Will OpenAI have the best AI model at the end of April 2026?
Prediction markets currently give a 19% probability that Will OpenAI have the best AI model at the end of April 2026?. This contract trades at 19¢ on Polymarket, closing April 30, 2026. OpenAI's 3¢ price reflects extreme skepticism about maintaining top Chatbot Arena ranking by end-April 2026, despite the company's historical dominance—the 63,881% implied yield on YES positions signals severe mispricing risk if the market underestimates OpenAI's continued R&D advantage or overweights competitor momentum.
Analysis
OpenAI's 3¢ price reflects extreme skepticism about maintaining top Chatbot Arena ranking by end-April 2026, despite the company's historical dominance—the 63,881% implied yield on YES positions signals severe mispricing risk if the market underestimates OpenAI's continued R&D advantage or overweights competitor momentum. With only 14 days to resolution and $23.7M in 24-hour volume against $29.8M open interest, the market shows healthy liquidity, though the 1,714% realized volatility and elevated Cliff Risk Index (24) suggest recent sharp repricing that may reflect new model releases or benchmark shifts from competitors like Anthropic or DeepSeek. The flat 7-day price action (holding at 4¢) combined with neutral regime scoring indicates the market has stabilized after volatility, but the extreme YES yield warrants monitoring for late-breaking AI capability announcements before expiry.
Also on kalshi at 24¢(Δ -5¢)
Resolution rules
This market will resolve according to the company that owns the model that has the highest arena score based on the Chatbot Arena LLM Leaderboard (https://lmarena.ai/) when the table under the "Leaderboard" tab is checked on April 30, 2026, 12:00 PM ET. Results from the "Score" column under the "Text Arena | Overall" Leaderboard tab at https://lmarena.ai/leaderboard/text with style control off will be used to resolve this market. Models will be ranked primarily by their arena score at this market’s check time, with alphabetical order of company names as listed in this market group used as a tiebreaker (e.g., if the two models are tied by arena score, “Google” would be ranked ahead of “xAI”). This market will resolve based on the company that occupies first place under this ranking. The resolution source for this market is the Chatbot Arena LLM Leaderboard found at https://lmarena.ai/. If this resolution source is unavailable at check time, this market will remain open until the leaderboard comes back online and will resolve based on the first check after it becomes available. If it becomes permanently unavailable, this market will resolve based on another resolution source.
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sf trade 0xf105ea1a83605540617366526881a245bd0fb586e0cfe15c1582d0d3ee579558 yes 100