike. The forecaster doesn't provide a strong reason to believe the market is specifically wrong here — only a general skepticism toward prediction markets.
  6. There's an asymmetric treatment of the 'has not decided' statement from Anthropic (dismissed as boilerplate) versus OpenAI's prospectus document (treated as strong evidence). Both are strategic communications that could be misleading. The prospectus-like document could be primarily for the $110B funding round rather than signaling an imminent IPO — several sources note it was shared with 'prospective investors' in the context of fundraising, not IPO roadshow investors.
Suggested adjustment: +2pp
The double-counting of evidence in rounding from 0.535 to 0.55 is a clear reasoning flaw. However, the sub-question estimates themselves are reasonable, and the mathematical result of 0.535 is close to the stated 0.55. A slight upward adjustment from 0.55 is warranted because the forecaster may be underweighting the structural advantages Anthropic has (simpler corporate structure, more specific timeline, engaged counsel) relative to OpenAI's complex restructuring. The net effect is small — moving from 0.55 to 0.57 — acknowledging the forecaster's directional reasoning is sound but the magnitude may be slightly too conservative given the evidence balance.
Market comparison: Forecaster: 55%, Market: 65%. The 10-point divergence is notable. The forecaster has no genuinely new information that the market lacks — all cited evidence is from public sources. The market's 30-day upward trend of +14% with moderate volume suggests growing consensus toward Anthropic going first. However, the extremely wide spread ($0.97) on the orderbook undermines the reliability of the 65% price as a tight consensus. The divergence is partially justified by the forecaster's reasonable skepticism about prediction market momentum, but the forecaster doesn't provide a strong specific counter-argument for why the market is wrong.
6. Final Forecast Opus
59% (medium confidence)
My corrected independent estimate of 53.5% (fixing the double-counting rounding error) reflects both companies being near-certain to IPO within 14 years, with Anthropic having a modest edge from its simpler PBC structure, specific Q4 2026 target, and engaged IPO counsel. The Devil's Advocate correctly identified the double-counting issue and insufficient deference to prediction markets, pushing me upward. I remain below the market's 65% because the extremely wide $0.97 spread undermines confidence in that price, and OpenAI's prospectus-like documents and massive scale could enable rapid execution once its restructuring completes — though I acknowledge the restructuring itself is a meaningful delay risk that the market may be pricing more aggressively than I initially did.
Pipeline Timing
StepTime
Planning 15.5s
Research 54.37s
Synthesis 52.53s
Forecaster 35.06s
Critic 25.44s
Final 20.94s