Which company has the best AI model end of October?Anthropic
Open$523Kas of
Odds now
The market prices a 27% chance that this market resolves YES, as of .
YES27¢
NO74¢
as of
What moved the odds?
2 AI-matched news signals on this market, newest first. Entry price is the called side when the news hit; the signed return marks it against the live price as of .
Anthropic is launching a new AI model designed to accomplish a wide range of business tasks at a lower cost, as the startup seeks to stay ahead of the competition before its initial public offering. The new model, called Claude Opus 5.5, offers performance similar to Fable 5.1, but at a significantly lower cost. According to the company, the new model produces output faster than Opus 5, and tests have shown it writes more clearly. Anthropic plans to expand the 5.5 model family with the release of new versions of Claude Sonnet and Haiku in the coming weeks. #Arabic_Business
Anthropic launches its most powerful AI yet, along with textual watermarking.
Where does the news lean?
9YES3NO9neutraltrailing 24h
Average match confidence across the listed signals: 94%.
What would make this resolve YES?
This market will resolve according to the company which owns the model which has the highest arena rank based on the arena.ai Text Arena (Overall) when the table under the "Leaderboard" tab is checked on October 31, 2026, 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.
Note: Models marked “AutoEval” at the applicable check time will not be considered, regardless of whether they display a rank or score.
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 still 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 “SpaceXAI”). This market will resolve based on the company that occupies first place under this ranking.
The resolution source for this market is the arena.ai Text Arena (Overall). 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 to "Other".
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