Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legit) Pick polygram.ink (preferred broker) |
85% | 15% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
85% | 15% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| December 31, 2026 | 85% |
| September 30, 2026 | 56% |
| August 31, 2026 | 14% |
| August 21, 2026 | 3% |
| July 31, 2026 | 0% |
| December 31, 2025 | 0% |
| March 31, 2026 | 0% |
| August 7, 2026 | 0% |
| August 14, 2026 | 0% |
| June 30, 2026 | 0% |
Market context
OpenAI would need to make GPT-6 publicly available by 31 December 2025 for this market to pay out Yes, but the available record points the other way: OpenAI had already indicated in October 2025 that GPT-6 would not ship in 2025, and later reporting says the model that many expected to become GPT-6 was released on 23 April 2026 as GPT-5.5 instead.[13][11] On that reading, the current 0% crowd-implied probability reflects a deadline that has already passed with no qualifying release, rather than a live launch race.
For traders, the closest comparables are previous OpenAI roll-outs that arrived first as renamed or tiered releases, then widened access later. That matters because this market only settles Yes if the model is explicitly GPT-6 and is accessible to the general public; a closed beta, partner preview, or private testing phase would not count.[11][13] In practice, markets like this are often read through the lens of naming, access scope, and timing, not just whether a frontier model exists internally.
The main catalysts are any OpenAI announcement posts, release notes, or schedule comments that name GPT-6 directly and confirm public availability before year-end. A recent release-note trail shows OpenAI often documents model changes after launch, so the market would likely move on an explicit product announcement rather than on inference from rumours or infrastructure chatter.[7][8] From a regulatory and access standpoint, German GlüStV issues are relevant because prediction markets can fall into gambling-style regulation depending on local classification, while US CFTC reach is a separate question if a venue offers event contracts to US persons; “no-KYC up to $1,500” generally means low-friction access below that threshold, but it does not remove jurisdictional restrictions or change the settlement rule for this specific market.
Methodology
This overview of GPT-6 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.
FAQ
- 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. Is Kalshi Legit has a different geo footprint.
- How are winnings taxed?
- Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legit stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.
- Are prediction markets gambling?
- Legally unclear in most jurisdictions. Some interpretations classify them as wagering (gambling regulation applies), others as derivatives (financial regulation applies). There's no global precedent specifically for on-chain prediction markets.
- Is there a withdrawal cap?
- No platform-side cap. You can withdraw any amount provided KYC is complete. SEPA bank withdrawals over €15,000 trigger additional anti-money-laundering checks (statutory obligation for all platforms).
Trade GPT-6 released by…? on Is Kalshi Legit
Live order book, 0% fees, USDC settlement in seconds.
Open live market →