Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) Pick polygram.ink (preferred broker) |
99% | 1% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
99% | 1% | 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 |
|---|---|
| December 31 | 99% |
| October 31 | 98% |
| August 31 | 95% |
| July 31 | 85% |
| July 24 | 48% |
| July 22 | 4% |
| July 17 | 0% |
| July 16 | 0% |
Market context
Anthropic’s next Claude Opus model is expected to reach general public availability before the end of 2026, with the crowd assigning a 95% YES probability to this outcome. The last confirmed Opus release, Claude Opus 4.8, launched on 28 May 2026, and since then the company has not officially named its next flagship, though a point-bump Opus refresh is widely anticipated as the most likely next move [1][3].
Historically, Anthropic has maintained a flagship cadence of roughly six to eight weeks between major releases, making a delay beyond late 2026 unusual unless disrupted by external factors. The suspension of Fable 5 and Mythos 5 in June 2026 due to a US export-control directive introduced a rare pause, but analysts expect the restoration of those models alongside an Opus update within weeks rather than months [3]. This pattern supports the high implied probability, as past delays have typically been short and resolved without halting the flagship pipeline.
Traders should monitor Anthropic’s official announcements for any confirmation of an Opus variant, particularly following the anticipated restoration of the suspended Mythos-class models. A safeguarded general release of Mythos-class models could run parallel to an Opus refresh, and any delay in that restoration might signal broader timeline risks [3]. With no confirmed next model named as of late June, the absence of a formal roadmap remains the key uncertainty, but the consistent release rhythm suggests the 95% consensus is well-founded, with limited value in betting against the favourite unless export or regulatory shocks re-emerge.
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 Who Will Win, which mirrors the Polymarket order book directly.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
- 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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