GPT-5.6 released by 2026?

Platform comparison

Active sub-markets

Market context

OpenAI has officially rolled out GPT-5.6 to enterprise partners this Friday, yet the Trump administration has mandated a restriction on general public access, delaying the wider launch until the vetting process concludes in early July. This regulatory bottleneck directly contradicts the current 0% crowd-implied probability on the "GPT-5.6 released by..." market, which fails to account for insider reports confirming the model is already live in Codex backend routing logs and that a general release is planned within weeks.

Historical precedents from the GPT-5.1 to GPT-5.5 progression reveal a consistent six-week flagship cadence, with GPT-5.4 arriving in March and GPT-5.5 in April, suggesting GPT-5.6’s late June or early July timing aligns perfectly with established patterns. While platforms like Polymarket show trading volume exceeding $1M with implied probabilities of 83–89% for the June 22–28 window, books such as Kalshi and Betfair diverge significantly by offering decimal odds rather than implied probabilities and enforcing stricter KYC requirements that limit retail participation.

Traders must monitor OpenAI’s official blog and API documentation for the formal announcement of the general release, which is expected in the second week of July according to recent insider briefings. The primary dependency remains the US government’s case-by-case approval of customer access, a variable that could extend the delay if the vetting process exceeds the projected 30-day window. Recent coverage by Axios confirms the restriction is government-led, not a technical failure, meaning the settlement window ending 2026-07-31 remains highly relevant for a potential "Yes" resolution.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read GPT-5.6 released by 2026? 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). PolyGram 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 PolyGram, 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.

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 PolyGram?

Zero. PolyGram 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.