The public forecasting tournament from the Superforecasting researchers
Last updated: July 2026
Good Judgment Open is the public forecasting platform run by Good Judgment Inc., the organisation born out of the research that produced the concept of 'Superforecasters' — ordinary people who, with the right methods, consistently out-predict experts on geopolitical and world events. Like Metaculus, it's a forecasting tournament rather than a money-based market: participants make and update probabilistic forecasts on questions about geopolitics, economics, science, and current events, and are scored on accuracy (via Brier scores) over time, with leaderboards identifying the strongest forecasters. Its lineage is its credibility — the methodology traces directly to the Good Judgment Project that won IARPA's forecasting tournament — and it serves as both a public arena for skilled forecasters and a talent funnel for Good Judgment's professional Superforecaster work. Participation is free. The considerations: with no money at stake, incentives and signal differ from real-money markets — proponents argue disciplined forecasting tournaments produce excellent calibration, while others prefer the skin-in-the-game of capital; questions are geopolitics- and world-events-focused rather than broad; and it's aimed at serious forecasters, not casual users seeking a quick bet. But for anyone who wants to sharpen their forecasting against a rigorous, research-backed scoring system — or to see how the methods behind Superforecasting play out in public — Good Judgment Open is the definitive platform of its kind.
Good Judgment Open offers a free plan.
Good Judgment Open
Free
| Feature | Good Judgment Open |
|---|---|
| Settlement Mechanism | Admin resolution |
| Trading Model | Forecast tournament (no money) |
| Collateral Token | None (Brier score) |
| Min Trade | N/A |
| Api Access | ✗ |
| Embeddable Odds | ✗ |
| Geo Restrictions | None |
| Market Creation | Platform-set |
| Mobile App | ✗ |
| Governance Token | ✗ |
Yes, Good Judgment Open has a free plan.
Good Judgment Open is used for the public forecasting tournament from the superforecasting researchers. It's primarily used by Web3 teams in the Prediction Markets category.
See our full alternatives comparison at https://chainpick.io/alternatives/good-judgment-open.
Good Judgment Open has a rating of 4.2/5 based on 61 reviews. Key strength: Backed by the research behind Superforecasting. Main limitation: No money at stake — different signal than real markets.
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