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Will OpenAI have the best Code Arena | WebDev AI at the end of September 2026?

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Polymarket Closes Sep 30, 2026
LIVE PRICES — YES
PolymarketTrade ↗
55¢ last
BidAsk
YES56¢60¢
NO40¢44¢
$46,258 volume
Listed on Polymarket only. Kalshi does not carry a market that settles on this exact question, so there is no cross-venue price to compare here.
30-DAY PRICE HISTORY
HOW THIS RESOLVES

Polymarket — resolution criteria

This market will resolve according to the company that owns the model that has the highest rank based on the arena.ai Code Arena | WebDev Leaderboard when the table under "Code Arena | WebDev" filtered for "Models" is checked on September 30, 2026, 12:00 PM ET. Results from the "Rank" column under the "Code Arena | WebDev" Leaderboard tab at https://arena.ai/leaderboard/code/webdev (Overall) filtered for "Models" will be used to resolve this market. Models will be ordered primarily by their leaderboard rank at the market’s check time. If two or more models are tied on rank, they will be ordered by which model is listed higher on the leaderboard. If a tie still remains, alphabetical order of company names as listed in this market group will be used as a final tiebreaker (e.g., “Google” would be ranked ahead of “SpaceXAI”). This market will resolve based on the company that occupies first place under this ranking. The resolution source for this market is the arena.ai Code Arena | WebDev Leaderboard. If this resolution source is unavailable at check time, this market will remain open until the leaderboard comes back online and will resolve based on the first check after it becomes available. If it becomes permanently unavailable, this market will resolve to "Other".

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STATS
Cross-venue spread
Kalshi last
Polymarket last55¢
Venues2
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