Platform · Forecasting
Good Judgment Open
Free public forecasting tournament · Brier-scored, no money on the line · by the commercial successor to Tetlock's IARPA-winning team.
- Mechanism
- Forecasting
- Status
- Live
- Founded
- 2015
- Market types
- Binary · Multi-outcome · Scalar
- Audience
- Forecasters · AI/researchers · Institutional · Generalist · Politics
- Website
- www.gjopen.com/
- @GJ_Open
Pricing mechanism
No pricing (forecasting)
Settlement
Centralized operator
Strengths
- Tetlock-grade academic credibility
- Real talent pipeline to paid Superforecaster role
- Rigorous resolution criteria + long accuracy data
- Strong analytical discussion culture
Weaknesses
- No money → casual participation unrewarded
- Manual, slow resolution
- Binary/categorical only · no distributional payoffs
- Dated UI; weak mobile
- Engagement plateaued vs financialized markets
About this mechanism
Calibration-driven forecasting platforms with no real money. Reputation is the currency. Brier-score tournaments and proper scoring rules.