When will GPT-5.6 be released?

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Active sub-markets

Market context

The real-world event is the public release of OpenAI’s GPT-5.6 model, currently unannounced but tracked by leaks and prediction markets. As of 21 June 2026, no official OpenAI announcement, system card, or API model string exists for GPT-5.6, though a backend identifier appeared in Codex rollout infrastructure[1][3]. Historical precedent shows OpenAI rarely pre-announces flagship releases; GPT-5.5 launched on 23 April 2026 without prior public confirmation, becoming available in the API the day after its ChatGPT debut[1][4]. Before the June window slipped, Polymarket traders assigned 83% probability to a 22–28 June launch, backed by $960,325 in contract volume[1][2]. Since that window passed, odds collapsed to ~18%, with markets now pricing a July 2026 release as the most likely outcome (~94% by end of July)[2].

A trader should monitor three catalysts: an official OpenAI blog post or system card, a new model string in the API, and a ChatGPT update note. The Information reported on 10 June that chief scientist Jakub Pachocki described GPT-5.6 as a “meaningful improvement” over GPT-5.5, suggesting late-stage preparation[1][4]. Recent updates confirm the June window has slipped, pushing the realistic expectation to July 2026, with a 1.5 million token context window and improved agentic reliability as key features[2][4]. Programmatically, one would query the OpenAI API for model strings matching “gpt-5.6”, poll the ChatGPT help centre for new model notes, and track Polymarket volume shifts as leading indicators. Nothing requires action before an official announcement; GPT-5.5 remains the current production model[1][2]. When GPT-5.6 launches, expect a staged rollout starting with ChatGPT and Codex before broader API availability, mirroring the GPT-5.5 pattern[1].

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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'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 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.