Recent model releases have tightened the race for second-place AI lab status on arena.ai leaderboards heading into late September 2026. OpenAI’s GPT-6 Astra rollout on September 3 introduced advanced capabilities that reinforced its frontrunner position, while Anthropic’s Claude Fable 5.1 and Mythos 5.1 variants delivered strong Terminal-Bench gains and efficiency improvements. Google’s Gemini 3.7/3.8 Flash updates continue to post competitive benchmark results in scientific reasoning and agent tasks, supporting its market-implied edge. Meta’s open-weight Muse Spark momentum, alongside Chinese labs’ inference-focused releases, creates a fragmented field where small leaderboard shifts from style-control variants or new evaluations could alter rankings. Traders appear to weigh demonstrated performance, ecosystem integration, and release cadence as key swing factors amid ongoing uncertainty.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedMeta 46%
OpenAI 31%
Anthropic 16.5%
Google 8%
$64,689 Vol.
$64,689 Vol.
Sep 30, 2026
Meta
46%
OpenAI
31%
Anthropic
17%
8%
Alibaba
1%
Z.ai
1%
Moonshot
1%
SpaceXAI
<1%
DeepSeek
<1%
Xiaomi
<1%
StepFun
<1%
Baidu
<1%
Meituan
<1%
ByteDance
<1%
MiniMax
<1%
Thinky
<1%
Mistral
<1%
Amazon
<1%
Nvidia
<1%
Tencent
<1%
Microsoft
<1%
Meta 46%
OpenAI 31%
Anthropic 16.5%
Google 8%
$64,689 Vol.
$64,689 Vol.
Sep 30, 2026
Meta
$19,522 Vol.
46%
OpenAI
$12,661 Vol.
31%
Anthropic
$3,186 Vol.
17%
$9,066 Vol.
8%
Alibaba
$4,605 Vol.
1%
Z.ai
$1,180 Vol.
1%
Moonshot
$1,422 Vol.
1%
SpaceXAI
$1,087 Vol.
<1%
DeepSeek
$1,238 Vol.
<1%
Xiaomi
$978 Vol.
<1%
StepFun
$1,027 Vol.
<1%
Baidu
$1,006 Vol.
<1%
Meituan
$1,187 Vol.
<1%
ByteDance
$827 Vol.
<1%
MiniMax
$1,544 Vol.
<1%
Thinky
$645 Vol.
<1%
Mistral
$460 Vol.
<1%
Amazon
$820 Vol.
<1%
Nvidia
$665 Vol.
<1%
Tencent
$733 Vol.
<1%
Microsoft
$831 Vol.
<1%
This market will resolve according to the second-highest ranked Company based on the arena.ai Text Arena (Overall) (Style Control On) when the table under the "Leaderboard" tab filtered for "Labs" is checked on September 30, 2026, 12:00 PM ET.
Results from the "Lab Rank" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall?rankBy=labs with style control on (Adjustments: Style Control) and 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 their Arena score, including any underlying, unrounded, granular values reflected in the data below 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., if the two models are tied by exact arena score, “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 Text Arena (Overall). 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".Recent model releases have tightened the race for second-place AI lab status on arena.ai leaderboards heading into late September 2026. OpenAI’s GPT-6 Astra rollout on September 3 introduced advanced capabilities that reinforced its frontrunner position, while Anthropic’s Claude Fable 5.1 and Mythos 5.1 variants delivered strong Terminal-Bench gains and efficiency improvements. Google’s Gemini 3.7/3.8 Flash updates continue to post competitive benchmark results in scientific reasoning and agent tasks, supporting its market-implied edge. Meta’s open-weight Muse Spark momentum, alongside Chinese labs’ inference-focused releases, creates a fragmented field where small leaderboard shifts from style-control variants or new evaluations could alter rankings. Traders appear to weigh demonstrated performance, ecosystem integration, and release cadence as key swing factors amid ongoing uncertainty.
