Anthropic holds an implied 78% probability as the second-best lab on Code Arena’s WebDev leaderboard by end-September because its Claude models, including the recently released Fable 5.1, have maintained strong community-voted Elo ratings and dominate independent coding benchmarks such as SWE-bench Verified (96% for Opus 5) and related agentic evaluations. OpenAI’s GPT-6 Astra overtook the top spot on September 5 with 1,797 points, 35 ahead of Claude Fable 5.1, shifting the contest to a clear first-versus-second dynamic while other labs remain far behind on the crowdsourced platform. Traders appear to view Anthropic’s model family depth, consistent performance across frontend-backend tasks, and rapid iteration cadence as sufficient to hold second place through the final weeks of voting, despite the possibility of further OpenAI updates or surges from Chinese labs narrowing the gap.
Résumé expérimental généré par IA à partir des données Polymarket. Ceci n'est pas un conseil de trading et ne joue aucun rôle dans la résolution de ce marché. · Mis à jourAnthropic 77.8%
OpenAI 18.2%
Alibaba 2.7%
Moonshot 2.4%
$68,573 Vol.
$68,573 Vol.
30 sept. 2026
Anthropic
78%
OpenAI
18%
Alibaba
3%
Moonshot
2%
SpaceXAI
1%
Tencent
<1%
Z.ai
<1%
Meta
<1%
<1%
ByteDance
<1%
MiniMax
<1%
Xiaomi
<1%
DeepSeek
<1%
Thinky
<1%
Poolside
<1%
Mistral
<1%
Anthropic 77.8%
OpenAI 18.2%
Alibaba 2.7%
Moonshot 2.4%
$68,573 Vol.
$68,573 Vol.
30 sept. 2026
Anthropic
$13,590 Vol.
78%
OpenAI
$7,962 Vol.
18%
Alibaba
$16,923 Vol.
3%
Moonshot
$12,098 Vol.
2%
SpaceXAI
$2,291 Vol.
1%
Tencent
$1,731 Vol.
<1%
Z.ai
$1,850 Vol.
<1%
Meta
$1,562 Vol.
<1%
$1,641 Vol.
<1%
ByteDance
$3,054 Vol.
<1%
MiniMax
$598 Vol.
<1%
Xiaomi
$1,468 Vol.
<1%
DeepSeek
$1,022 Vol.
<1%
Thinky
$617 Vol.
<1%
Poolside
$1,035 Vol.
<1%
Mistral
$1,130 Vol.
<1%
This market will resolve according to the second-highest ranked Company based on the arena.ai Code Arena | WebDev Leaderboard when the table under "Code Arena | WebDev" filtered for "Labs" is checked on September 30, 2026, 12:00 PM ET.
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".Anthropic holds an implied 78% probability as the second-best lab on Code Arena’s WebDev leaderboard by end-September because its Claude models, including the recently released Fable 5.1, have maintained strong community-voted Elo ratings and dominate independent coding benchmarks such as SWE-bench Verified (96% for Opus 5) and related agentic evaluations. OpenAI’s GPT-6 Astra overtook the top spot on September 5 with 1,797 points, 35 ahead of Claude Fable 5.1, shifting the contest to a clear first-versus-second dynamic while other labs remain far behind on the crowdsourced platform. Traders appear to view Anthropic’s model family depth, consistent performance across frontend-backend tasks, and rapid iteration cadence as sufficient to hold second place through the final weeks of voting, despite the possibility of further OpenAI updates or surges from Chinese labs narrowing the gap.
This market will resolve according to the second-highest ranked Company based on the arena.ai Code Arena | WebDev Leaderboard when the table under "Code Arena | WebDev" filtered for "Labs" is checked on September 30, 2026, 12:00 PM ET.
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".
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".
Marché ouvert : Jul 24, 2026, 7:45 PM ET
Volume
$68,573Date de fin
1 oct. 2026Marché ouvert
Jul 24, 2026, 7:45 PM ETSource de résolution
https://arena.ai/leaderboard/code/webdev?rankBy=labsRésolveur
0x69c47De9D...This market will resolve according to the second-highest ranked Company based on the arena.ai Code Arena | WebDev Leaderboard when the table under "Code Arena | WebDev" filtered for "Labs" is checked on September 30, 2026, 12:00 PM ET.
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".Anthropic holds an implied 78% probability as the second-best lab on Code Arena’s WebDev leaderboard by end-September because its Claude models, including the recently released Fable 5.1, have maintained strong community-voted Elo ratings and dominate independent coding benchmarks such as SWE-bench Verified (96% for Opus 5) and related agentic evaluations. OpenAI’s GPT-6 Astra overtook the top spot on September 5 with 1,797 points, 35 ahead of Claude Fable 5.1, shifting the contest to a clear first-versus-second dynamic while other labs remain far behind on the crowdsourced platform. Traders appear to view Anthropic’s model family depth, consistent performance across frontend-backend tasks, and rapid iteration cadence as sufficient to hold second place through the final weeks of voting, despite the possibility of further OpenAI updates or surges from Chinese labs narrowing the gap.
This market will resolve according to the second-highest ranked Company based on the arena.ai Code Arena | WebDev Leaderboard when the table under "Code Arena | WebDev" filtered for "Labs" is checked on September 30, 2026, 12:00 PM ET.
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".
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".
Volume
$68,573Date de fin
1 oct. 2026Marché ouvert
Jul 24, 2026, 7:45 PM ETSource de résolution
https://arena.ai/leaderboard/code/webdev?rankBy=labsRésolveur
0x69c47De9D...Anthropic holds an implied 78% probability as the second-best lab on Code Arena’s WebDev leaderboard by end-September because its Claude models, including the recently released Fable 5.1, have maintained strong community-voted Elo ratings and dominate independent coding benchmarks such as SWE-bench Verified (96% for Opus 5) and related agentic evaluations. OpenAI’s GPT-6 Astra overtook the top spot on September 5 with 1,797 points, 35 ahead of Claude Fable 5.1, shifting the contest to a clear first-versus-second dynamic while other labs remain far behind on the crowdsourced platform. Traders appear to view Anthropic’s model family depth, consistent performance across frontend-backend tasks, and rapid iteration cadence as sufficient to hold second place through the final weeks of voting, despite the possibility of further OpenAI updates or surges from Chinese labs narrowing the gap.
Résumé expérimental généré par IA à partir des données Polymarket. Ceci n'est pas un conseil de trading et ne joue aucun rôle dans la résolution de ce marché. · Mis à jourConnexes
SpaceXAI sera-t-il le troisième meilleur Code Arena | laboratoire d’IA WebDev à la fin septembre 2026 ?
42%
Oui
Anthropic sera-t-il le deuxième meilleur laboratoire Code Arena | WebDev IA à la fin octobre 2026 ?
66%
Oui
OpenAI aura-t-il la meilleure Code Arena | WebDev IA à la fin de septembre 2026 ?
83%
Oui
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