Playground
Calibration Dojo
Train probabilistic intuition. Binary forecasting questions at any confidence level; track Brier score + reliability curve over time. Browser-only. Free.
- Inputs
- Paste + configure
- Runtime
- 1–15 s
- Privacy
- Client-side · no upload
- API key
- Not required
- Methodology
- Open →
Brier score
—
Lower is better · perfect calibration = 0.000 · uniform random 50% = 0.250
Resolution: — · 0 answered · stored locally only
1 · Read the statement
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Reliability curve
Dot size ∝ number of answers in that decile. Diagonal = perfect calibration.
History persists in your browser's localStorage only.
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