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Will the next Fable model (5.2+) debut at a score of at least 1500 by June 30, 2027?

Next Fable Model (5.2+): Text Arena Debut?

Screened using the explicit question date; payout timing still follows the rules.

Provider end date 1 Jul 2027Liquidity $7.7kLifetime volume $8.6kSource Polymarket

Contract resolution rules

AI-assisted explanation

Yes requires the next qualifying Anthropic Claude Fable 5.2+ addition to Arena.AI to have a displayed Score of at least 1500 at noon ET the day after first appearing, subject to the source-outage fallback. If multiple qualifying models appear that first day, use the highest-scoring one. Otherwise, No.

Conditions for a winning outcome

The newly added model's name or identifier must include Fable and designate version 5.2 or higher, including whole-number generations such as Fable 6. Capitalization, prefixes, suffixes, dates and descriptors do not matter. Prior release, beta access or public availability is irrelevant. Use only the displayed Score column on Text Arena | Overall with style control off, not granular or unrounded data elsewhere. Only entries without AutoEval count. Among qualifying models added on the same first calendar date (ET), use the highest-scoring model.

Exclusions and exceptions

Names without Fable, versions below 5.2 and AutoEval entries do not count. An appearance does not count if the model is removed and not re-added by noon ET the following day. Models added on the calendar day after the initial qualifying appearance are excluded. No results if the selected model's relevant displayed Score is below 1500, no qualifying model arrives by the cutoff, or the resolution source remains unavailable through the end of day seven after first appearance.

Timing & resolution

Qualifying debut cutoff: June 30, 2027, 11:59 PM ET. Check at noon ET the next calendar day. If the source is unavailable, use the first subsequent available score; resolve No if unavailable through the end of day seven after first appearance.

Ambiguities in the rules

No material ambiguity. The June 30 cutoff governs the qualifying debut; the next-day score check may occur after that date.

AI-assisted explanation of this version of the source rules. It does not replace the provider’s terms.

Original resolution rules
This market will resolve to "Yes" if the next Anthropic Claude Fable model (5.2+) 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". A qualifying model must have a name or model identifier that includes "Fable" and be designated as version 5.2 or higher, regardless of capitalization or surrounding prefixes, suffixes, dates, or descriptors. For example, a version 5.2 or higher named in the same manner as Claude Fable 5 or Claude Fable 5.1 would qualify, including a new whole-number generation such as Claude Fable 6, while models whose name does not include "Fable" or which retain a version designation below 5.2, such as Claude Fable 5.1 or Claude Mythos 5.1, 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 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".

Outcome prices and implied probabilities

Compare the quoted price for each outcome. The amounts below assume a $1 payout for a winning share.

Yes93.4%
93.35¢ indicative price per $1 winning payout
No6.7%
6.65¢ indicative price per $1 winning payout

Prices describe trading, not certainty or an independent forecast. Bid / ask for the first outcome: 0.922 / 0.945. Market liquidity is not guaranteed fill size.

Fetched 2026-10-23T13:00:10+00:00 · Provider updated 2026-10-23T12:58:05.66909Z

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