This market will resolve according to the second-highest ranked Company based on the arena.ai Text Arena (Overall) (Style Control On) when the table under the "Leaderboard" tab filtered for "Labs" is checked on September 30, 2026, 12:00 PM ET.
Results from the "Lab Rank" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall?rankBy=labs with style control on (Adjustments: Style Control) and 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 their Arena score, including any underlying, unrounded, granular values reflected in the data below 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., if the two models are tied by exact arena score, “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 Text Arena (Overall). 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 "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall?rankBy=labs with style control on (Adjustments: Style Control) and 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 their Arena score, including any underlying, unrounded, granular values reflected in the data below 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., if the two models are tied by exact arena score, “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 Text Arena (Overall). 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 24, 2026, 8:03 PM ET
Volume
$64,689End Date
Oct 1, 2026Market Opened
Jul 24, 2026, 8:03 PM ETResolution Source
https://arena.ai/leaderboard/text/overall?rankBy=labsResolver
0x69c47De9D...This market will resolve according to the second-highest ranked Company based on the arena.ai Text Arena (Overall) (Style Control On) when the table under the "Leaderboard" tab filtered for "Labs" is checked on September 30, 2026, 12:00 PM ET.
Results from the "Lab Rank" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall?rankBy=labs with style control on (Adjustments: Style Control) and 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 their Arena score, including any underlying, unrounded, granular values reflected in the data below 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., if the two models are tied by exact arena score, “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 Text Arena (Overall). 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".Recent model releases have tightened the race for second-place AI lab status on arena.ai leaderboards heading into late September 2026. OpenAI’s GPT-6 Astra rollout on September 3 introduced advanced capabilities that reinforced its frontrunner position, while Anthropic’s Claude Fable 5.1 and Mythos 5.1 variants delivered strong Terminal-Bench gains and efficiency improvements. Google’s Gemini 3.7/3.8 Flash updates continue to post competitive benchmark results in scientific reasoning and agent tasks, supporting its market-implied edge. Meta’s open-weight Muse Spark momentum, alongside Chinese labs’ inference-focused releases, creates a fragmented field where small leaderboard shifts from style-control variants or new evaluations could alter rankings. Traders appear to weigh demonstrated performance, ecosystem integration, and release cadence as key swing factors amid ongoing uncertainty.
This market will resolve according to the second-highest ranked Company based on the arena.ai Text Arena (Overall) (Style Control On) when the table under the "Leaderboard" tab filtered for "Labs" is checked on September 30, 2026, 12:00 PM ET.
Results from the "Lab Rank" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall?rankBy=labs with style control on (Adjustments: Style Control) and 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 their Arena score, including any underlying, unrounded, granular values reflected in the data below 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., if the two models are tied by exact arena score, “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 Text Arena (Overall). 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 "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall?rankBy=labs with style control on (Adjustments: Style Control) and 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 their Arena score, including any underlying, unrounded, granular values reflected in the data below 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., if the two models are tied by exact arena score, “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 Text Arena (Overall). 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
$64,689End Date
Oct 1, 2026Market Opened
Jul 24, 2026, 8:03 PM ETResolution Source
https://arena.ai/leaderboard/text/overall?rankBy=labsResolver
0x69c47De9D...Recent model releases have tightened the race for second-place AI lab status on arena.ai leaderboards heading into late September 2026. OpenAI’s GPT-6 Astra rollout on September 3 introduced advanced capabilities that reinforced its frontrunner position, while Anthropic’s Claude Fable 5.1 and Mythos 5.1 variants delivered strong Terminal-Bench gains and efficiency improvements. Google’s Gemini 3.7/3.8 Flash updates continue to post competitive benchmark results in scientific reasoning and agent tasks, supporting its market-implied edge. Meta’s open-weight Muse Spark momentum, alongside Chinese labs’ inference-focused releases, creates a fragmented field where small leaderboard shifts from style-control variants or new evaluations could alter rankings. Traders appear to weigh demonstrated performance, ecosystem integration, and release cadence as key swing factors amid ongoing uncertainty.
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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