Grok 4.4 released by 2026?

Platform comparison

Market context

xAI has confirmed that Grok 4.4 will arrive within two to three weeks, yet the model remains in private beta with no public launch date set, mirroring the recent trajectory of Grok 4.5 which was announced on 28 June but is still restricted to SpaceX and Tesla teams[1][2]. Historical patterns show that xAI typically teases a model roughly two weeks before public release, as seen with Grok 4’s announcement on 27 June 2025 and launch on 9 July 2025[4]. However, the current 0% crowd-implied probability reflects a significant delay; Grok 4.5 was originally targeted for late May 2026 but is now running a month behind schedule, suggesting that internal alignment and deployment hurdles are pushing timelines further than anticipated[1].

Traders must monitor Elon Musk’s next specific announcement regarding the public rollout window, as the current roadmap places Grok 4.4 at 1 trillion parameters with training data through early April, followed by Grok 4.5 at 1.5 trillion parameters in four to five weeks[2]. The critical dependency is the completion of pre-training for Grok 5, which is expected in roughly two months, with post-training alignment and deployment work likely pushing a realistic public release into late 2025 or early 2026[2]. Until xAI publishes a definitive public launch date or broader rollout plan, the market traction remains tethered to funding flows that drive book depth, where Klarna deposits and SEPA withdrawal rails are essential for sustaining liquidity in this volatile sector[1]. The absence of public benchmarks and the reliance on private beta testing further underscore the uncertainty surrounding the specified settlement window ending 2026-06-30[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Grok 4.4 released by 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

Which payment methods are supported?

Klarna (Pay Now / Pay Later), SOFORT, SEPA bank transfer, credit card (Visa/Mastercard), Apple Pay, Google Pay, and direct USDC deposit on Polygon. Availability depends on your jurisdiction.

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.

What's the minimum deposit?

10 EUR / 10 USD equivalent. No upper limit, but deposits over $1,500 lifetime volume trigger a quick KYC flow (typically 5-10 minutes).

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.