Recent release of Claude Fable 5.1 on September 1 has positioned the updated Mythos-class model as the frontrunner for coding and knowledge-work benchmarks, driving its 35% market-implied odds through superior long-horizon agentic performance and research capabilities. Closely matched probabilities among variants reflect Anthropic’s rapid iteration, with Opus 5 delivering near-frontier results at half the cost of Fable-tier pricing and strong Frontier-Bench scores, while older Opus 4.6 and 5-high variants retain relevance for specific effort settings or cost-sensitive use cases. Traders weigh these efficiency gains and recent benchmark leadership against potential shifts from competing labs or any last-minute Fable 5.1 refinements before the September 14 resolution.
Eksperimental na AI-generated summary na nire-reference ang Polymarket data. Hindi ito trading advice at wala itong papel sa kung paano nire-resolve ang market na ito. · Na-updateBest AI model on September 14?
claude-fable-5.1-max 35%
Other 26%
claude-opus-5-high 24%
claude-opus-5-max 19%
claude-fable-5.1-max
35%
Other
26%
claude-opus-5-high
24%
claude-opus-5-max
19%
claude-opus-4-6-high
17%
claude-fable-5.1-max 35%
Other 26%
claude-opus-5-high 24%
claude-opus-5-max 19%
claude-fable-5.1-max
35%
Other
26%
claude-opus-5-high
24%
claude-opus-5-max
19%
claude-opus-4-6-high
17%
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.
No new model will be added to this market after market creation. Any model not explicitly listed in this market will be encompassed under the "Other" option.
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 model names as listed in this market group (full string, including suffixes such as “-high” and “-max”) will be used as a final tiebreaker (e.g., if two models remain tied, “claude-opus-5-high” would be ranked ahead of “claude-opus-5-max”). This market will resolve to the model that comes first according to this order.
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".
Binuksan ang Market: Sep 3, 2026, 10:16 AM ET
Resolution Source
https://arena.ai/leaderboard/text/overall-no-style-controlResolver
0x69c47De9D...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.
No new model will be added to this market after market creation. Any model not explicitly listed in this market will be encompassed under the "Other" option.
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 model names as listed in this market group (full string, including suffixes such as “-high” and “-max”) will be used as a final tiebreaker (e.g., if two models remain tied, “claude-opus-5-high” would be ranked ahead of “claude-opus-5-max”). This market will resolve to the model that comes first according to this order.
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".
Resolution Source
https://arena.ai/leaderboard/text/overall-no-style-controlResolver
0x69c47De9D...Recent release of Claude Fable 5.1 on September 1 has positioned the updated Mythos-class model as the frontrunner for coding and knowledge-work benchmarks, driving its 35% market-implied odds through superior long-horizon agentic performance and research capabilities. Closely matched probabilities among variants reflect Anthropic’s rapid iteration, with Opus 5 delivering near-frontier results at half the cost of Fable-tier pricing and strong Frontier-Bench scores, while older Opus 4.6 and 5-high variants retain relevance for specific effort settings or cost-sensitive use cases. Traders weigh these efficiency gains and recent benchmark leadership against potential shifts from competing labs or any last-minute Fable 5.1 refinements before the September 14 resolution.
Eksperimental na AI-generated summary na nire-reference ang Polymarket data. Hindi ito trading advice at wala itong papel sa kung paano nire-resolve ang market na ito. · Na-update

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