Anthropic leads the Code Arena WebDev market at 73.5% implied probability due to consistent top rankings on the live arena.ai leaderboard, where its latest Claude Opus 5 and related models hold the #1 position with strong Elo-style scores from crowdsourced head-to-head evaluations on front-end web development and agentic coding tasks. Recent model releases emphasizing tool use, long-context reasoning, and multi-step workflows have reinforced this edge over competitors. Other listed companies sit near even odds or lower because their current offerings trail on the same benchmark metrics. Traders appear to weigh Anthropic's demonstrated capabilities in real-time coding arenas against the risk of rapid shifts from upcoming releases or benchmark updates before the October resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedAnthropic 74%
Thinky 9.4%
Moonshot 5.5%
SpaceXAI 4.0%
$28,102 Vol.
$28,102 Vol.
Oct 31, 2026
Anthropic
74%
Thinky
9%
Moonshot
5%
SpaceXAI
4%
Alibaba
3%
9%
DeepSeek
1%
Tencent
1%
ByteDance
1%
Mistral
1%
Xiaomi
1%
OpenAI
1%
Meta
1%
Poolside
1%
Z.ai
7%
MiniMax
<1%
Anthropic 74%
Thinky 9.4%
Moonshot 5.5%
SpaceXAI 4.0%
$28,102 Vol.
$28,102 Vol.
Oct 31, 2026
Anthropic
$23,556 Vol.
74%
Thinky
$429 Vol.
9%
Moonshot
$222 Vol.
5%
SpaceXAI
$415 Vol.
4%
Alibaba
$222 Vol.
3%
$347 Vol.
9%
DeepSeek
$242 Vol.
1%
Tencent
$302 Vol.
1%
ByteDance
$296 Vol.
1%
Mistral
$322 Vol.
1%
Xiaomi
$289 Vol.
1%
OpenAI
$326 Vol.
1%
Meta
$405 Vol.
1%
Poolside
$332 Vol.
1%
Z.ai
$232 Vol.
7%
MiniMax
$166 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 October 31, 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.
Note: Models marked “AutoEval” at the applicable check time will not be considered, regardless of whether they display a rank or score.
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 leads the Code Arena WebDev market at 73.5% implied probability due to consistent top rankings on the live arena.ai leaderboard, where its latest Claude Opus 5 and related models hold the #1 position with strong Elo-style scores from crowdsourced head-to-head evaluations on front-end web development and agentic coding tasks. Recent model releases emphasizing tool use, long-context reasoning, and multi-step workflows have reinforced this edge over competitors. Other listed companies sit near even odds or lower because their current offerings trail on the same benchmark metrics. Traders appear to weigh Anthropic's demonstrated capabilities in real-time coding arenas against the risk of rapid shifts from upcoming releases or benchmark updates before the October 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 October 31, 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.
Note: Models marked “AutoEval” at the applicable check time will not be considered, regardless of whether they display a rank or score.
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.
Note: Models marked “AutoEval” at the applicable check time will not be considered, regardless of whether they display a rank or score.
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: Aug 12, 2026, 7:56 PM ET
Volume
$28,102End Date
Oct 31, 2026Market Opened
Aug 12, 2026, 7:56 PM ETResolver
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 October 31, 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.
Note: Models marked “AutoEval” at the applicable check time will not be considered, regardless of whether they display a rank or score.
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 leads the Code Arena WebDev market at 73.5% implied probability due to consistent top rankings on the live arena.ai leaderboard, where its latest Claude Opus 5 and related models hold the #1 position with strong Elo-style scores from crowdsourced head-to-head evaluations on front-end web development and agentic coding tasks. Recent model releases emphasizing tool use, long-context reasoning, and multi-step workflows have reinforced this edge over competitors. Other listed companies sit near even odds or lower because their current offerings trail on the same benchmark metrics. Traders appear to weigh Anthropic's demonstrated capabilities in real-time coding arenas against the risk of rapid shifts from upcoming releases or benchmark updates before the October 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 October 31, 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.
Note: Models marked “AutoEval” at the applicable check time will not be considered, regardless of whether they display a rank or score.
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.
Note: Models marked “AutoEval” at the applicable check time will not be considered, regardless of whether they display a rank or score.
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
$28,102End Date
Oct 31, 2026Market Opened
Aug 12, 2026, 7:56 PM ETResolver
0x69c47De9D...Anthropic leads the Code Arena WebDev market at 73.5% implied probability due to consistent top rankings on the live arena.ai leaderboard, where its latest Claude Opus 5 and related models hold the #1 position with strong Elo-style scores from crowdsourced head-to-head evaluations on front-end web development and agentic coding tasks. Recent model releases emphasizing tool use, long-context reasoning, and multi-step workflows have reinforced this edge over competitors. Other listed companies sit near even odds or lower because their current offerings trail on the same benchmark metrics. Traders appear to weigh Anthropic's demonstrated capabilities in real-time coding arenas against the risk of rapid shifts from upcoming releases or benchmark updates before the October 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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