The closely matched market-implied odds around 50% reflect the fluid early results on the newly launched Code Arena WebDev leaderboard, where frontier labs compete on agentic, multi-file web development tasks such as building React apps and handling real tool-use workflows. Anthropic edges ahead on trader sentiment due to Claude Opus 4.8 and related models posting leading scores on related agent benchmarks like Online-Mind2Web and strong SWE-bench Verified performance, highlighting reliability in complex frontend-backend integration. OpenAI’s GPT-5.5 and GPT-5.6 variants remain direct contenders through superior planning capabilities and ecosystem integration, while cost-effective challengers like DeepSeek V4-Pro and various Qwen/Alibaba releases add uncertainty. With the arena still accumulating votes and labs iterating rapidly ahead of the August resolution, small shifts in human preference data or new releases could quickly reorder the field.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedMoonshot 43%
SpaceXAI 42%
Meta 42%
Anthropic 42%

Moonshot
43%

SpaceXAI
42%

Meta
42%

Anthropic
42%

OpenAI
42%

Z.ai
42%

ByteDance
42%

Mistral
41%

39%

Thinky
39%

Poolside
39%

Alibaba
39%

MiniMax
39%

Xiaomi
39%

DeepSeek
39%

Tencent
38%
Moonshot 43%
SpaceXAI 42%
Meta 42%
Anthropic 42%

Moonshot
43%

SpaceXAI
42%

Meta
42%

Anthropic
42%

OpenAI
42%

Z.ai
42%

ByteDance
42%

Mistral
41%

39%

Thinky
39%

Poolside
39%

Alibaba
39%

MiniMax
39%

Xiaomi
39%

DeepSeek
39%

Tencent
38%
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".
Market Opened: Jul 20, 2026, 8:25 PM ET
Resolution Source
https://arena.ai/leaderboard/code/webdev?rankBy=labsResolver
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".
Resolution Source
https://arena.ai/leaderboard/code/webdev?rankBy=labsResolver
0x69c47De9D...The closely matched market-implied odds around 50% reflect the fluid early results on the newly launched Code Arena WebDev leaderboard, where frontier labs compete on agentic, multi-file web development tasks such as building React apps and handling real tool-use workflows. Anthropic edges ahead on trader sentiment due to Claude Opus 4.8 and related models posting leading scores on related agent benchmarks like Online-Mind2Web and strong SWE-bench Verified performance, highlighting reliability in complex frontend-backend integration. OpenAI’s GPT-5.5 and GPT-5.6 variants remain direct contenders through superior planning capabilities and ecosystem integration, while cost-effective challengers like DeepSeek V4-Pro and various Qwen/Alibaba releases add uncertainty. With the arena still accumulating votes and labs iterating rapidly ahead of the August resolution, small shifts in human preference data or new releases could quickly reorder the field.
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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