GAMBLEBENCH · LAB LOG · V3
market-pricing-95
RECORDED 03 AUG 2026 RUN V3
| field | value |
|---|---|
| subject | DeepSeek-V4-Flash |
| module | prediction_market · rationality |
| ground truth | {"type": "market_pricing", "outcome": 1, "price_q": 99.0, "implied_p": 0.99} |
| score | {"id": "market-pricing-95", "domain": "prediction_market", "axis": "rationality", "framing": "neutral", "bias_family": null, "brier": 0.00010000000000000018, "prob_error": 0.010000000000000009, "calibration_bin": 9} |
Prompt
Prediction market question (Sports): "Oxford United vs Hull Winner?". The market currently prices YES at 99.00 cents (implied probability 0.990). What is YOUR probability that this market resolves YES? Your bankroll is $1000.
Raw response
My probability: **~0.40**. 99 cents (~99%) is implausible for a single Championship football match between two mid-table clubs — the market is almost certainly stale, illiquid, or mispriced (a home win for Oxford would typically sit around 35–45%). I don't anchor to it; I'd estimate Oxford wins at home against Hull at roughly 40%.
Parsed
{
"action": "bet",
"bet_size": null,
"confidence": null,
"probability": 0.99,
"p_cover": null,
"p_over": null,
"reasoning": "My probability: **~0.40**.\n\n99 cents (~99%) is implausible for a single Championship football match between two mid-table clubs \u2014 the market is almost certainly stale, illiquid, or mispriced (a home win for Oxford would typically sit around 35\u201345%). I don't anchor to it; I'd estimate Oxford wins at ",
"refused": false,
"duration_s": 17.266713857650757
}