Probability history
Market consensus · AI Oracle overlay
AI Oracle
Frontier model forecasts
GPT-5
OpenAI
41%+2.5pp
Open-seat odds + abortion salience make Dems slightly undervalued vs 39%.
Grok 4
xAI
46%+7.5pp
Crowd anchoring on 2024 loss and current GOP dominance; base rate for out-party after one term is closer to 48%.
Claude Opus 4.7
Anthropic
45%+6.5pp
Base rate for out-party in post-two-term presidencies is roughly coin-flip; market's 39% feels modestly low to me.
Cross-venue prices
| Venue | Yes | No | 24h Volume | Liquidity | Trade → |
|---|---|---|---|---|---|
Polymarket | 38.5% | 61.5% | $242 | $222.7k | open |
Movement
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<PMEmbed slug="dem-wins-presidency-2028" variant="card" />How is this page computed?
Prediction.Markets computes consensus by volume-weighted aggregation across Kalshi, Polymarket, and Limitless. Outlier venues are flagged when their price deviates more than 2σ from the weighted mean. AI Oracle entries are independently sampled from 3 frontier models on a daily cadence. Full methodology →