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Will the next Fable model (5.2+) debut at a score of at least 1540 by June 30, 2027?
Next Fable Model (5.2+): Text Arena Debut?
Screened using the explicit question date; payout timing still follows the rules.
Contract resolution rules
Predicts whether the next Fable 5.2+ model on the Arena.AI text leaderboard scores at least 1540 within one day of first appearing, with a July 2027 fallback.
Conditions for a winning outcome
A model qualifies if its name or identifier includes "Fable" and its version is 5.2 or higher (e.g., Claude Fable 6). It must be newly added to the Arena.AI Leaderboard (https://arena.ai/leaderboard/text/overall-no-style-control), displayed without an "AutoEval" label. Its score is taken from the "Score" column under the "Text Arena | Overall" tab with style control off. The market resolves "Yes" if this score is at least 1540 at 12:00 PM ET on the calendar date following the date the model first appears. If multiple models are added on the same ET calendar date, the highest-scoring one is used; models added on the calendar date following the initial qualifying model's first appearance are not considered.
Exclusions and exceptions
The market resolves "No" if: the model is removed and not re-added before the 12:00 PM ET check; the leaderboard is unavailable at that check time and no subsequent score becomes available within seven days after the model's first appearance (the source attempts resolution at the first subsequent available instance before defaulting to "No"); or no qualifying Fable 5.2+ model appears by June 30, 2027, 11:59 PM ET. Models named without "Fable" or with versions below 5.2 (e.g., Claude Fable 5.1, Claude Mythos 5.1) do not qualify. Models marked "AutoEval" are excluded.
Timing & resolution
The primary check is 12:00 PM ET on the calendar day after the qualifying model first appears. The final fallback deadline is June 30, 2027, 11:59 PM ET. The provider end date is 2027-07-01T03:59:00Z, which equals 11:59 PM ET on June 30, 2027 (EDT, UTC-4), matching the rule's stated cutoff.
Ambiguities in the rules
The exact meaning of "first appears on the leaderboard" is not defined for models visible but not yet officially added, and the source does not clarify whether a model briefly visible then removed qualifies. The seven-day fallback window is bounded; it is unclear what happens if the source recovers after that window but before the June 30 cutoff. Whether a model that is newly added but later removed and re-added qualifies on its second addition is not addressed.
AI-assisted explanation of this version of the source rules. It does not replace the provider’s terms.
Original resolution rules
Outcome prices and implied probabilities
Compare the quoted price for each outcome. The amounts below assume a $1 payout for a winning share.
Prices describe trading, not certainty or an independent forecast. Bid / ask for the first outcome: 0.19 / 0.2. Market liquidity is not guaranteed fill size.
Fetched 2026-10-23T16:00:09+00:00 · Provider updated 2026-10-23T15:58:05.90581Z
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