Anthropic holds a 65.3% implied probability for second place in the Code Arena WebDev leaderboard by end of October, reflecting its consistent strength across agentic coding benchmarks and recent model releases like Claude Opus 5 and Fable 5.1, which dominate SWE-bench Verified and related evaluations. OpenAI’s GPT-6 Astra launch on September 3 shifted the top spot on the community-driven Code Arena WebDev leaderboard with a leading 1,797 score, creating the current hierarchy and leaving other labs such as xAI, Google, and Meta well behind at single-digit odds. Traders appear to view Anthropic’s depth in web development workflows and iterative agent performance as the most reliable path to second, absent major new releases from competitors before the October resolution.
Resumo experimental gerado por IA com dados do Polymarket. Isto não é aconselhamento de trading e não tem qualquer papel na resolução deste mercado. · AtualizadoSegundo melhor Code Arena WebDev AI Lab no final de outubro?
Anthropic 65.3%
OpenAI 21%
SpaceXAI 4.7%
Alibaba 5%
$18,952 Vol.
$18,952 Vol.

Anthropic
65%

OpenAI
21%

SpaceXAI
5%

Alibaba
5%

DeepSeek
3%

Moonshot
2%

2%

Meta
2%

Poolside
1%

Z.ai
1%

ByteDance
1%

Xiaomi
1%

Mistral
<1%

Thinky
<1%

Tencent
<1%

MiniMax
<1%
Anthropic 65.3%
OpenAI 21%
SpaceXAI 4.7%
Alibaba 5%
$18,952 Vol.
$18,952 Vol.

Anthropic
65%

OpenAI
21%

SpaceXAI
5%

Alibaba
5%

DeepSeek
3%

Moonshot
2%

2%

Meta
2%

Poolside
1%

Z.ai
1%

ByteDance
1%

Xiaomi
1%

Mistral
<1%

Thinky
<1%

Tencent
<1%

MiniMax
<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".
Mercado Aberto: Aug 12, 2026, 7:56 PM ET
Resolver
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".
Resolver
0x69c47De9D...Anthropic holds a 65.3% implied probability for second place in the Code Arena WebDev leaderboard by end of October, reflecting its consistent strength across agentic coding benchmarks and recent model releases like Claude Opus 5 and Fable 5.1, which dominate SWE-bench Verified and related evaluations. OpenAI’s GPT-6 Astra launch on September 3 shifted the top spot on the community-driven Code Arena WebDev leaderboard with a leading 1,797 score, creating the current hierarchy and leaving other labs such as xAI, Google, and Meta well behind at single-digit odds. Traders appear to view Anthropic’s depth in web development workflows and iterative agent performance as the most reliable path to second, absent major new releases from competitors before the October resolution.
Resumo experimental gerado por IA com dados do Polymarket. Isto não é aconselhamento de trading e não tem qualquer papel na resolução deste mercado. · Atualizado
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