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“Will Anthropic be the second-best Code Arena | WebDev AI lab at the end of September 2026?” is a tech prediction market on Polymarket with two tradeable outcomes, Yes and No. It belongs to the event “Second-best Code Arena WebDev AI Lab end of September?”. The Yes price is the market's implied probability that the question resolves Yes. Quotes can change as orders are updated or filled; a quoted price does not guarantee an available fill at that price.
Trading is open until Sep 30, 2026 UTC. As of Sep 25, 11:08 AM UTC, Yes trades at 4.8¢, a 4.8% implied chance, $116.86 traded in the last 24 hours, $1.33K resting in the order book, a 5.1% bid-ask spread.
Vultax observes this market from Polymarket's public order book and data API and keeps its own record: 62 daily price points from Jul 26, 2026 UTC to Sep 25, 2026 UTC (Yes between 4.3% and 86.7%); 100 loaded holder wallets, the largest ten holding 80.5% of the loaded shares; 500 recent public fills from 163 wallets. Each figure carries its observation time; nothing here is a return forecast.
Public Polymarket market/event context is available; Vultax source-pack coverage is tracked separately.
Current public quote is shown when Vultax depth snapshots are unavailable.
Nine stops, one per figure on this page. Each stop says what the number is, why it matters, and what it reads right now for this market.
Each outcome trades as a share that pays $1 if it wins and nothing if it loses. Prices are quoted in cents, and Yes plus No add up to about one dollar.
Daily closes of the Yes price, Polymarket CLOB · 62 points · 26 Jul 2026 – 25 Sep 2026
| Observed | Yes price |
|---|---|
| 26 Jul 2026 | 40.5% |
| 25 Sep 2026 | 4.7% |
| Trader | Outcome | Shares |
|---|---|---|
| Indigo Signal 2966 | No | 3.71K |
| 8dcc906a9b | Yes | 1.59K |
| qianyi2026 | Yes |
This market will resolve according to the second-highest ranked Company based on the arena.ai Code Arena | WebDev Leaderboard when the table under "Code Arena | WebDev" filtered for "Labs" is checked on September 30, 2026, 12:00 PM ET. Results from the "Lab Rank" column under the "Code Arena | WebDev" Leaderboard tab at https://arena.ai/leaderboard/code/webdev?rankBy=labs (Overall) filtered for "Labs" will be used to resolve this market. AI companies will be ordered primarily by their Lab Rank at the market’s check time. If the results based on the lab ranking are ambiguous or unavailable, the relevant AI companies will be ordered according to their highest-ranking AI model in the leaderboard’s “Models” view. 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 AI lab/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 second 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".
Official listing: polymarket.com/event/second-best-code-arena-webdev-ai-lab-end-of-september-20260722215814727
The Yes price read as a chance. A share at 21.5¢ implies 21.5%, but fees, available depth and who participates can affect that price. A market price is not a calibrated forecast or a verdict.
Dollar value of shares that changed hands in the last 24 hours. High volume means the price is being tested by real money; low volume means a few trades can move it.
Reported dollars resting in the order book. The available size on your side, at the prices you would accept, determines what can fill. A large total alone does not guarantee an execution near the quoted price.
The gap between the best bid and the best ask. A tight spread makes entry and exit cheap; a wide spread is a cost paid on every round trip.
The wallets holding the most shares on each side, and how much of the loaded sample the largest ten control. Concentration shows whether a market is a crowd or a handful of large positions.
The public fills, newest first: which wallet bought or sold which outcome, at what price, and when. It is the market's own diary, and every wallet on it links to a trader profile.
Observed closes of the Yes price over the market's life. The range shows how sure or split the crowd has been; the move shows which way it has been changing its mind.
Trading stops at the close time. The outcome is then settled by the resolution source named in the rules. A closed market is not resolved until the venue reports it, so the two states are shown separately.
| 1.49K |
| caspar1248 | No | 1.25K |
| Liechti0 | Yes | 751.07 |
| 1in1000 | No | 583.01 |
| libratus1 | Yes | 412.66 |
| chaosj88 | Yes | 276.47 |
| NoTeacher | Yes | 235.82 |
| Mr.Frog🐸 | No | 200 |