OpenAI’s GPT-6 Astra launch on September 3 secured the top Code Arena WebDev spot at 1,797 points, positioning Anthropic’s Claude Fable 5.1 Max 35 points behind in second on the crowdsourced Elo leaderboard driven by over 650,000 votes for iterative frontend and agentic workflows. This gap, combined with Anthropic’s strong multi-step reasoning track record and limited major releases from rivals in the final weeks of September, underpins the 78.8% market-implied odds for Anthropic as the second-best lab. Chinese models from Alibaba and Moonshot have narrowed Pareto-frontier gaps through cost-efficient updates but trail the top two, while Meta’s recent Muse Spark 1.3 Max improved efficiency without overtaking the leaders.
Riepilogo sperimentale generato dall'AI con riferimento ai dati di Polymarket. Questo non è un consiglio di trading e non ha alcun ruolo nella risoluzione di questo mercato. · AggiornatoSecondo miglior Code Arena WebDev AI Lab a fine settembre?
Anthropic 78.8%
OpenAI 17.6%
Alibaba 2.7%
Moonshot 2.6%
$67,772 Vol.
$67,772 Vol.

Anthropic
79%

OpenAI
18%

Alibaba
3%

Moonshot
3%

SpaceXAI
1%

Tencent
1%

Z.ai
<1%

Meta
<1%

<1%

ByteDance
<1%

MiniMax
<1%

Xiaomi
<1%

DeepSeek
<1%

Thinky
<1%

Poolside
<1%

Mistral
<1%
Anthropic 78.8%
OpenAI 17.6%
Alibaba 2.7%
Moonshot 2.6%
$67,772 Vol.
$67,772 Vol.

Anthropic
79%

OpenAI
18%

Alibaba
3%

Moonshot
3%

SpaceXAI
1%

Tencent
1%

Z.ai
<1%

Meta
<1%

<1%

ByteDance
<1%

MiniMax
<1%

Xiaomi
<1%

DeepSeek
<1%

Thinky
<1%

Poolside
<1%

Mistral
<1%
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".
Mercato aperto: Jul 24, 2026, 7:45 PM ET
Fonte di risoluzione
https://arena.ai/leaderboard/code/webdev?rankBy=labsRisolutore
0x69c47De9D...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".
Fonte di risoluzione
https://arena.ai/leaderboard/code/webdev?rankBy=labsRisolutore
0x69c47De9D...OpenAI’s GPT-6 Astra launch on September 3 secured the top Code Arena WebDev spot at 1,797 points, positioning Anthropic’s Claude Fable 5.1 Max 35 points behind in second on the crowdsourced Elo leaderboard driven by over 650,000 votes for iterative frontend and agentic workflows. This gap, combined with Anthropic’s strong multi-step reasoning track record and limited major releases from rivals in the final weeks of September, underpins the 78.8% market-implied odds for Anthropic as the second-best lab. Chinese models from Alibaba and Moonshot have narrowed Pareto-frontier gaps through cost-efficient updates but trail the top two, while Meta’s recent Muse Spark 1.3 Max improved efficiency without overtaking the leaders.
Riepilogo sperimentale generato dall'AI con riferimento ai dati di Polymarket. Questo non è un consiglio di trading e non ha alcun ruolo nella risoluzione di questo mercato. · Aggiornato

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