Claude Fable 5.1-max leads trader sentiment at 69.5% implied probability because Anthropic released the model on September 1, 2026, as its frontier Mythos-class system optimized for long-horizon agentic coding, multistep research, and complex knowledge work. It improves on Fable 5 with stronger adaptive reasoning, a 1M-token context window, and 75% lower cache-read pricing while posting leading scores on benchmarks such as SWE-bench Pro, Terminal-Bench, and CursorBench. Opus 5 variants trail far behind as they sit one tier lower in capability, and no competing releases from OpenAI or Google have appeared in the past ten days to shift the consensus. The September 21 resolution leaves little time for another model to overtake Fable 5.1 before the market closes.
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-fable-5.1-max 70%
Other 25%
claude-opus-5-max 2.6%
claude-opus-5-high 2.2%
$10,001 Vol.
$10,001 Vol.
claude-fable-5.1-max
70%
Other
25%
claude-opus-5-max
3%
claude-opus-5-high
2%
claude-opus-4-6-high
1%
claude-fable-5.1-max 70%
Other 25%
claude-opus-5-max 2.6%
claude-opus-5-high 2.2%
$10,001 Vol.
$10,001 Vol.
claude-fable-5.1-max
70%
Other
25%
claude-opus-5-max
3%
claude-opus-5-high
2%
claude-opus-4-6-high
1%
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...Claude Fable 5.1-max leads trader sentiment at 69.5% implied probability because Anthropic released the model on September 1, 2026, as its frontier Mythos-class system optimized for long-horizon agentic coding, multistep research, and complex knowledge work. It improves on Fable 5 with stronger adaptive reasoning, a 1M-token context window, and 75% lower cache-read pricing while posting leading scores on benchmarks such as SWE-bench Pro, Terminal-Bench, and CursorBench. Opus 5 variants trail far behind as they sit one tier lower in capability, and no competing releases from OpenAI or Google have appeared in the past ten days to shift the consensus. The September 21 resolution leaves little time for another model to overtake Fable 5.1 before the market closes.
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


Mag-ingat sa mga external link.
Mag-ingat sa mga external link.
Mga Madalas na Tanong