Anthropic's Claude Opus 5 models, including the top-ranked claude-opus-5-max variant, lead the Code Arena WebDev leaderboard with scores above 1,690 as of late August 2026, driving the 78.5% market-implied probability. The July 2026 release delivered frontier agentic coding performance on tasks like image-to-web generation, multi-step reasoning, and full-stack workflows, outpacing competitors in human-preference evaluations. Rivals such as Moonshot's Kimi K3, Alibaba's Qwen3.8, and OpenAI's GPT-5.6 variants trail by meaningful margins, with several open-weight models reshaping cost-performance frontiers but not overall rankings. Traders appear to view Anthropic's consistent top placements and specialized coding optimizations as durable advantages through September resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedAnthropic 79%
Moonshot 6.7%
Alibaba 4.7%
Meta 3.6%
$52,843 Vol.
$52,843 Vol.
Sep 30, 2026
Anthropic
79%
Moonshot
7%
Alibaba
5%
Meta
4%
Z.ai
3%
2%
OpenAI
7%
DeepSeek
1%
SpaceXAI
1%
ByteDance
<1%
MiniMax
<1%
Xiaomi
<1%
Thinky
<1%
Tencent
<1%
Poolside
<1%
Mistral
<1%
Anthropic 79%
Moonshot 6.7%
Alibaba 4.7%
Meta 3.6%
$52,843 Vol.
$52,843 Vol.
Sep 30, 2026
Anthropic
$25,523 Vol.
79%
Moonshot
$12,539 Vol.
7%
Alibaba
$1,197 Vol.
5%
Meta
$1,109 Vol.
4%
Z.ai
$1,378 Vol.
3%
$1,385 Vol.
2%
OpenAI
$3,547 Vol.
7%
DeepSeek
$962 Vol.
1%
SpaceXAI
$959 Vol.
1%
ByteDance
$468 Vol.
<1%
MiniMax
$559 Vol.
<1%
Xiaomi
$657 Vol.
<1%
Thinky
$560 Vol.
<1%
Tencent
$571 Vol.
<1%
Poolside
$641 Vol.
<1%
Mistral
$789 Vol.
<1%
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".Anthropic's Claude Opus 5 models, including the top-ranked claude-opus-5-max variant, lead the Code Arena WebDev leaderboard with scores above 1,690 as of late August 2026, driving the 78.5% market-implied probability. The July 2026 release delivered frontier agentic coding performance on tasks like image-to-web generation, multi-step reasoning, and full-stack workflows, outpacing competitors in human-preference evaluations. Rivals such as Moonshot's Kimi K3, Alibaba's Qwen3.8, and OpenAI's GPT-5.6 variants trail by meaningful margins, with several open-weight models reshaping cost-performance frontiers but not overall rankings. Traders appear to view Anthropic's consistent top placements and specialized coding optimizations as durable advantages through September resolution.
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".
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".
Market Opened: Jul 20, 2026, 7:23 PM ET
Volume
$52,843End Date
Oct 1, 2026Market Opened
Jul 20, 2026, 7:23 PM ETResolution Source
https://arena.ai/leaderboard/code/webdevResolver
0x69c47De9D...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".Anthropic's Claude Opus 5 models, including the top-ranked claude-opus-5-max variant, lead the Code Arena WebDev leaderboard with scores above 1,690 as of late August 2026, driving the 78.5% market-implied probability. The July 2026 release delivered frontier agentic coding performance on tasks like image-to-web generation, multi-step reasoning, and full-stack workflows, outpacing competitors in human-preference evaluations. Rivals such as Moonshot's Kimi K3, Alibaba's Qwen3.8, and OpenAI's GPT-5.6 variants trail by meaningful margins, with several open-weight models reshaping cost-performance frontiers but not overall rankings. Traders appear to view Anthropic's consistent top placements and specialized coding optimizations as durable advantages through September resolution.
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".
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".
Volume
$52,843End Date
Oct 1, 2026Market Opened
Jul 20, 2026, 7:23 PM ETResolution Source
https://arena.ai/leaderboard/code/webdevResolver
0x69c47De9D...Anthropic's Claude Opus 5 models, including the top-ranked claude-opus-5-max variant, lead the Code Arena WebDev leaderboard with scores above 1,690 as of late August 2026, driving the 78.5% market-implied probability. The July 2026 release delivered frontier agentic coding performance on tasks like image-to-web generation, multi-step reasoning, and full-stack workflows, outpacing competitors in human-preference evaluations. Rivals such as Moonshot's Kimi K3, Alibaba's Qwen3.8, and OpenAI's GPT-5.6 variants trail by meaningful margins, with several open-weight models reshaping cost-performance frontiers but not overall rankings. Traders appear to view Anthropic's consistent top placements and specialized coding optimizations as durable advantages through September resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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