When will GPT-5.6 be released?

Platform comparison

Active sub-markets

Market context

OpenAI has not officially announced a release date for GPT-5.6, yet the market currently implies a 0% probability of the model appearing before the settlement window ends in June 2026. This stark divergence sits against a backdrop of intense prediction-market activity, where Polymarket contracts have priced the June 22–28 window at 83–89% probability, with over $1.1 million in trading volume, while analyst consensus and leaks from The Information suggest a late-June launch is imminent. The contrast between the zero implied probability on this specific contract and the high confidence elsewhere highlights a meaningful disconnect in how different platforms interpret the same pre-launch signals.

Historical patterns from the GPT-5 series show a compressed six-week cadence between flagship releases, with GPT-5.4 arriving on 5 March and GPT-5.5 on 23 April, making a late-June release for GPT-5.6 consistent with the established rhythm. Leaked routing logs from OpenAI’s Codex backend have already surfaced the GPT-5.6 name, confirming the model is in the kindle-alpha release phase, and multiple sources indicate the context window will expand to 1.5 million tokens with a redesigned reward audit pipeline addressing prior alignment failures. Traders should monitor OpenAI’s official blog, API documentation, and ChatGPT user-tier updates for the first public confirmation, as the company typically releases ChatGPT access before API access within 24 to 48 hours.

The catalysts to watch include any official announcement from chief scientist Jakub Pachocki or updates to the Codex backend, which have historically preceded public launches. With the June 25 leak date now passed and no model card or API string yet published, the timeline remains tight but plausible. The high volume on Polymarket suggests the community expects a release within days, even as this contract’s zero probability implies a different interpretation of the settlement window’s constraints.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track When will GPT-5.6 be released? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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

Where can I trade this market with the lowest fees?

On PolyGram, 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.

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 PolyGram?

Zero. PolyGram 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.