Will Anthropic’s valuation hit … by December 31?

Platform comparison

Market context

Anthropic’s private market valuation must reach the listed threshold by 31 December 2026, as measured by Nasdaq Private Market’s NPM Price, to resolve this prediction market as “Yes”. Current NPM data shows the company valued at $1.14 trillion in July 2026, 18% above its Series H-1 round of $965 billion [1][2]. Historical precedent from similar private-company valuation markets on Polymarket suggests even-odds bets often cluster 60–70% above current NPM levels; for instance, Polymarket priced a $1.9 trillion even-odds outcome at 50%, implying a 65% premium over today’s $1.14T [2]. The current 12% crowd-implied probability for this specific threshold suggests the market views the target as significantly above the $1.9T even-odds benchmark, aligning with a steep upward trajectory requirement.

Traders should monitor Anthropic’s S-1 filing progress and any secondary-market trading activity, as the company confidentially filed its S-1 on 1 June 2026 targeting a $965 billion valuation, with potential for re-pricing ahead of IPO [10]. Recent Polymarket contracts show 99% implied probability for Anthropic joining the trillion-dollar club by 2026, and 78% for exceeding $1.5 trillion, indicating strong momentum toward higher valuations [3]. Platform divergence is stark: Polymarket (and its mirror Robinhood Prediction Markets) offers 0% fees with no KYC up to $1,500, while Kalshi charges up to 7% per trade and requires US-only KYC, and Betfair takes 2–5% commission with full KYC from the first trade [5]. Settlement also differs—Polymarket uses USDC via UMA oracle, Kalshi clears in USD through its in-house engine, and Betfair settles in local currency post-match [5].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Will Anthropic’s valuation hit … by December 31? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

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

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

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.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.