Anthropic holds the leading 59% market-implied odds for second place on Code Arena’s WebDev leaderboard by end of October, reflecting its Claude 5 family’s sustained dominance across SWE-bench Verified (96% for Opus 5) and agentic coding tasks. OpenAI’s recent GPT-6 Astra launch on September 3 captured the top WebDev spot with a 1,797 Elo score, 35 points ahead of Claude Fable 5.1, highlighting gains in frontend iteration and community voting. Key differentiators include Anthropic’s edge in multi-step reasoning and tool use versus OpenAI’s cost-efficient agent performance and fresh momentum. Moonshot’s Kimi K3 and Google’s Gemini variants trail but show competitive WebDev and LiveCodeBench results. Further releases or benchmark updates before October 31 could shift crowd-sourced Elo rankings.
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 ottobre?
Anthropic 58.9%
OpenAI 26%
Alibaba 7%
SpaceXAI 3.9%
$17,598 Vol.
$17,598 Vol.

Anthropic
59%

OpenAI
26%

Alibaba
7%

SpaceXAI
4%

2%

DeepSeek
2%

Moonshot
2%

Meta
2%

Z.ai
1%

Poolside
1%

Tencent
1%

Xiaomi
1%

Thinky
<1%

ByteDance
<1%

MiniMax
<1%

Mistral
<1%
Anthropic 58.9%
OpenAI 26%
Alibaba 7%
SpaceXAI 3.9%
$17,598 Vol.
$17,598 Vol.

Anthropic
59%

OpenAI
26%

Alibaba
7%

SpaceXAI
4%

2%

DeepSeek
2%

Moonshot
2%

Meta
2%

Z.ai
1%

Poolside
1%

Tencent
1%

Xiaomi
1%

Thinky
<1%

ByteDance
<1%

MiniMax
<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.
Note: Models marked “AutoEval” at the applicable check time will not be considered, regardless of whether they display a rank or score.
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: Aug 12, 2026, 7:56 PM ET
Risolutore
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.
Note: Models marked “AutoEval” at the applicable check time will not be considered, regardless of whether they display a rank or score.
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".
Risolutore
0x69c47De9D...Anthropic holds the leading 59% market-implied odds for second place on Code Arena’s WebDev leaderboard by end of October, reflecting its Claude 5 family’s sustained dominance across SWE-bench Verified (96% for Opus 5) and agentic coding tasks. OpenAI’s recent GPT-6 Astra launch on September 3 captured the top WebDev spot with a 1,797 Elo score, 35 points ahead of Claude Fable 5.1, highlighting gains in frontend iteration and community voting. Key differentiators include Anthropic’s edge in multi-step reasoning and tool use versus OpenAI’s cost-efficient agent performance and fresh momentum. Moonshot’s Kimi K3 and Google’s Gemini variants trail but show competitive WebDev and LiveCodeBench results. Further releases or benchmark updates before October 31 could shift crowd-sourced Elo rankings.
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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