Next Claude Opus released by 2026?

Platform comparison

Market context

Anthropic’s next Claude Opus model must be publicly accessible by the end of 2026 for the market to resolve to “Yes,” with the crowd currently pricing a 95% chance of success. The last confirmed Opus release was Claude Opus 4.8 on 28 May 2026, available immediately via API and all Claude products [1][2]. Prior to that, Opus 4.7 launched across Amazon Bedrock, Google Vertex AI, and Microsoft Foundry, establishing a pattern of rapid, multi-platform deployment for each Opus iteration [4].

Historically, Anthropic has released new Opus variants roughly every two to three months, with no confirmed gaps exceeding six months since Opus 4.0. The suspension of Mythos-class models Fable 5 and Mythos 5 in June 2026 due to US export controls introduces a potential dependency: restoration of those models may precede a safeguarded Opus refresh, though no specific next Opus name is confirmed as of 23 June 2026 [3]. Traders should monitor Anthropic’s official announcements for any mention of an Opus 4.9 or Opus 5.0, as only explicitly named Opus variants qualify.

On Polymarket, this event trades at 0.95 decimal odds with a 2.5% fee and no KYC, while Kalshi would express the same as 95% implied probability with a 1% fee and strict US KYC. Betfair and Smarkets typically list similar events as 19/1 odds (decimal 20.00) with lower fees but require identity verification for non-EU users. The divergence in odds formatting and fee structures means the 95% implied probability on Polymarket may not align directly with equivalent bets elsewhere, affecting arbitrage potential.

Sources: 1 · 2 · 3 · 4

Methodology

This page compares Next Claude Opus released by 2026? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Kalshi Alternative UK offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.