**Claude Fable 5.1-max leads with 93.5% implied probability** due to its September 1 release as Anthropic’s most capable generally available large language model, delivering clear gains on agentic coding, long-horizon knowledge work, and scientific benchmarks such as Terminal-Bench-Science. The update improved reasoning on ambiguous tasks, reduced over-refusal rates, and lowered effective costs through cheaper cache reads while maintaining frontier performance. Recent leaderboards place it ahead of Claude Opus 5 and other contenders, with broad platform availability reinforcing trader consensus. A surprise competitor release or revised evaluation criteria could still shift sentiment before resolution on September 14.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updatedclaude-fable-5.1-max 94%
Other 3.9%
claude-opus-5-max <1%
claude-opus-5-high <1%
$35,209 Vol.
$35,209 Vol.
Sep 14, 2026
claude-fable-5.1-max
94%
Other
4%
claude-opus-5-max
1%
claude-opus-5-high
<1%
claude-opus-4-6-high
<1%
claude-fable-5.1-max 94%
Other 3.9%
claude-opus-5-max <1%
claude-opus-5-high <1%
$35,209 Vol.
$35,209 Vol.
Sep 14, 2026
claude-fable-5.1-max
$13,385 Vol.
94%
Other
$14,349 Vol.
4%
claude-opus-5-max
$2,666 Vol.
1%
claude-opus-5-high
$4,150 Vol.
<1%
claude-opus-4-6-high
$659 Vol.
<1%
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.
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".**Claude Fable 5.1-max leads with 93.5% implied probability** due to its September 1 release as Anthropic’s most capable generally available large language model, delivering clear gains on agentic coding, long-horizon knowledge work, and scientific benchmarks such as Terminal-Bench-Science. The update improved reasoning on ambiguous tasks, reduced over-refusal rates, and lowered effective costs through cheaper cache reads while maintaining frontier performance. Recent leaderboards place it ahead of Claude Opus 5 and other contenders, with broad platform availability reinforcing trader consensus. A surprise competitor release or revised evaluation criteria could still shift sentiment before resolution on September 14.
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.
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".
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".
Market Opened: Sep 3, 2026, 10:16 AM ET
Volume
$35,209End Date
Sep 14, 2026Market Opened
Sep 3, 2026, 10:16 AM ETResolution Source
https://arena.ai/leaderboard/text/overall-no-style-controlResolver
0x69c47De9D...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.
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".**Claude Fable 5.1-max leads with 93.5% implied probability** due to its September 1 release as Anthropic’s most capable generally available large language model, delivering clear gains on agentic coding, long-horizon knowledge work, and scientific benchmarks such as Terminal-Bench-Science. The update improved reasoning on ambiguous tasks, reduced over-refusal rates, and lowered effective costs through cheaper cache reads while maintaining frontier performance. Recent leaderboards place it ahead of Claude Opus 5 and other contenders, with broad platform availability reinforcing trader consensus. A surprise competitor release or revised evaluation criteria could still shift sentiment before resolution on September 14.
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.
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".
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".
Volume
$35,209End Date
Sep 14, 2026Market Opened
Sep 3, 2026, 10:16 AM ETResolution Source
https://arena.ai/leaderboard/text/overall-no-style-controlResolver
0x69c47De9D...**Claude Fable 5.1-max leads with 93.5% implied probability** due to its September 1 release as Anthropic’s most capable generally available large language model, delivering clear gains on agentic coding, long-horizon knowledge work, and scientific benchmarks such as Terminal-Bench-Science. The update improved reasoning on ambiguous tasks, reduced over-refusal rates, and lowered effective costs through cheaper cache reads while maintaining frontier performance. Recent leaderboards place it ahead of Claude Opus 5 and other contenders, with broad platform availability reinforcing trader consensus. A surprise competitor release or revised evaluation criteria could still shift sentiment before resolution on September 14.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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Frequently Asked Questions