When will GPT-5.6 be released?

Platform comparison

Active sub-markets

Market context

OpenAI’s next public model release is the event to watch here, and the market is effectively asking whether a model explicitly called GPT-5.6, or a recognised successor in that naming line, appears before the settlement cut-off. The current 0% crowd-implied price on the market is far below the late-June expectations in the broader contract set, so it should be read as an outlier rather than a neutral base case.

The main precedent is OpenAI’s recent short-release cadence. Coverage in late spring described GPT-5.4 on 5 March and GPT-5.5 on 23 April, with GPT-5.6 then expected in June, implying roughly six-week spacing between successive flagship bumps.[1] OpenAI’s own release notes also show frequent incremental updates to GPT-5.5 Instant in late May, which matters because markets often price the step from internal iteration to a public version-number change badly until the official naming lands.[7] Kalshi’s comparable market resolves if OpenAI releases GPT-5.6 or greater before 30 June and is explicit that public access outside a closed beta is required, whereas Polymarket contracts typically trade as implied probabilities and price the same event through a different fee structure and user base.[4]

The key catalysts are official announcement timing, release-note updates, and any product-page or API routing changes that confirm the model name. Recent reporting said OpenAI chief scientist Jakub Pachocki described GPT-5.6 as a “meaningful improvement” and placed it in late June, which keeps the June window live even without a formal launch post.[1][6] Traders will also watch for signs in developer tooling and deployment logs, because the model name has already surfaced in backend routing chatter, a pattern that can precede a public rollout.[2] Market interpretation also differs by venue: Polymarket prices directly in percentage terms, while Betfair and Smarkets usually frame the same question via decimal odds, with KYC access and customer eligibility varying by book.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read When will GPT-5.6 be released? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). Kalshi Alternative UK routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Where can I trade this market with the lowest fees?

On Kalshi Alternative 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.

Is this market available outside the US?

Kalshi Alternative UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 Kalshi Alternative UK?

Zero. Kalshi Alternative 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, Kalshi Alternative UK triggers a quick verification flow that finishes in minutes.