Next Claude Sonnet released by 2026?

Platform comparison

Market context

Anthropic is expected to launch its next Claude Sonnet model for general public access before the end of July 2026, a timeline that aligns with the current 93% market probability favouring a "Yes" outcome. This high confidence reflects a consistent pattern in the company’s release history, where Sonnet variants typically follow major Opus updates within six to nine months. For instance, Claude Sonnet 4.6 arrived in February 2026, just seven months after Claude Opus 4.6 in February 2025, and Claude Sonnet 4.5 was released in September 2025, shortly after Opus 4.5 in September 2025[1][3]. The deprecation of the original Sonnet 4 and Opus 4 on 15 June 2026 further signals that a successor is imminent, as Anthropic rarely retires base models without a replacement already in the pipeline[4].

Traders should monitor official announcements from Anthropic, particularly any mentions of a "Sonnet 5" or "Claude Sonnet 5.0" in the coming weeks, as these would act as direct catalysts for the market resolving positively. Recent community speculation on Reddit suggests a Q1 2026 window for Claude 5, but the rapid pace of development could push the Sonnet variant into the second quarter or early third quarter[2]. With the settlement deadline fixed at 31 July 2026, the on-chain mechanics on Polymarket—using USDC on Polygon and conditional tokens—will price the contract based on real-time news flow rather than abstract probability. Any delay in the launch of Claude Fable 5, which became generally available on 9 June 2026, could also impact the timing of the Sonnet release, as Anthropic often staggers major model launches[8]. The market’s current pricing already incorporates these dependencies, leaving little room for surprise unless the launch is postponed beyond the deadline.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.

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

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 Kalshi 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.