Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Alternative) Pick polygram.ink (preferred broker) |
93% | 7% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open the market → |
Polymarket (direct) polymarket.com |
93% | 7% | 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 |
|---|---|
| October 31 | 93% |
| September 30 | 88% |
| September 15 | 53% |
| August 31 | 23% |
| August 15 | 3% |
Market context
OpenAI has already said that Astra exists and is its “next major model”, but there is still no official public release date, API listing, or pricing page, so the market is really pricing the gap between announcement and availability rather than the existence of the model itself.[5][13][18] That makes the current 4% crowd-implied probability look consistent with a “prove-it” stance: the name is public, yet the qualifying event here only resolves Yes if Astra, or a clearly confirmed successor under the same model, is actually released to the general public by the deadline.[2][5]
Comparable OpenAI launches have often been preceded by a long period of internal testing and branding uncertainty, with the company sometimes changing family names or folding systems into an existing line rather than shipping exactly as first described.[6][17][18] For platform readers, Polymarket-style quoting shows the event as a direct implied probability, while Betfair, Smarkets and similar books typically surface the same view through decimal prices and take commission differently, so the headline number can look less generous once fees are included. Public trackers currently place the probability far higher for an autumn release than for an August one, which helps explain why the very near-term side still sits at low single digits.[7][8]
The main catalyst is whether OpenAI issues a launch post, a ChatGPT integration note, or an API changelog before 31 October; absent that, the market will keep trading on inference from the August announcement and any later product or policy updates.[1][4][8] One reported constraint is a roughly 30-day federal pre-release review process that would push the earliest plausible window into September if it applies as described, but OpenAI has not confirmed the timing, so that remains a trading inference rather than a binding schedule.[1][8] KYC and access can also matter here: Polymarket and offshore books may be available to different user pools than Betfair or Smarkets, so the same event can attract different liquidity and pricing across venues.
Methodology
We read OpenAI’s Astra released by…? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.
Resolution & payout
Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.
FAQ
- Polymarket vs Kalshi — which is better?
- Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.
- Which platform has the deepest liquidity?
- Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.
- Is Betfair a Polymarket alternative?
- Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.
- Which platform is accessible globally?
- Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Polymarket Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.
- Are all these platforms regulated?
- No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.
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