Trader consensus on Polymarket assigns near-certainty to Anthropic holding the #1 spot on the LMArena Chatbot Arena leaderboard by June 30, driven by Claude Opus 4.7's sustained dominance with the highest Arena Elo score around 1500, bolstered by recent Dev Day announcements enhancing reasoning and agentic capabilities. OpenAI's GPT-5.5 release in early May mounted a challenge but failed to overtake, while Chinese open-weights models like DeepSeek V4 Pro narrowed the gap on cost and context length yet trail proprietary frontiers on core benchmarks. No major rival model launches are confirmed before deadline, though unannounced previews from Google Gemini or xAI Grok could shift dynamics; traders price low upset risk given historical leaderboard stability.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$1,556,684 Vol.

OpenAI
11%

Mistral
7%

xAI
6%

Meta
5%

Baidu
4%

Z.ai
3%

DeepSeek
2%

Alibaba
2%

Meituan
1%

Nvidia
<1%
$1,556,684 Vol.

OpenAI
11%

Mistral
7%

xAI
6%

Meta
5%

Baidu
4%

Z.ai
3%

DeepSeek
2%

Alibaba
2%

Meituan
1%

Nvidia
<1%
Results from the "Arena Score" section on the Leaderboard tab of https://lmarena.ai/ with the style control unchecked will be used to resolve this market.
If a listed model ties for #1 Arena score, it will suffice to resolve this market to "Yes."
The resolution source for this market is the Chatbot Arena LLM Leaderboard found at https://lmarena.ai/. If this resolution source becomes unavailable, the market will remain open until it is accessible again. If it becomes permanently unavailable, resolution will be based on another credible source.
Market Opened: Dec 22, 2025, 5:28 PM ET
Resolver
0x65070BE91...Results from the "Arena Score" section on the Leaderboard tab of https://lmarena.ai/ with the style control unchecked will be used to resolve this market.
If a listed model ties for #1 Arena score, it will suffice to resolve this market to "Yes."
The resolution source for this market is the Chatbot Arena LLM Leaderboard found at https://lmarena.ai/. If this resolution source becomes unavailable, the market will remain open until it is accessible again. If it becomes permanently unavailable, resolution will be based on another credible source.
Resolver
0x65070BE91...Trader consensus on Polymarket assigns near-certainty to Anthropic holding the #1 spot on the LMArena Chatbot Arena leaderboard by June 30, driven by Claude Opus 4.7's sustained dominance with the highest Arena Elo score around 1500, bolstered by recent Dev Day announcements enhancing reasoning and agentic capabilities. OpenAI's GPT-5.5 release in early May mounted a challenge but failed to overtake, while Chinese open-weights models like DeepSeek V4 Pro narrowed the gap on cost and context length yet trail proprietary frontiers on core benchmarks. No major rival model launches are confirmed before deadline, though unannounced previews from Google Gemini or xAI Grok could shift dynamics; traders price low upset risk given historical leaderboard stability.
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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