When will GPT-5.6 be released?

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Market context

OpenAI’s next public model release is the event to watch, and the current market is pricing a surprisingly firm bet that it lands before the end of June. The strongest public signal is still indirect: reporting says OpenAI plans to ship GPT-5.6 this month and that chief scientist Jakub Pachocki described it as a “meaningful improvement” over GPT-5.5, which matters because markets usually move only when a named release has been tied to a concrete window.[1][7]

For context, recent OpenAI launches have shown a fairly brisk cadence, with GPT-5.5 arriving in late April and subsequent rollout notes showing continued iteration on the 5.x line rather than a pause for a wholly new flagship.[8] That matters for reading the 0% crowd-implied probability: if the market definition counts GPT-5.6 or a direct successor, then traders are effectively pricing whether OpenAI keeps the numbered-series rhythm into late June, rather than waiting for a larger reset. Under German GlüStV rules, access to a prediction market can be treated differently depending on whether it is seen as gambling-like or informational; for a US-facing venue, CFTC reach can also matter where event-contract design or distribution touches US persons. “No-KYC up to $1,500” here means smaller positions may be accessible without identity verification, but only up to the platform’s stated threshold and subject to compliance checks.

The immediate catalysts are straightforward: an OpenAI blog post, model release notes, or a ChatGPT/API model-picker update would be the clearest trigger, while backend hints such as Codex routing logs have already been cited by trackers watching for a public bump.[1][3] Traders will also watch whether OpenAI prioritises safety documentation and staged rollout messaging, because those often accompany model launches and can shift the effective release date by a day or more.[8] With the settlement window ending 2026-06-28, any late-June announcement, limited rollout, or renamed successor would be the key event to parse against the market’s definition.[2][8]

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

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?

On Polymarket Tax UK, which mirrors the Polymarket order book at 0% fees. 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 does it cost to trade on Polymarket Tax UK?

Zero. Polymarket Tax UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Tax 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.