Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
92% | 8% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
92% | 8% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| August 21 | 92% |
| August 14 | 81% |
| August 13 | 43% |
| August 12 | 22% |
| August 7 | 0% |
| August 11 | 0% |
Market context
Grok 4.6 has been framed publicly as the next step after Grok 4.5, with Elon Musk posting that it should arrive “around August 7” and later saying it was due “next week”, but xAI has not published a formal general-availability notice or model card.[14][11][17] That matters for resolution, because this market pays only if the model is made available to the general public by the deadline, not merely mentioned, previewed, or surfaced in a closed API route.[2][8]
The historical read-through is mixed. xAI has shown a habit of compressing release windows between successive Grok iterations, and some community write-ups treat 4.6 as a natural follow-on to the July 8 Grok 4.5 launch, which would support a near-term shipment narrative.[10][16] On the other hand, several reports as of late July said 4.6 was still not publicly available and lacked public pricing, context window, or an official catalog entry, which is a reminder that Musk’s timeline posts have sometimes been directional rather than binding launch notices.[2][8][17]
For traders, the key catalysts are a direct xAI announcement, an API/model-catalog update, or a public product rollout inside X or related partner surfaces before the deadline.[2][8] The main risk to a Yes is a slippage from a target date into a later August window, because even a visible demo, benchmark claim, or restricted access release would not necessarily satisfy general-public availability under this market’s wording.[2][11]
Methodology
Sports-specific comparison page for Grok 4.6 released by 2026?. 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 or Manifold.
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.
UK Frequently Asked Questions
- 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.
- 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.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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