GPT-5.6 released by 2026?

Platform comparison

Active sub-markets

Market context

The real-world event driving this market is OpenAI’s imminent public release of GPT-5.6, a flagship model confirmed by its chief scientist as a meaningful improvement over GPT-5.5, with backend identifiers already visible in Codex infrastructure despite no official system card or API string yet published[1][2].

Historical release patterns show OpenAI advancing its GPT-5 generation roughly every six weeks—GPT-5.4 in March, GPT-5.5 in April, and GPT-5.6 now tracking for late June—mirroring the staged rollout of GPT-5.5, which appeared in ChatGPT before API access[2][3]. This cadence, combined with Polymarket’s 83–89% probability pricing for a June 22–28 launch backed by over $1M in contract volume, frames the current 0% crowd-implied probability as a significant outlier against strong pre-launch consensus signals[1][2].

Traders should monitor OpenAI’s API model list for the first quiet appearance of GPT-5.6, alongside any official system card or Codex update, as these typically precede broader public availability[1][4]. Recent reporting from The Information notes chief scientist Jakub Pachocki described the model as a meaningful improvement, suggesting late-stage preparation, though OpenAI has not confirmed a date publicly[1]. Regulatory accessibility remains constrained by German GlüStV licensing requirements and US CFTC oversight, but the “no-KYC up to $1,500” threshold allows limited participation for non-verified users, expanding market reach without compromising legal compliance under current frameworks.

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Legal UK?

Zero. Polymarket Legal 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.

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.