When will GPT-5.6 be released?

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Market context

OpenAI has not publicly released GPT-5.6 yet, so the settlement question is whether a model explicitly named GPT-5.6, or a recognised successor such as GPT-5.7 or GPT-5.8, appears before 28 June 2026. The market is effectively pricing the timing of a product launch, not a benchmark rumour, so the most useful approach is to track public rollout artefacts rather than chatter: API model lists, ChatGPT model pickers, release notes, and Codex routing changes. OpenAI’s last confirmed flagship step was GPT-5.5, which went live in ChatGPT, Codex, and the API in late April 2026, with a May 28 update to GPT-5.5 Instant noted in the release notes[6][8].

Historical cadence matters because OpenAI has been moving through the GPT-5 line quickly. Publicly documented launches show GPT-5 in August 2025, GPT-5.1 in November 2025, GPT-5.2 in December 2025, GPT-5.4 in March 2026, and GPT-5.5 in April 2026[3][6][7]. That sequence supports a short-cycle reading of the current price: if the product team continues shipping on a roughly six-week rhythm, a June release is plausible; if the company pauses for safety review, integration work, or a broader ChatGPT refresh, the window can slip quickly[1][3].

For a programmatic trader, the key catalysts are public, machine-readable changes: a new model ID in OpenAI’s API index, a release note or help-centre entry naming GPT-5.6, or a ChatGPT/Codex rollout that exposes the version before the announcement page lands[2][4][8]. Recent reporting has also pointed to a June launch plan and described GPT-5.6 as a “meaningful improvement”, while secondary coverage notes a Codex backend routing entry for “kindle-alpha” as an early sign to watch[1][4]. In practice, the safest automation is to poll release notes and model endpoints, then trigger only when the exact name appears, because task-specific variants and API-only rollouts can still count if they are branded as GPT-5.6 or a direct successor[2][4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket App UK, which mirrors the Polymarket order book directly.

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on Polymarket App UK?

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Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket App UK triggers a quick verification flow that finishes in minutes.