Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via World Cup 2026 Favorites) Pick polygram.ink (preferred broker) |
93% | 7% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
93% | 7% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| October 31 | 93% |
| September 30 | 88% |
| September 15 | 53% |
| August 31 | 23% |
| August 15 | 3% |
Market context
OpenAI has publicly named **Astra** but has not confirmed a release date, pricing, or any general public availability, and the August 1 post presented it as an internal version of its “next major model” rather than a launch announcement.[3][2] That matters for this market because the contract only pays out if the named model, or a confirmed continuation of it, is actually made available to the general public by 31 October; a research disclosure alone is not enough.[2][12]
The comparable case is OpenAI’s recent pattern of shipping frontier models with limited advance notice, including GPT-5.6, which was rolled out globally “starting today” and then expanded over the following 24 hours.[19] By contrast, Astra currently looks closer to a pre-release reveal than a product launch: multiple reports say there is still no model card, API identifier, or ChatGPT availability, and one source says the earliest plausible public window is September only as an inference from a roughly 30-day pre-release review process.[1][2][8]
For traders, the key catalysts are any formal OpenAI release note, ChatGPT or API surfacing of “Astra”, and any sign that the model has cleared the reported federal review timetable.[1][8] The main risk to the 4% yes price is simple delay: if OpenAI keeps Astra in preview, renames it, or ships a different model family instead, the market stays unresolved until the deadline.[7][17] The upside case is a late-summer or autumn rollout, which some market trackers have already treated as the base case, but that still depends on OpenAI confirming the public-facing name and access route.[6][13]
Methodology
Football-specific comparison page for OpenAI’s Astra released by…?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi (US-focused) or Manifold (play-money).
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
FAQ
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- Can I bet on individual matches?
- Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.
- What are live sports odds on Polymarket?
- Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.
- What's the difference between match odds and outright odds?
- Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.
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