GPT-5.6 released by 2026?

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Active sub-markets

Market context

The real-world event is OpenAI’s imminent public release of GPT-5.6, a flagship model confirmed by its chief scientist as a meaningful improvement over GPT-5.5, with backend identifiers already visible in Codex rollout logs and a late-June launch window widely anticipated by traders [1][2]. Despite this strong pre-launch consensus, the current crowd-implied probability of 0% YES on the prediction market for a release before July 2026 appears disconnected from the technical reality that the model is in late-stage preparation, not theoretical development [1][4].

Historically, OpenAI has followed a roughly six-week flagship cadence—GPT-5.4 in March, GPT-5.5 in April, and GPT-5.6 now tracking for late June—while often surfacing canary identifiers in backend logs before official announcements, as seen with GPT-5.6’s appearance in Codex routing entries [2][4]. This pattern suggests that a 0% probability is an outlier compared to past release cycles, where community signals like Polymarket’s 83–89% pricing for a June 22–28 window consistently preceded formal confirmations [1][2].

Traders should monitor Codex update logs for the first public version-bump, await any official OpenAI system card or API model string, and watch for announcements tied to the planned ChatGPT overhaul that GPT-5.6 is expected to power [1][2]. The Information reported on June 10 that chief scientist Jakub Pachocki described the model as a meaningful improvement, indicating late-stage readiness, though no public date has been confirmed [1]. With the settlement window ending July 31, 2026, the market’s current pricing ignores the compressed timeline driven by both capability upgrades and alignment corrections post-goblin incident [1][4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Is this market available outside the US?

Polymarket App UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 does it cost to trade on Polymarket App UK?

Zero. Polymarket App UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

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.