Next Mythos-Class Model: Text Arena Debut?
As of Thu, 03 Sep 2026 16:24:36 UTC, Polymarket traders price Yes (100.0%). The market has $1K in volume and closes on Thu, 31 Dec 2026.
Updated:
Current odds
| Outcome | Chance | Yes price | No price |
|---|---|---|---|
| Yes | 100.0% | 100.0¢ | 0.1¢ |
Market details
- Venue: Polymarket
- Volume: $1K
- Liquidity: $2K
- Closes:
Resolution rules
This market will resolve to "Yes" if the next Anthropic Mythos-class model added to the Arena.AI Leaderboard (https://arena.ai/leaderboard/text/overall-no-style-control) has at least the specified score at 12:00 PM ET on the calendar date following the date on which it first appears on the leaderboard. Otherwise, this market will resolve to "No". 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 "Score" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall-no-style-control with style control off will be used to resolve this market. This market will resolve solely based on the specified score in the Score 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 scores displayed without the "AutoEval" label will be considered. If multiple models are added to the leaderboard on the same calendar date (ET), the highest-scoring 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 Le…
Sources
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