GPT-5.6 released by 2026?

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Active sub-markets

Market context

The real-world event is OpenAI’s imminent public release of GPT-5.6, a flagship model confirmed by chief scientist Jakub Pachocki as a meaningful improvement over GPT-5.5, with backend identifiers already visible in Codex rollout logs and a launch window narrowing to late June 2026[1][2]. Despite no official system card or API string yet, prediction markets have priced a June 22–28 release at 83–89% probability, backed by over $1M in contract volume[2][4].

Historically, OpenAI has followed a compressed six-week flagship cadence since GPT-5.1, with GPT-5.4 released in March and GPT-5.5 in April, making GPT-5.6’s late-June timing consistent with prior patterns[2][3]. The current 0% crowd-implied probability on Polymarket for public availability by July 2026 appears disconnected from this trajectory, especially given that GPT-5.5 became the default in ChatGPT within weeks of its April launch[3]. Traders should watch for an official OpenAI announcement, a new system card, and Codex API version updates—signals that typically accompany flagship releases[1][4]. The Information reported on June 10 that Pachocki described the model as ready for staff, suggesting late-stage preparation[1].

Programmatically, this market is best approached by monitoring Codex backend logs for version bumps and tracking Polymarket volume shifts as the June window closes[2][4]. A release before June 30 would resolve the market to “Yes,” while any delay beyond July 2026 would trigger “No.” Given the alignment correction and capability upgrades compressed into this cycle, the technical groundwork is already in place, and the public rollout is likely imminent[1][2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track GPT-5.6 released by 2026? 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

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What does it cost to trade on Polymarket Review UK?

Zero. Polymarket Review UK 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Review UK triggers a quick verification flow that finishes in 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.