GPT-5.6 released on 2026?

Platform comparison

Market context

OpenAI has effectively launched GPT‑5.6, with the flagship Sol variant announced on 26 June 2026, though general public access remains pending as the rollout is currently limited to trusted API and Codex partners. The market’s current 0% YES probability reflects a mismatch between the announcement date and the settlement criteria, which require broad availability to the general public outside a closed beta, a milestone OpenAI has not yet confirmed with a specific date.

Historical precedents from GPT‑5.5’s launch in April 2026 show that OpenAI typically stages releases, granting API access to partners first before enabling ChatGPT and public API access days or weeks later. Polymarket traders previously assigned an 83% probability to a late‑June window, betting on the announcement, but the distinction between a preview and general availability has kept the “released to the public” condition unmet, mirroring how earlier models resolved only after the ChatGPT interface became live for all users.

Traders should monitor OpenAI’s official newsroom for a general‑availability announcement, as the current preview excludes individual consumers and ChatGPT users. Key catalysts include the planned expansion of access to ChatGPT, Codex, and the public API, which OpenAI stated will occur “in the coming weeks” following the June 26 preview. Until a verified date for broad public access is published, the contract remains unresolved, with no action required before an official announcement confirms the model’s general availability.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

What does a transaction cost on Polygon?

Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

How volatile are crypto prediction markets?

Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.

Which crypto markets exist on Polymarket?

Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.