Trader consensus shows a tight contest in the best AI model market heading into September 21, with Claude Fable 5.1 Max at 42% implied probability narrowly ahead of Claude Opus 5 High at 41.5%. Recent benchmark results and capability demonstrations from Anthropic have highlighted comparable strengths in reasoning, coding, and multimodal tasks across these large language models, leaving limited separation. Key differentiating factors include parameter efficiency, safety alignments, and real-world application performance that traders are weighing against historical release patterns. Upcoming developer updates or third-party evaluations could still alter positioning before resolution, reflecting the inherent uncertainty in AI forecasting.
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 21?
claude-opus-5-high 44%
Other 15%
claude-opus-5-max 12%
claude-opus-4-6-high 7%
claude-opus-5-high
44%
Other
15%
claude-opus-5-max
12%
claude-opus-4-6-high
7%
claude-fable-5.1-max
47%
claude-opus-5-high 44%
Other 15%
claude-opus-5-max 12%
claude-opus-4-6-high 7%
claude-opus-5-high
44%
Other
15%
claude-opus-5-max
12%
claude-opus-4-6-high
7%
claude-fable-5.1-max
47%
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
Resolver
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".
Resolver
0x69c47De9D...Trader consensus shows a tight contest in the best AI model market heading into September 21, with Claude Fable 5.1 Max at 42% implied probability narrowly ahead of Claude Opus 5 High at 41.5%. Recent benchmark results and capability demonstrations from Anthropic have highlighted comparable strengths in reasoning, coding, and multimodal tasks across these large language models, leaving limited separation. Key differentiating factors include parameter efficiency, safety alignments, and real-world application performance that traders are weighing against historical release patterns. Upcoming developer updates or third-party evaluations could still alter positioning before resolution, reflecting the inherent uncertainty in AI forecasting.
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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