Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via PolyGram) Pick polygram.ink (preferred broker) |
92% | 8% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open the market → |
Polymarket (direct) polymarket.com |
92% | 8% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open the market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open the market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open the market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open the market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| August 21 | 92% |
| August 14 | 81% |
| August 13 | 42% |
| August 12 | 17% |
| August 7 | 0% |
| August 11 | 0% |
Market context
SpaceX's xAI division has not yet released Grok 4.6 to the general public as of early 2025. The prediction market currently prices this outcome at 0%, reflecting the absence of any announced timeline or public availability for a model bearing that specific designation. Settlement hinges on whether a product explicitly named Grok 4.6—or a direct successor variant such as Grok 4.75—reaches general users by mid-August 2026. Task-specialised models and efficiency variants would qualify, though a jump to Grok 5 would not.
xAI's release cadence offers limited historical precedent. Grok 1 launched in November 2023 as an early access product; Grok 2 followed in August 2024 with broader availability. The progression from Grok 4.4 to 4.5 occurred within months rather than years, suggesting that if xAI maintains momentum, a 4.6 iteration could plausibly emerge within the settlement window. However, the company has not committed publicly to a versioning roadmap, and Elon Musk's statements on xAI development priorities have emphasised reasoning capabilities and real-time information integration over predictable release schedules.
Traders should monitor xAI announcements, Musk's X posts regarding model development, and any statements from xAI leadership at industry conferences. The timeline to August 2026 allows roughly eighteen months for development and deployment. Conditional token mechanics on Polygon mean positions can be hedged or exited as new information surfaces, though the current 0% pricing suggests the market assigns substantial uncertainty to whether xAI will label and release a 4.6-generation product rather than skip directly to a higher version number or pursue alternative naming conventions.
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
FAQ
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- What's the difference between YES and NO shares?
- A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
- How reliable are the quoted odds?
- The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
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