Will OpenAI or Anthropic IPO first?

**Stage 1 — Blind analysis (ignore market prices):**

OpenAI appears materially more likely to be the first of the two to go public. Public reporting has described concrete restructuring discussions at OpenAI that would facilitate an S‑1 and public-company governance, and OpenAI already has significant commercial product traction and enterprise revenue that give it a narrative and financial basis to justify an IPO. Anthropic, by contrast, has emphasized private fundraising and been less visible about IPO mechanics; it looks comfortable staying private longer and has not signaled comparable structural changes. Key frictions that could delay OpenAI include its unusual corporate structure, mission-preserving ownership constraints, and heightened regulatory/PR scrutiny; those are real but manageable given sufficient board/major investor incentives.

On balance of probabilities, weighing: (a) public signaling and restructuring activity at OpenAI, (b) its commercial revenue and strategic partner incentives to accelerate liquidity, and (c) Anthropic's current emphasis on private financing, I put the independent probability that OpenAI will IPO before Anthropic at 70%.

**Stage 2 — Market calibration (take prices into account):**

The market current price (Yes: 0.24, No: 0.76) implies a strong consensus that OpenAI will *not* IPO first (or that Anthropic will). That is materially lower than my independent 70% estimate. Several plausible reasons explain the gap and suggest the market may be mispricing the event:

- Ambiguity in the market question or labeling. If traders interpret "Yes" differently (e.g., as "Anthropic will IPO first" or as "either will IPO before 2040"), liquidity could be concentrated on the side reflecting that reading. Misreadings often push prices away from fundamentals. - Risk aversion and emphasis on structural risk. Market participants may overweight OpenAI's governance complexity and regulatory attention as potentially insurmountable or long‑lasting, causing them to favor Anthropic or assume OpenAI stalls indefinitely. That inflates the No price relative to objective readiness signals. - Asymmetric private information. Sophisticated insiders (investors, employees) who believe Anthropic has secret plans to move earlier could be shorting the consensus; if that were true we'd expect sustained volume, but the market volume listed is moderate — not decisive evidence of informed flow. - Crowd behavior and anchoring on headlines. Since Anthropic has taken visible private raises, traders may anchor on the narrative that Anthropic prefers long private runs, reversing logic into "if Remote OR private, then Anthropic stays private but may still pivot to earlier IPO," creating noisy positioning.

Given these explanations, I conclude the market price at 24% is likely too low for OpenAI-first probability unless: (a) there is reliable private information that Anthropic will in fact accelerate, or (b) the market question was systematically misread. If neither is true, the market offers an attractive buying opportunity for the "OpenAI first" side.

(Where I diverge from the market: I view OpenAI's operational and investor incentives to list relatively high and concrete; the market appears to overweight governance/regulatory friction and/or suffers from question ambiguity.)