GPT-5.6 released on 2026?

Platform comparison

Market context

OpenAI has announced GPT-5.6 Sol on 26 June 2026, yet a full public launch remains deferred at the US government’s request, limiting initial access to a small group of vetted partners [3]. The model is not available in ChatGPT during this preview, with broader availability for ChatGPT, Codex and the API planned only in the coming weeks [4][6]. This creates a clear gap between announcement and general release, a pattern that directly explains why the current crowd-implied probability sits at 0% for a release before the settlement window ends in July 2026.

Historically, model releases have frequently been delayed by regulatory scrutiny or internal safety audits, as seen with GPT-5.5’s own compressed cycle following the goblin incident [2]. Markets have been wrong about release dates many times this year, often overestimating speed despite technical dependencies like reward-model retraining and data contamination checks [2]. Traders should watch for Codex backend log updates, which previously surfaced the GPT-5.6 name before disappearing [2], and await the official system card, which typically lands simultaneously with the public version bump [2]. A recent Reuters report confirms the delay is government-driven, not technical, suggesting the timeline hinges on policy clearance rather than engineering progress [3].

The funding flows driving book depth on this market are tightly linked to payment friction: deposits via Klarna, SEPA transfers and USDC rails determine how quickly capital enters the book, while withdrawal rails affect retention. When deposit fees rise or SEPA delays occur, liquidity thins, reducing the market’s ability to price in late-breaking news. Conversely, smooth USDC on-ramps correlate with deeper books and sharper odds shifts. This market’s traction is not about AI hype but about the mechanics of capital movement—traders who understand deposit timing and fee structures will spot liquidity gaps before the crowd reacts.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares GPT-5.6 released on 2026? with a focus on payment rails and deposit friction. Polymarket accepts USDC on Polygon only; Kalshi only ACH/Plaid (US only); Betfair card/SEPA in EU/UK; Manifold no deposit. Polymarket Klarna UK additionally offers Klarna and SOFORT as fiat on-ramps to USDC. Live odds reflect the Polymarket order book.

Resolution & payout

Settlement path determines payout latency. Polymarket settles on-chain (USDC, minutes). Broker frontends like Polymarket Klarna UK add Klarna/SOFORT as fiat withdrawal options with T+1 processing. Kalshi: USD via ACH (T+1 to T+3). Betfair: local currency via card/SEPA (T+1 to T+5).

FAQ

How does Klarna deposit work on Polymarket Klarna UK?

You enter the deposit amount in EUR/GBP, choose Klarna as the method, run through Klarna's standard authentication (Pay Later or Direct Bank Transfer), and Polymarket Klarna UK converts internally to USDC for the Polymarket order book. Processing: typically under 30 minutes.

What does SOFORT cost as a deposit method?

Polymarket Klarna UK charges no fees for SOFORT. The only cost is the internal FX spread (typically <1%) on EUR→USDC conversion. SOFORT itself has no end-user fees — the platform absorbs acquirer costs.

How fast is SEPA deposit?

SEPA Instant: under 10 seconds. SEPA Standard: 1-2 business days. Both accepted fee-free; the internal USDC conversion runs automatically once EUR lands in the platform account.

Can I deposit with a credit card?

Yes, Visa and Mastercard. Credit card deposits carry a ~2.5% acquirer surcharge (standard for card payments). Apple Pay and Google Pay run on the same card rails — same surcharge.

Are payment details protected?

Yes. Card and bank details are never stored by Polymarket Klarna UK — they pass directly through PCI-DSS compliant payment service providers (Adyen, Stripe). Polymarket Klarna UK retains only transaction IDs and Klarna reference numbers for reconciliation.