
-3%
SpaceX IPO closing market cap above $3T?
24h Vol
$169.4K
Liquidity
$152.5K
Spread
1%
12/31/2027
View marketTechnology
Polymarket market
Track live probability, outcome prices, volume, liquidity, and resolution details for Will OpenAI have the best AI model at the end of June 2026?. The market currently shows a live probability of 4%, $25.1K in 24h volume, and $80.6K in liquidity.
Probability
4%
24h Volume
$25.1K
Liquidity
$80.6K
This market asks whether OpenAI will own the top-ranked model on the Chatbot Arena leaderboard at the June 30, 2026 check time. It is worth watching because the result depends on a public benchmark that can change as labs ship new models, update existing ones, or see rankings shift against competitors like Google, Anthropic, xAI, and others.
The question is not whether OpenAI has a strong model in general, but whether the company behind the model in first place on the Chatbot Arena LLM Leaderboard will be OpenAI at the specific resolution time. The market resolves using the "Rank" section on the Leaderboard tab at lmarena.ai/leaderboard/text, with style control off, checked on June 30, 2026 at 12:00 PM ET. If two models are tied on rank, the market uses Arena score, including underlying unrounded values, and then company-name alphabetical order as the final tiebreaker.
OpenAI has been a frequent contender for the top spot in public model rankings, but the leaderboard can move quickly as new releases arrive and as user preferences in head-to-head testing change. That creates uncertainty about whether OpenAI will still be first at the exact cutoff date, especially since the market is keyed to a single public table rather than to subjective claims about model quality. The market is essentially pricing disagreement over who will hold the number-one position on that date and whether OpenAI will be able to stay ahead of rivals.
A new OpenAI model release, a major update to an existing model, or a leaderboard climb by an OpenAI model would make this outcome look more likely. The price can also move if another company—such as Google, Anthropic, or xAI—posts a model that overtakes OpenAI on the Chatbot Arena ranking before the check time. Even without a new launch, changes in Arena score, tie-breaking details, or a shift in which model is shown first on the ranked list can matter because the resolution follows the leaderboard exactly.
Related markets

-3%
24h Vol
$169.4K
Liquidity
$152.5K
Spread
1%
12/31/2027
View marketThe current market price implies roughly a 4% chance for the leading outcome, based on live Polymarket pricing. That number is not a prediction from PredictionNinja and it is not a guarantee; it is the current crowd-priced view of the market and can change quickly when new information appears.
Readers should check the Chatbot Arena LLM Leaderboard itself, specifically the "Rank" section with style control off, because that is the source of truth for this market. The key deadline is June 30, 2026 at 12:00 PM ET, and the market resolves on the company behind the model in first place at that moment. If the leaderboard is temporarily unavailable, the market stays open until it returns, so the exact check time and the published ranking order are the most important details to verify. Any ambiguity around tied ranks should be read against the stated tie-break rules: Arena score first, then alphabetical company order if needed.
Track live probability, outcome prices, volume, liquidity, and resolution details for Will OpenAI have the best AI model at the end of June 2026?. The market currently shows a live probability of 4%, $25.1K in 24h volume, and $80.6K in liquidity.
Track live technology prediction markets focused on AI, major tech events, product launches, innovation forecasts, and emerging industry trends.
Yes
3.5%
No
96.5%
This market is currently listed with an end date of Jun 30, 2026. Market timelines can change if the underlying event is postponed, rescheduled, or resolved early.
This market will resolve according to the company which owns the model which has the highest arena rank based off the Chatbot Arena LLM Leaderboard (https://lmarena.ai/) when the table under the "Leaderboard" tab is checked on June 30, 2026, 12:00 PM ET. Results from the "Rank" section on the Leaderboard tab of https://lmarena.ai/leaderboard/text with the style control off will be used to resolve this market. Models will be ordered primarily by their leaderboard rank at the market’s check time. If two or more models are tied on rank, they will be ordered by their Arena score, including any underlying, unrounded, granular values reflected in the data below the leaderboard. If a tie remains, alphabetical order of company names as listed in this market group will be used as a final tiebreaker (e.g., if the two models are tied by exact arena score, “Google” would be ranked ahead of “xAI”). This market will resolve based on the company that occupies first place under this ranking system. 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 resolve based on the first check after it becomes available. If it becomes permanently unavailable, this market will resolve based on another resolution source.
Probability signal
The current price implies a lower-probability outcome, which can make the market more sensitive to surprise news.
Liquidity context
Liquidity is relatively deep for a prediction market page, so quoted prices may be more reliable than very thin markets.
Spread
The bid-ask spread is tight, which usually points to a more actively priced market.
Recent movement
The 24h move is modest, suggesting the market has not repriced dramatically in the latest feed.
The current displayed probability is 4%, based on the latest normalized Polymarket data available to PredictionNinja.
The rules and resolution criteria are pulled from the market description provided by Polymarket when available.
Prediction markets can move whenever traders react to new information, liquidity changes, injuries, announcements, news, or other event-specific developments.
No. PredictionNinja displays market data and context for research only. It is not financial, legal, betting, or investment advice.

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