Grok 4.4 released by 2026?

Platform comparison

Market context

The real-world event at the heart of this market is whether xAI will make its Grok 4.4 model available to the general public before the settlement deadline of 30 June 2026. A YES share in this context represents a bet that the model, or a recognised direct successor such as Grok 4.5, will be publicly released by that date; a NO share bets it will not. With the current crowd-implied probability at 0% YES, the market is effectively pricing in failure, yet recent developments suggest a more nuanced picture.

Historical release patterns and comparable cases frame how to interpret this near-zero probability. xAI has consistently followed tight, predictable schedules: Grok 4 launched in July 2025 after a two-week signal gap, and Grok 4.3 beta arrived in April 2026. Elon Musk recently announced Grok 4.4 would arrive in roughly two to three weeks at 1 trillion parameters, with Grok 4.5 following at 1.5 trillion in four to five weeks [2]. Crucially, Grok 4.5 was officially released on 8 July 2026 for coding and agentic work, available via the xAI API and in Cursor across all plans [1][4]. Since the market definition accepts variants recognised as direct successors to Grok 4.3, Grok 4.5’s public launch may already satisfy the YES condition, making the 0% probability appear misaligned with current facts.

Traders should monitor official xAI announcements, API availability logs, and EU rollout timelines, as Grok 4.5 is not yet accessible in the EU but is targeted for mid-July 2026 [1][8]. The key catalyst is whether xAI explicitly confirms Grok 4.4’s public release or whether Grok 4.5’s launch is formally recognised as the qualifying successor. Recent coverage from Mind Studio details Musk’s specific roadmap, confirming Grok 4.4’s imminent arrival and Grok 4.5’s confirmed public status [2]. With the settlement window ending in 2026, the market’s 0% YES rating may reflect a lag in updating for Grok 4.5’s July 2026 release rather than a genuine absence of qualifying models.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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'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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Market UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.