Prediction markets are signaling skepticism about OpenAI's ability to achieve a blockbuster valuation in its highly anticipated IPO, expected by mid-2026. On Polymarket, the sole platform with active trading on this contract, forecasters see just an 18% chance that the company's market cap will settle between $1 trillion and $1.25 trillion on its first day of trading. This implies an 82% expectation that the valuation will fall below $1 trillion, reflecting caution among traders despite the company's prominent role in the generative AI boom.
The $208,000 in volume on Polymarket indicates modest but meaningful interest in the question, though the absence of data from Kalshi and Manifold limits cross-platform comparison. No specific external trigger was identified in today's news flow to explain the current odds, suggesting the probability reflects a baseline market consensus on the challenges of sustaining high valuations in a competitive and rapidly evolving industry. OpenAI faces mounting pressure from rivals like Google and Anthropic, as well as regulatory scrutiny, which may temper investor enthusiasm.
Traders are effectively betting that the hype around OpenAI's technology will not translate into a trillion-dollar valuation on day one, a stance that aligns with broader market trends where AI companies have seen volatile post-IPO performances. The 18% probability for the $1T–$1.25T range leaves room for upside surprises, but the current odds suggest a more conservative outlook prevails among those willing to put money on the line.