GPT-5.6 released by 2026?

Platform comparison

Active sub-markets

Market context

The real-world event is OpenAI’s imminent launch of GPT-5.6, a flagship model described by chief scientist Jakub Pachocki as a “meaningful improvement” over GPT-5.5, with a backend identifier already visible in Codex rollout logs despite no official announcement or system card as of mid-June 2026[1][2].

Historical precedent frames how to read the current 0% crowd-implied probability: tech firms often delay public confirmation until internal testing is complete, yet Polymarket traders have assigned 83–89% odds to a late-June release based on over $1M in contract volume, mirroring how Eurovision splits voting between jury and televote or how Oscars use preferential ballots to capture nuanced consensus before formal results[1][2]. The pattern from GPT-5.4 (March) to GPT-5.5 (April) to GPT-5.6 (June) shows a consistent six-week flagship cadence, suggesting the market’s 0% rating reflects caution rather than disbelief[2].

Traders should watch for an official OpenAI announcement, a system card, or a version bump in Codex logs, as GPT-5.5 became API-available the day after its ChatGPT launch, and GPT-5.6 is expected to follow the same staged rollout[1][2]. The Information reported on June 10 that Pachocki confirmed the model’s readiness, while Polymarket’s pricing signals remain the strongest pre-launch consensus outside official channels[1][2]. No action is required before an official release, but the backend identifier and community betting volume strongly indicate active development nearing completion[1][4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), 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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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.