
-3%
SpaceX IPO closing market cap above $3T?
24h Vol
$161.1K
Liquidity
$139.3K
Spread
1%
12/31/2027
View marketTechnology
Polymarket market
Track live probability, outcome prices, volume, liquidity, and resolution details for Will the next Claude Opus 4.8 model added to the Arena Leaderboard debut at a score between 1490 and 1500?. The market currently shows a live probability of 54%, $910.9 in 24h volume, and $1.2K in liquidity.
Probability
54%
24h Volume
$910.9
Liquidity
$1.2K
This market is about the first Arena.AI Leaderboard appearance of a newly added Claude Opus 4.8 model and whether its published score lands in a narrow band: 1490 to 1500. The headline matters because Arena scores are a public benchmark used to compare chat models, and small differences around this range can change how a release is perceived.
The event is the next qualifying Claude model labeled "Opus 4.8" that appears on the Arena.AI Leaderboard at lmarena.ai/leaderboard/text, with resolution based on the Score column for the "Text Arena | Overall" tab and style control off. The market looks at the score recorded at 12:00 PM ET on the calendar day after that first appearance, and it resolves "Yes" only if that score is between 1490 and 1500 inclusive, with a tie between brackets rounded up to the higher bracket. Only a newly added Claude Opus 4.8 variant qualifies; models labeled Sonnet, Haiku, or other non-Opus 4.8 names do not.
There is uncertainty because model releases can appear on the leaderboard with different variants, and their scores may land just above or below this tight 10-point range. Readers may care because the Arena score is a public shorthand for how a model performs against other chat models, so a score in the 1490s can affect how strong a debut looks. The market is pricing disagreement about where the next Opus 4.8 entry will land, not whether a model will appear at all.
The biggest price mover would be the first public addition of a Claude model actually labeled Opus 4.8 on the leaderboard, because that starts the resolution clock. Once it appears, the displayed Score column for the qualifying entry is the key number, and any update that changes which qualifying model is the highest-scoring one on that same day would matter under the rules. If the added Claude model is tagged as a different family, such as Sonnet or Haiku, that would not count and would push attention back to whether another qualifying Opus 4.8 entry shows up.
Related markets

-3%
24h Vol
$161.1K
Liquidity
$139.3K
Spread
1%
12/31/2027
View marketThe current market price implies roughly a 54% 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.
Before resolution, check the exact leaderboard tab named in the rules, the Score column, and whether style control is off, since those details determine the official number used. The market also depends on the first calendar date an Opus 4.8 model appears, because only models added on that day are eligible and later additions are excluded. If multiple qualifying Opus 4.8 models appear on the same ET date, the highest-scoring one is used, so readers should verify both the label and the date of first appearance rather than relying on a model name alone.
Track live probability, outcome prices, volume, liquidity, and resolution details for Will the next Claude Opus 4.8 model added to the Arena Leaderboard debut at a score between 1490 and 1500?. The market currently shows a live probability of 54%, $910.9 in 24h volume, and $1.2K in liquidity.
Track live technology prediction markets focused on AI, major tech events, product launches, innovation forecasts, and emerging industry trends.
Yes
54%
No
46%
Polymarket has not provided a clear end date for this market yet.
This market will resolve according to the score the next Claude Opus 4.8 model added to the Arena.AI Leaderboard (arena.ai/leaderboard/text) has at 12:00 PM ET on the calendar date following the date on which it first appears on the leaderboard. Otherwise, this market will resolve to "No". If the relevant score falls exactly between two brackets, this market will resolve to the higher bracket. Any Claude model newly added to the leaderboard and labeled as "Opus 4.8" may qualify (e.g., claude-opus-4.8, claude-opus-4.8-thinking, claude-opus-4.8-preview, or similar). Claude models labeled only as Sonnet, Haiku, or another non-Opus 4.8 variant will not qualify. 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. This market will resolve solely based on the specified score in the Score column of the leaderboard, regardless of any underlying granular or unrounded data presented elsewhere. If multiple qualifying models are added to the leaderboard on the same calendar date (ET), the highest-scoring model will be used for resolution. Models added to the leaderboard on the calendar date following the initial qualifying model’s first appearance will not be considered. A qualifying model must be newly added to the Arena.AI Leaderboard. Whether the model was previously released, publicly accessible, in beta, or otherwise available before appearing on the leaderboard is irrelevant for this market. The resolution source for this market is the Chatbot Arena LLM Leaderboard found at arena.ai/leaderboard/text. If this resolution source is unavailable at 12:00 PM ET on the calendar date following the date on which the qualifying model first appears on the leaderboard, this market will resolve based on the first subsequent instance at which such a score becomes available on the leaderboard. If it remains unavailable through the end of the seventh day after the qualifying model first appears on the leaderboard or if no qualifying model release occurs by June 30, 2026, 11:59 PM ET, this market will resolve to the lowest bracket.
Probability signal
The market is priced near the middle, which usually means traders are still weighing competing outcomes.
Liquidity context
Liquidity is present but not especially deep, so spreads and order-book movement still matter.
Spread
The bid-ask spread is tight, which usually points to a more actively priced market.
Recent movement
The 24h move is notable, so recent news or market activity may have changed trader expectations.
The current displayed probability is 54%, 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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