
-1%
SpaceX IPO closing market cap above $1.8T?
24h Vol
$83.7K
Liquidity
$117.9K
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 July 2026?. The market currently shows a live probability of 9%, $251.3 in 24h volume, and $9.6K in liquidity.
Probability
9%
24h Volume
$251.3
Liquidity
$9.6K
This market asks whether OpenAI will be the company with the top-ranked AI model on the Chatbot Arena leaderboard at the end of July 2026. It is worth watching because the outcome depends on a very specific public benchmark, not just on product announcements or model launches.
The question is simple: when the leaderboard is checked on July 31, 2026 at 12:00 PM ET, will the model in first place belong to OpenAI? The resolution source is the “Rank” section of the Chatbot Arena LLM Leaderboard on lmarena.ai, using the leaderboard view with the style control off. If models are tied, the market uses the site’s arena score and then a company-name tiebreaker, so the exact ordering rules matter as much as the model names themselves.
OpenAI, like other major AI labs, is competing on a moving target: the model that performs best on one public leaderboard today may not still lead months later. That leaves room for disagreement about whether OpenAI can stay ahead of rivals such as Google, Anthropic, xAI, or others by the end of July 2026. Readers following this market are effectively watching whether OpenAI can hold the top spot under the specific Chatbot Arena ranking system, not whether it has the most popular product or the biggest user base.
Price can move when a new model release, benchmark update, or leaderboard reshuffle changes which company sits at the top of Chatbot Arena. Because the market resolves from the rank shown on a single check date, even a short-lived change near the end of July could matter a lot. It can also move if the leaderboard methodology, tie handling, or the availability of the site changes in a way that affects which company is first under the stated rules.
The current market price implies roughly a 9% 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.
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-1%
24h Vol
$83.7K
Liquidity
$117.9K
Spread
1%
12/31/2027
View marketBefore resolution, readers should verify the exact leaderboard page used by the market rules: the Chatbot Arena LLM Leaderboard, on the Leaderboard tab, with the style control off. The key deadline is the check at July 31, 2026, 12:00 PM ET, even though the market’s end date metadata is shown in UTC; the rule text controls the actual resolution timing. If the leaderboard is unavailable at that moment, the market stays open until it comes back, so the availability of the source and the precise rank order at the check time are the main things to watch.
Track live probability, outcome prices, volume, liquidity, and resolution details for Will OpenAI have the best AI model at the end of July 2026?. The market currently shows a live probability of 9%, $251.3 in 24h volume, and $9.6K in liquidity.
Track live technology prediction markets focused on AI, major tech events, product launches, innovation forecasts, and emerging industry trends.
Yes
9%
No
91%
This market is currently listed with an end date of Jul 31, 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 July 31, 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 present but not especially deep, so spreads and order-book movement still matter.
Spread
The bid-ask spread is wider, so the headline probability may be less precise than it looks.
Recent movement
The 24h move is modest, suggesting the market has not repriced dramatically in the latest feed.
The current displayed probability is 9%, 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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