GPT-5.6 released on 2026?

Platform comparison

Market context

The real-world event at hand is the date OpenAI makes its GPT-5.6 model generally available to the public, not merely the announcement of the preview. In prediction markets, a YES share profits if the model is released by the settlement deadline, while a NO share wins if it is not released or is delayed beyond that point. This specific market resolves on the Eastern Time date of general availability, with the settlement window closing on 31 July 2026.

Historical rollout patterns for OpenAI’s major models show a consistent gap between preview announcements and broad public access. GPT-5.5 was previewed on 23 April 2026, with general API access confirmed the following day, yet full ChatGPT availability took weeks. Similarly, GPT-5.6 was previewed on 26 June 2026, with OpenAI stating it will become generally available in the coming weeks, typically meaning two to six weeks for frontier launches. This timeline aligns with the current crowd-implied probability of 0% YES, as the market anticipates release before the deadline but treats the precise date as uncertain until official confirmation.

Traders should monitor OpenAI’s newsroom for formal general availability announcements, particularly any updates regarding ChatGPT, Codex, or API access for non-partner users. Recent previews confirm that GPT-5.6 Sol, Terra, and Luna will launch together across all three platforms once general availability begins, with API model IDs expected to activate first for paying developers. OpenAI’s official preview post explicitly states that broader access is planned soon, with the earliest reasonable US-wide general availability estimated between 10 and 17 July 2026, suggesting the market will likely resolve YES before the settlement deadline.

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Methodology

This page reviews GPT-5.6 released on 2026? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Market UK, which mirrors the Polymarket order book at 0% fees.

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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.