Anthropic’s September 1 release of Claude Fable 5.1 and Mythos 5.1, which quickly established new SOTA results on long-horizon agentic coding and knowledge-work benchmarks, anchors current trader sentiment for the subsequent Mythos-class model. The 50% implied probability on a Text Arena debut at #1 reflects tight competition from models such as Meta’s Muse Spark and OpenAI’s latest GPT variants, combined with Anthropic’s typical 3–5 month release cadence, ongoing safety reviews for cyber capabilities, and compute scaling constraints. Key swing factors include any official timeline signals from Anthropic, credible leaks on capability jumps, or rival leaderboard surges before year-end resolution.
Experimentelle KI-generierte Zusammenfassung mit Polymarket-Daten. Dies ist keine Handelsberatung und spielt keine Rolle bei der Auflösung dieses Marktes. · AktualisiertWird das nächste Mythos-Klasse Modell als #1 debütieren? (Text Arena)
Ja
Ja
Any model whose official name includes "Mythos," or "Fable" (e.g., Claude Fable 5.1 or Claude Fable 6), or that Anthropic officially describes as a "Mythos-class" model or similar, will qualify for this market's resolution. Anthropic's other model tiers, such as Opus, Sonnet, or Haiku, will not qualify.
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. This market will resolve solely based on the specified rank in the Rank column of the leaderboard, regardless of any underlying granular or unrounded data presented elsewhere.
A model marked "AutoEval" will not be considered added to the leaderboard. Only ranks displayed without the "AutoEval" label will be considered.
If multiple qualifying models are added to the leaderboard on the same calendar date (ET), the highest-ranking model will be used for resolution. Models added to the leaderboard on the calendar date following the initial qualifying model's first appearance will not be considered. If a model is first added to the Arena.AI Leaderboard but is subsequently removed and not re-added, such that it is not displayed on the leaderboard at 12:00 PM ET on the calendar date following its first appearance, its appearance will not qualify as added to the Arena.AI Leaderboard.
A qualifying model must be newly added to the Arena.AI Leaderboard. Whether the model was previously released, publicly accessible, in beta, or otherwise available before appearing on the leaderboard is irrelevant for this market.
The resolution source for this market is the Chatbot Arena LLM Leaderboard found at https://arena.ai/leaderboard/text/overall-no-style-control. If this resolution source is unavailable at 12:00 PM ET on the calendar date following the date on which the qualifying model first appears on the leaderboard, this market will resolve based on the first subsequent instance at which such a score becomes available on the leaderboard. If it remains unavailable through the end of the seventh day after the qualifying model first appears on the leaderboard or if no qualifying model release occurs by June 30, 2027, 11:59 PM ET, this market will resolve to "No".
Markt eröffnet: Sep 1, 2026, 11:27 AM ET
Abwicklungsquelle
https://arena.ai/leaderboard/text/overall-no-style-controlAbwickler
0x65070BE91...Any model whose official name includes "Mythos," or "Fable" (e.g., Claude Fable 5.1 or Claude Fable 6), or that Anthropic officially describes as a "Mythos-class" model or similar, will qualify for this market's resolution. Anthropic's other model tiers, such as Opus, Sonnet, or Haiku, will not qualify.
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. This market will resolve solely based on the specified rank in the Rank column of the leaderboard, regardless of any underlying granular or unrounded data presented elsewhere.
A model marked "AutoEval" will not be considered added to the leaderboard. Only ranks displayed without the "AutoEval" label will be considered.
If multiple qualifying models are added to the leaderboard on the same calendar date (ET), the highest-ranking model will be used for resolution. Models added to the leaderboard on the calendar date following the initial qualifying model's first appearance will not be considered. If a model is first added to the Arena.AI Leaderboard but is subsequently removed and not re-added, such that it is not displayed on the leaderboard at 12:00 PM ET on the calendar date following its first appearance, its appearance will not qualify as added to the Arena.AI Leaderboard.
A qualifying model must be newly added to the Arena.AI Leaderboard. Whether the model was previously released, publicly accessible, in beta, or otherwise available before appearing on the leaderboard is irrelevant for this market.
The resolution source for this market is the Chatbot Arena LLM Leaderboard found at https://arena.ai/leaderboard/text/overall-no-style-control. If this resolution source is unavailable at 12:00 PM ET on the calendar date following the date on which the qualifying model first appears on the leaderboard, this market will resolve based on the first subsequent instance at which such a score becomes available on the leaderboard. If it remains unavailable through the end of the seventh day after the qualifying model first appears on the leaderboard or if no qualifying model release occurs by June 30, 2027, 11:59 PM ET, this market will resolve to "No".
Abwicklungsquelle
https://arena.ai/leaderboard/text/overall-no-style-controlAbwickler
0x65070BE91...Anthropic’s September 1 release of Claude Fable 5.1 and Mythos 5.1, which quickly established new SOTA results on long-horizon agentic coding and knowledge-work benchmarks, anchors current trader sentiment for the subsequent Mythos-class model. The 50% implied probability on a Text Arena debut at #1 reflects tight competition from models such as Meta’s Muse Spark and OpenAI’s latest GPT variants, combined with Anthropic’s typical 3–5 month release cadence, ongoing safety reviews for cyber capabilities, and compute scaling constraints. Key swing factors include any official timeline signals from Anthropic, credible leaks on capability jumps, or rival leaderboard surges before year-end resolution.
Experimentelle KI-generierte Zusammenfassung mit Polymarket-Daten. Dies ist keine Handelsberatung und spielt keine Rolle bei der Auflösung dieses Marktes. · Aktualisiert
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