Best AI model on August 10?: how this market works

What you need to know

This market asks which AI model will be ranked number one on a specific public leaderboard called Arena.ai on August 10, 2026. The leaderboard ranks AI models based on how real users rate them in head-to-head text conversations. Right now the market believes claude-opus-4-6-thinking is most likely to hold that top spot, but a full 38% chance goes to 'Other', meaning some model not individually listed here could win instead. On August 10, 2026 at 12:00 PM Eastern Time, someone checks the Arena.ai Text Arena Overall leaderboard with style control off and no adjustments applied. Whichever model sits at rank 1 at that exact moment wins. If two models tie on rank, the tiebreaker goes to the higher underlying score, then alphabetical order. One important edge case: if the Arena.ai site is down that day, the market waits until it comes back online. If the site shuts down permanently, the market resolves to 'Other'. None of the provided news headlines relate to this market. They cover unrelated topics like political protests and entertainment. There is no relevant recent AI news to point to here. The kind of development that would matter is a new top-ranked model appearing on the Arena.ai leaderboard, or a major update to an existing model that shifts its ranking significantly. The AI model landscape changes fast, and that is the core challenge. A new model from any major lab could launch before August 2026 and immediately climb to the top of the leaderboard, which is exactly what the 38% 'Other' probability reflects. Arena rankings also shift gradually as more users submit ratings, so a model leading today can slip later. Over a full year, multiple rounds of new releases and user voting make the top position genuinely hard to forecast with confidence.

The odds right now

• claude-opus-4-6-thinking61%
• Other38%
• claude-fable-52%
• claude-opus-4-61%

Price history

How this resolves

Resolves August 10, 2026

This market will resolve according to the model that has the highest arena rank based on the arena.ai Text Arena (Overall) when the table under the "Leaderboard" tab is checked on the specified date, 12:00 PM ET. Results from the "Rank" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall-no-style-control with style control off (Adjustments: None) and filtered for "Models" will be used to resolve this market. Read the full resolution rules on the live market page.

Related

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These apps all route to the same exchange order book. The difference is what each one adds on top of the exchange's own fee.

Published rates, checked July 2026. MetaMask charges a flat 4 percent per prediction trade. Jupiter adds a fee equal to the exchange's own taker fee at fill time, roughly 2 to 4 percent at typical odds. Where a market carries an exchange settlement fee, it applies everywhere, whichever app you use. Paridesk adds nothing on maker orders.

Trade this market on Paridesk: non-custodial, 0.5% fee.