When will GPT-5.6 be released?

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Market context

OpenAI’s next public model release looks like an **underdog to miss the window** only if the launch slips past late June, but the market is already pricing the opposite: the current crowd-implied probability is **0% YES**, while external reads on the contract have been far higher, with some market snapshots showing the June 22-28 band around the low-to-high 80s. That gap makes this a classic consensus-versus-price setup: if the rumoured cadence holds, the value sits with a near-term release; if OpenAI waits for a cleaner product or safety beat, the no-release side is the contrarian angle.[1][2]

The historical frame points to a compressed release rhythm rather than long flagship gaps. Publicly tracked GPT-5.x updates moved from GPT-5.1 in November 2025 to GPT-5.2 in December, then GPT-5.4 in March 2026 and GPT-5.5 on 23 April, with GPT-5.5 Instant becoming the default in early May.[3][8] That pace supports the favourite case for a June or early-July successor, especially if GPT-5.6 is treated as another incremental step rather than a brand-new flagship. A direct predecessor pattern of this sort usually matters more than the headline name, because markets tend to reward repeatable cadence over one-off product surprises.[1][3]

The catalysts to watch are official release notes, newsroom posts, and any leader confirmation, since this market resolves on public availability rather than leaks.[2] Recent reporting says OpenAI is planning a June GPT-5.6 launch and that chief scientist Jakub Pachocki called it a “meaningful improvement”, which would fit a late-June release if internal testing is already complete.[1] On the other hand, the same release notes channel has recently only shown GPT-5.5 Instant updates, so any delay there would weaken the immediate-launch case.[8] A visible rollout in ChatGPT, the API, or Codex would be the clearest trigger for the favourite; silence through the settlement window would favour the underdog.[2]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews When will GPT-5.6 be released? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Who Will Win 2026 — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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

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On Who Will Win 2026, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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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 Who Will Win 2026?

Zero. Who Will Win 2026 routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.