SpaceX Starship Flight Test 12

Platform comparison

Active sub-markets

Market context

SpaceX’s twelfth Starship flight test is the next major launch attempt for the vehicle, with the company having set a 90-minute window from Starbase and signalled a late-May target after earlier scrubs. A 0% YES price is only sensible if the market has already closed or is mis-specified, because public launch tracking and SpaceX’s own schedule pages show the mission as active rather than abandoned. On Polymarket, that kind of binary contract is priced as an implied probability; on Kalshi, it is quoted in cents, so a 25-cent bid is the same 25% view before fees. Betfair and Smarkets tend to show more of the raw market, but the effective price can differ once commission is added, and KYC access is broader on those regulated books than on Polymarket.

The best comparables are earlier Starship flight-test markets, where the contract often moved sharply on pad status, FAA wording, and weather rather than on the long-run odds of SpaceX eventually launching. Flight 11-style outcomes matter here: a vehicle can be fully stacked and still fail to lift off on the first announced window, while a “launch occurs” market can settle yes even if the mission ends early. The current setup is more about timing than technical readiness, because flight 12 is described as the first Block 3 Starship and the first launch from Pad 2, both of which add operational uncertainty.

Traders should watch for launch authority notices, SpaceX’s webcast page, and pad countdown updates, because those are the triggers that usually move short-dated launch markets. Reuters-style reporting on SpaceX schedule changes has tended to focus on FAA approvals, weather, and pad anomalies; Space.com and SpaceX’s own site have already pointed to a May 22 window. If the launch slips again, books with different settlement wording may diverge: one venue may resolve on any liftoff before the deadline, while another may require a specific flight designation or a launch before a precise cut-off.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares SpaceX Starship Flight Test 12 specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to PolyGram, 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

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.

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.