Next Claude Sonnet released by 2026?

Platform comparison

Market context

Anthropic will make its next Claude Sonnet model available to the general public before the settlement deadline of 31 July 2026, a real-world event that currently carries a 91% implied probability of success on Polymarket. Traders viewing this contract today see the market pricing in near-certainty, with USDC deposits on the Polygon network backing conditional tokens that resolve to either full payout or total loss based on the launch date.

Historical release patterns frame this high confidence: the Sonnet line has consistently advanced every four to six months, with Claude Sonnet 4.6 launching in February 2026 and Claude Sonnet 4.5 in September 2025, suggesting a 5.0 variant is due by mid-2026. The deprecation of the original Sonnet 4 on 15 June 2026 further pressures Anthropic to replace it with a new public model, as seen in prior cycles where retired models were swiftly superseded by updated versions available on the API and cloud platforms [4][1].

Key catalysts for traders include Anthropic’s upcoming transparency announcements and the scheduled release of Claude Opus 4.8 in May 2026, which often precedes a Sonnet update within two months. Watch for official blog posts or API documentation updates mentioning a Sonnet 5.0 knowledge cutoff or release window, as these have historically confirmed launches weeks before public access [3][7]. The market’s current pricing assumes no major delays, but any shift in Anthropic’s development timeline or cloud integration schedule could alter the outcome.

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

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.

FAQ

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

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