Polymarket traders have set the valuation for OpenAI’s upcoming IPO at $875 billion. This valuation comes amid heightened investor interest in AI companies, particularly among leading model developers and infrastructure providers. Prediction markets like Polymarket are known for capturing speculative consensus around future corporate events, albeit influenced by various factors including rumors and sentiment.

OpenAI: OpenAI is an artificial intelligence company best known for developing widely used generative AI products and frontier models. In this news, it is the subject of IPO valuation speculation as market participants on Polymarket are pricing a very large public-market debut for the company.
Polymarket: Polymarket is a prediction market platform where users trade on the outcomes of real-world events. It is relevant here because traders on the platform are actively pricing expectations around OpenAI’s potential IPO valuation.

AI IPO appetite: Investor attention around AI companies has remained elevated, with public-market interest frequently clustering around the largest model developers and infrastructure providers.
Prediction markets: Prediction markets often reflect speculative consensus on future corporate events, but they can move quickly with rumor, sentiment, and limited hard disclosure.
IPO valuation signaling: A widely watched pre-IPO valuation signal can influence media narratives and expectations even before a company formally files for a listing.