Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Tax UK) 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 | 87% |
| September 15 | 49% |
| August 31 | 22% |
| August 15 | 4% |
Market context
OpenAI has publicly disclosed Astra, but the market turns on a narrower question: whether the model is actually released to the general public, under that name or a confirmed successor branding, before the October deadline. The current 4% crowd-implied price reflects a position where announcement risk is largely priced in, while the public-launch step remains unconfirmed and, so far, unattached to a firm date.[2][4][15]
For context, comparable OpenAI model launches have often followed a pattern of internal testing, public preview, and then a naming decision that can shift at the last moment, which is why traders should not read “next major model” as a release commitment.[2][17][18] The cited reporting also points to a possible federal pre-release review of roughly 30 days for frontier models, which, if applicable, creates a procedural delay rather than an immediate launch path; that is inference from reporting, not a published OpenAI timetable.[1][6] In market terms, the headline probability is low because there is still no model card, API endpoint, pricing page, or announced release date.[4][15]
The main catalysts are straightforward: an official OpenAI launch post, a public API or ChatGPT availability notice, or a naming clarification that explicitly ties a shipped model to the August announcement. Traders should also watch whether the company discloses that Astra is moving through a federal review process, since that could push availability closer to late September or October rather than August.[1][6] For access, “no-KYC up to $1,500” means a trader can usually take part with only light identity checks until cumulative activity crosses that threshold, which affects how easily smaller users can enter this market, but not how the event itself resolves. In Germany, GlüStV treatment may matter because offshore prediction markets can face gambling-law scrutiny; in the US, CFTC reach is relevant because event contracts tied to public developments can attract regulatory attention depending on venue and structure.
Methodology
This overview of OpenAI’s Astra released by…? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.
Resolution & payout
On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.
UK Frequently Asked Questions
- Is Polymarket legal in my country?
- Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Polymarket Tax UK has a different geo footprint.
- Is Polymarket regulated by the UKGC?
- No. Polymarket is not licensed by the UK Gambling Commission (UKGC). It is a decentralised prediction market operated under US regulation. UK traders can use it but do not benefit from UKGC dispute resolution or player protection requirements.
- What are the HMRC tax rules on Polymarket profits for UK traders?
- Polymarket profits are treated as cryptocurrency disposal events by HMRC. Each USDC settlement is a taxable event subject to Capital Gains Tax (CGT). For 2026/27, the CGT rate is 18% (basic rate) or 24% (higher rate). The annual CGT exemption is £3,000. Report via HMRC Self Assessment if your total crypto gains exceed £3,000 or proceeds exceed £50,000.
- Does Polymarket KYC apply to UK users?
- Yes. Polymarket requires KYC (Know Your Customer) verification for all users, including UK residents. You must provide a government-issued photo ID and a selfie. The process typically takes 5–10 minutes via their ID verification provider.
- What is the legal difference between Polymarket and Betfair Exchange for UK traders?
- Betfair Exchange is UKGC-licensed, meaning UK consumer protections apply and winnings are typically tax-free. Polymarket is not UKGC-licensed — it operates under decentralised blockchain rules. Profits from Polymarket are subject to HMRC CGT as crypto disposals. Choose based on your regulatory preference and tax situation.
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