GPT-5.6 released by 2026?

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Market context

OpenAI’s GPT-5.6 is tracking a late-June 2026 launch, with Polymarket pricing an 83–89% probability for a public release between June 22 and June 28, backed by over $960,000 in contract volume on USDC via Polygon. Despite this strong on-chain consensus, no official system card, API model string, or public announcement from OpenAI has confirmed the date as of mid-June 2026. The market resolves to “Yes” only if the model explicitly named GPT-5.6—or a direct successor to GPT-5.5—is made available to the general public before the settlement deadline of 2026-07-31.

Historically, OpenAI’s flagship releases follow a tight six-week cadence: GPT-5.4 arrived on 5 March 2026, GPT-5.5 on 23 April, and GPT-5.6 is now expected in late June, mirroring the progression from GPT-5.1 to GPT-5.2. Past launches, including GPT-5.5, have followed a staged rollout—first in ChatGPT and Codex, then in the API the following day. A backend identifier for GPT-5.6 has already surfaced in Codex routing logs, suggesting the model is in late-stage preparation, though The Information reported on 10 June that OpenAI chief scientist Jakub Pachocki described it as a “meaningful improvement” without confirming a date.

Traders should monitor three key catalysts: an official OpenAI announcement, the appearance of a GPT-5.6 model ID in the public API, and updates to Codex backend logs. The Information’s 10 June report on Pachocki’s comments provides the strongest pre-launch signal outside official channels, while WaveSpeed AI noted on 13 May that Polymarket had priced an 89% chance of a June 30 release. Developers should pin to the explicit `gpt-5.5` endpoint to avoid silent rollouts, and watch the API model list for the first quiet appearance of GPT-5.6. Until an official system card lands, the market remains a high-probability bet on community expectations rather than confirmed fact.

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

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

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 Scam??

Zero. Polymarket Scam? 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.