Grok 4.6 released by 2026?

Platform comparison

Market context

SpaceX's xAI division has not yet released Grok 4.6 to the general public as of early 2025, and Polymarket traders are pricing the conditional token at zero, reflecting near-total scepticism that a public release will occur by mid-August 2026. The market settles on whether a product explicitly branded Grok 4.6—or a direct successor variant such as Grok 4.75—becomes available to ordinary users within the specified window. Task-specialised models or efficiency variants bearing the 4.6 designation would qualify; a jump to Grok 5 would not.

xAI's release cadence offers limited precedent for forecasting. Grok 3 entered limited beta in late 2024 before broader rollout; Grok 4 followed in early 2025 with staged access. The company has shown willingness to iterate within major versions—Grok 4.5 arrived months after Grok 4—but the interval between numbered releases remains irregular. No public roadmap commits xAI to a 4.6 release by August 2026, and Elon Musk's statements on xAI development priorities have emphasised reasoning capabilities and real-time information access rather than incremental versioning.

Traders monitoring this contract should track xAI's official announcements and Musk's public remarks on model development timelines. The company's historical pattern of surprise releases complicates prediction, though any public statement of a 4.6 launch date would immediately shift market pricing. Broader AI competition from OpenAI, Anthropic and Google may influence xAI's release strategy, though no external dependency directly governs whether a 4.6 variant reaches public availability within the settlement window.

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Scam?. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.