GPT-5.6 released on 2026?

Platform comparison

Market context

Polymarket prices this contract at **0% YES**, and on the platform it settles through USDC on Polygon with conditional tokens that pay out only if OpenAI makes a product explicitly called GPT-5.6, or a qualifying direct successor variant, generally available by the settlement deadline. With the market effectively at the floor, traders are treating a further qualifying release as either already priced out or no longer expected before 2026-07-31T23:59:00Z.

The main comparator is the fast GPT-5.x cadence: GPT-5.5 arrived in April 2026, and multiple release trackers show GPT-5.6 moving from limited preview in late June to broad public availability on 9 July 2026, with OpenAI’s own page stating it was “available starting today across ChatGPT, Codex, and the OpenAI API”.[1][3][10] That matters because Polymarket contracts on named-model launches often move from uncertainty to near-certain settlement once OpenAI posts a rollout note or ships to product surfaces, especially when the same model is visible in ChatGPT, Codex, and the API rather than remaining in a partner-only preview.[1][3]

For traders, the catalysts to watch are straightforward: an OpenAI launch post, API documentation changes, ChatGPT model-picker updates, and any staggered rollout wording that confirms general availability rather than a restricted preview.[1][3][19] The key dependency is naming, not just capability; the market rules count task-specialised or cost-optimised variants only if they are recognised as part of the GPT-5.6 line, so a late-stage codename, tier label, or rollout name can still resolve this if OpenAI treats it as the successor family.[1][3]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.