The US Supreme Court rules on the legality of retail prediction markets before July 2027.

Question

Six frontier AI models put this at 13% by 30 Oct 2027. Full reasoning from every model.

WillHappen.ai · Accepted Answer

13% — the median of 6 frontier models, resolving by 2027-10-30.

Answer

Gemini (Google): 8% — The Supreme Court docket requires cert grants by January to rule by July, leaving too narrow a window for pending CFTC cases. Merits decisions by June 2027 require granting certiorari by mid-January 2027, which no pending prediction market case has achieved. A formal circuit split on the Commodity Exchange Act has yet to materialize, keeping cert denial or percolation as the default base rate. A direct circuit split emerging in early winter accompanied by an expedited briefing schedule would substantially raise these odds.

Answer

Claude (Anthropic): 8% — Case must clear circuit courts and SCOTUS must grant cert before a merits ruling by mid-2027. Current litigation (Kalshi v. CFTC/states) is still at appellate stage, far from a SCOTUS merits decision. Cert petitions, briefing, and argument scheduling typically take 1-2+ years even if granted promptly, leaving little runway. A circuit split could accelerate cert grant, but a full merits ruling by July 2027 would require unusually fast docketing.

Answer

GPT (OpenAI): 18% — It hinges on a circuit split or an unusually urgent federal preemption case reaching certiorari fast. A petition would likely need a final circuit judgment by mid-2027 for briefing and argument before the July recess. The Court hears roughly 60–70 merits cases yearly and usually declines fact-bound regulatory disputes absent a clean split. A state enforcement injunction conflicting with CFTC authority could accelerate review; current exchange litigation is still developing.

Answer

Grok (xAI): 18% — OT2026 cert grant plus merits decision on a live CFTC/event-contract appeal. A circuit opinion must issue by ~Jan 2027 for a petition to be conferenced and argued this term; most pending CFTC cases are still at the circuit. SCOTUS takes ~70 cases/year and almost never commodities-regulation disputes without a split; niche admin-law cert in an 8-month window is rare. A published circuit split or CFTC petition after a loss would be the clearest upward revision.

Answer

DeepSeek (DeepSeek): 12% — A circuit split must fully form and the Solicitor General must back cert before the Court takes a prediction-market case this fast. Only the Ninth Circuit's Kalshi v. CFTC ruling is far along; other circuits haven't split yet, and SCOTUS rarely grants before a genuine conflict matures. The CFTC's 2024 proposed rule on event contracts is still pending, so agencies may moot the issue before any cert petition ripens. Base rate for a novel statutory question reaching merits ruling within ~12 months of a first circuit opinion is under 15%, and no cert petition has even been filed.

Answer

Qwen (Alibaba): 14% — Requires DC Circuit to rule fast enough for cert grant and decision in the October 2026 term—an extremely compressed pipeline. Kalshi v. CFTC DC Circuit appeal likely won't be decided before late 2025 or 2026, leaving barely enough time for cert petition, grant, briefing, and argument before… The Court grants cert on ~1% of petitions and typically wants a circuit split; a single DC Circuit ruling on novel CFTC event-contract authority is unlikely to meet that… A change in CFTC leadership or congressional legislation clarifying event-contract jurisdiction could moot the case entirely before it reaches the Court.

The US Supreme Court rules on the legality of retail prediction markets before July 2027.

The US Supreme Court issues a ruling regarding Donald Trump's Mar-a-Lago ballroom before July 2027.

The US Supreme Court convenes for oral arguments before November 15, 2026.

Christine Lagarde wins the next French presidential election.

The Republican nominee wins the Michigan U.S. Senate election in 2026.