Traders on Polymarket, the only major prediction platform tracking this event, see an 87% probability that OpenAI's market cap will land below $1.25 trillion at the close of its IPO day. The market has attracted $508,000 in volume, indicating moderate interest in the question, though no other platforms—such as Kalshi or Manifold—currently offer contracts on this specific outcome.
The 13% probability reflects a cautious outlook for the AI giant's public debut, which is not expected until at least mid-2026. While OpenAI has been a dominant force in generative AI, the high bar of a $1.25 trillion valuation—which would place it among the world's most valuable companies—appears to be a stretch in the eyes of forecasters. No specific external trigger, such as earnings reports or regulatory developments, was identified in today's news flow to explain the current odds.
Given the single-platform coverage, the data carries inherent limitations. Polymarket's volume is concentrated, and the lack of cross-platform comparison means the 13% figure should be interpreted as a directional signal rather than a consensus. Still, the market's clear tilt suggests that even with OpenAI's rapid growth, a blockbuster IPO valuation in the trillion-dollar range is not the base case.