Alessandro Costa vs Cody Durden Prediction Market Odds, July 11, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
▶Costa | — | — | 69%68% | 69% Kalshi |
▶Durden | — | — | 33%33% | 33% Kalshi |
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Alessandro Costa is the 68.5c moneyline favorite over Cody Durden in the flyweight bout that opens UFC 329 on July 11, 2026, pricing at 69c on Kalshi and 68c on Polymarket to Durden’s 33c on both books. Costa (16-5, 4-3 UFC) brings a two-fight knockout streak on short notice; Durden (18-10-1) counters with a grappling base and a recent decision win over Jafel Filho. The two exchanges agree within 1c, and the line has held steady since open.
Alessandro Costa is the 68.5c moneyline favorite over Cody Durden in the flyweight bout that opens UFC 329: McGregor vs. Holloway 2 on July 11, 2026, from T-Mobile Arena in Las Vegas. Costa (16-5, 4-3 UFC) prices at 69c on Kalshi and 68c on Polymarket, while Durden (18-10-1, 7-8-1 UFC) sits at 33c on both books. The market has traded roughly $66K across the two platforms, and the line has held steady since it opened.
Alessandro Costa vs Cody Durden Moneyline Read
Costa carries the price on finishing form. He has won his last two fights by early-round knockout and steps in on roughly 10 days' notice, replacing Ode Osbourne, a compressed camp the 68.5c line has not discounted. His 16-5 record includes a 4-3 run inside the UFC since 2022. Durden, at 18-10-1 overall and 7-8-1 in the UFC since 2020, most recently beat Jafel Filho by unanimous decision, though he dropped four of his last five before that result. The market reads the finishing threat and the win streak as worth better than a two-to-one edge.
The two books agree almost exactly. Kalshi has Costa at 69c and Polymarket has him at 68c, a 1c gap that leaves no cross-platform value on either side, and Durden is 33c on both. That tight cross-platform read is the tell that this price is well-formed rather than thin. The exchange number is a touch lighter than the sportsbook line, where Costa opened around -250 (about 71% implied) at BetMGM, so the prediction markets give Durden a marginally better shot than the book does. The moneyline has not moved since open: Costa held 69c on Kalshi across the snapshot window, and Polymarket stayed in the 67c to 68c band.
How the Costa vs Durden Market Resolves
The market resolves to the fighter who wins the bout, by knockout, submission, or judges' decision, when the flyweight fight goes final on July 11, 2026. It is scheduled for three rounds, with no championship rounds. A Costa contract pays $1 per share if Costa wins and $0 if he loses, and the Durden contract is the mirror. A no-contest, draw, or a bout pulled from the card resolves per each platform's void rules. Kalshi and Polymarket settle once the official UFC result is posted.
Key Costa vs Durden Fight Factors
Costa short-notice camp: he took the bout on about 10 days' notice replacing Ode Osbourne, the top risk to his 68.5c price.
Costa finishing rate: two straight early-round knockouts fuel the win streak the market is pricing over Durden.
Durden grappling floor: an 18-10-1 record built on a wrestling base that can steal rounds and flip the 33c underdog line.
Cross-platform read: Kalshi 69c versus Polymarket 68c is a 1c gap, so there is no value split to exploit on the Costa vs Durden line.
Sportsbook gap: the exchanges price Costa at 68.5c, lighter than BetMGM's -250 (about 71% implied), a slight lean toward Durden.
Three-round distance: with 15 minutes and no championship rounds, Durden's decision path is shorter than a five-round build.
Related UFC 329 Markets
Costa vs Durden opens a card headlined by the Conor McGregor vs Max Holloway rematch. The other flyweight action sits higher on the card in Brandon Royval vs Lone'er Kavanagh, and the bantamweight main-card feature is Cory Sandhagen vs Mario Bautista. Track every bout on the card across the sports hub.
Resolution Criteria
Resolves to the fighter who wins the bout, by knockout, submission, or judges’ decision, when the flyweight contest goes final on July 11, 2026 at T-Mobile Arena in Las Vegas. The fight is scheduled for three rounds. A Costa share pays $1 if Costa wins and $0 if he loses, and the Durden share is the mirror. A no-contest, draw, or a bout pulled from the card resolves per each platform’s void rules. Kalshi and Polymarket settle once the official UFC result is posted.
Key Factors
- Costa short-notice camp: took the bout on about 10 days notice replacing Ode Osbourne (top risk to his 68.5c price)
- Costa finishing rate: two straight early-round knockouts fuel the win streak the market is pricing
- Durden grappling floor: 18-10-1 with a wrestling base that can steal rounds and flip the 33c underdog line
- Cross-platform read: Kalshi 69c vs Polymarket 68c is a 1c gap, so there is no value split to exploit
- Sportsbook gap: the exchanges price Costa at 68.5c, lighter than BetMGM -250 (about 71% implied)
- Three-round distance: no championship rounds, so Durden decision path runs through 15 minutes
What are the current Alessandro Costa vs Cody Durden odds?
Alessandro Costa is the 68.5c favorite as of July 11, 2026, priced at 69c on Kalshi and 68c on Polymarket. Cody Durden is the underdog at 33c on both platforms.
Who is favored in Costa vs Durden at UFC 329?
Alessandro Costa is favored at 68.5c, an implied probability near 68.5%. His two-fight knockout streak and 16-5 record drive the price over Durden at 18-10-1.
Where can I trade the Costa vs Durden market?
The fight trades on both Kalshi and Polymarket. Kalshi lists Costa at 69c and Polymarket at 68c, a 1c cross-platform gap, with roughly $66K in combined volume.
When does the Costa vs Durden market resolve?
It resolves on July 11, 2026, once the flyweight bout goes final at T-Mobile Arena in Las Vegas. The winner contract pays $1 per share and the loser settles at $0.
What should I watch before Costa vs Durden resolves?
Watch Costa conditioning after taking the fight on about 10 days notice, and whether Durden wrestling can drag the bout into a decision. Any late move off 68.5c would signal news on Costa short-notice camp.