Dota 2: OG vs GamerLegion (BO3) - The International Group Stage

Platform comparison

Market context

OG and GamerLegion are scheduled to meet in Round 5 of The International Group Stage on 15 August 2026 at 05:30 ET in a best-of-three series. The match determines seeding progression within the group phase of Valve's flagship annual Dota 2 championship. OG, a two-time International champion with consistent top-tier roster construction, enters as the established favourite despite the 0% crowd-implied probability across prediction markets. GamerLegion, a European organisation with variable competitive performance across recent seasons, represents the underdog positioning.

The 0% implied probability reflects either extreme confidence in OG's superiority or minimal trading volume on this specific contract. Comparable International group-stage matchups between established champions and mid-tier European squads historically settle in the 70–85% range for the favourites, suggesting the current market price diverges sharply from historical precedent. Cross-platform sportsbook lines, where available, typically price OG between −250 and −300 in moneyline format, implying roughly 71–75% win probability. This gap between prediction-market pricing and conventional betting odds warrants scrutiny before settlement.

Traders should monitor roster confirmations and scrim results released in the week preceding 15 August, as last-minute substitutions or injury announcements occasionally shift group-stage dynamics. The International's official schedule and any format changes affecting group advancement will be published by Valve in early August. The settlement window closes at 15:35 ET on match day; postponement provisions extend to 29 August 2026 at 23:59 ET, providing a two-week buffer for rescheduling should technical or logistical issues arise.

Methodology

We track Dota 2: OG vs GamerLegion (BO3) - The International Group Stage across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 Best Prediction Markets. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.

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.