Anthropic’s June 9 release of Claude Fable 5 has propelled its models—Fable 5, Opus 4.8, and Mythos variants—to the top of most June 2026 leaderboards, including composite quality indexes and agentic coding benchmarks, establishing a clear edge over competitors. OpenAI’s GPT-5.5 Pro and Thinking variants sit immediately behind on reasoning and general tasks, while Google’s Gemini 3.1 Pro and 3.5 Flash lead select math or efficiency metrics but trail overall. With only days remaining until June 30 resolution and no major launches announced, trader sentiment centers on whether incremental updates or benchmark shifts can unseat Anthropic’s current lead before the cutoff.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$1,711,813 Vol.
Jun 30, 2026
OpenAI
No
DeepSeek
No
xAI
No
Anthropic
Yes
Meta
No
Mistral
No
Alibaba
No
Nvidia
No
Baidu
No
Z.ai
No
Meituan
No
$1,711,813 Vol.
OpenAI
$455,499 Vol.
No
DeepSeek
$287,512 Vol.
No
xAI
$594,365 Vol.
No
Anthropic
$257,971 Vol.
Yes
Meta
$30,984 Vol.
No
Mistral
$16,157 Vol.
No
Alibaba
$20,914 Vol.
No
Nvidia
$10,181 Vol.
No
Baidu
$12,315 Vol.
No
Z.ai
$20,598 Vol.
No
Meituan
$5,317 Vol.
No
This market will resolve to "Yes" if the listed company has the highest arena score on the Chatbot Arena LLM Leaderboard (https://lmarena.ai/) for any amount of time by June 30, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No."
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.Anthropic’s June 9 release of Claude Fable 5 has propelled its models—Fable 5, Opus 4.8, and Mythos variants—to the top of most June 2026 leaderboards, including composite quality indexes and agentic coding benchmarks, establishing a clear edge over competitors. OpenAI’s GPT-5.5 Pro and Thinking variants sit immediately behind on reasoning and general tasks, while Google’s Gemini 3.1 Pro and 3.5 Flash lead select math or efficiency metrics but trail overall. With only days remaining until June 30 resolution and no major launches announced, trader sentiment centers on whether incremental updates or benchmark shifts can unseat Anthropic’s current lead before the cutoff.
This market will resolve to "Yes" if the listed company has the highest arena score on the Chatbot Arena LLM Leaderboard (https://lmarena.ai/) for any amount of time by June 30, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No."
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.
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
Volume
$1,711,813End Date
Jun 30, 2026Market Opened
Dec 22, 2025, 5:28 PM ETResolver
0x65070BE91...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to "Yes" if the listed company has the highest arena score on the Chatbot Arena LLM Leaderboard (https://lmarena.ai/) for any amount of time by June 30, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No."
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.Anthropic’s June 9 release of Claude Fable 5 has propelled its models—Fable 5, Opus 4.8, and Mythos variants—to the top of most June 2026 leaderboards, including composite quality indexes and agentic coding benchmarks, establishing a clear edge over competitors. OpenAI’s GPT-5.5 Pro and Thinking variants sit immediately behind on reasoning and general tasks, while Google’s Gemini 3.1 Pro and 3.5 Flash lead select math or efficiency metrics but trail overall. With only days remaining until June 30 resolution and no major launches announced, trader sentiment centers on whether incremental updates or benchmark shifts can unseat Anthropic’s current lead before the cutoff.
This market will resolve to "Yes" if the listed company has the highest arena score on the Chatbot Arena LLM Leaderboard (https://lmarena.ai/) for any amount of time by June 30, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No."
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.
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.
Volume
$1,711,813End Date
Jun 30, 2026Market Opened
Dec 22, 2025, 5:28 PM ETResolver
0x65070BE91...Outcome proposed: No
No dispute
Final outcome: No
Anthropic’s June 9 release of Claude Fable 5 has propelled its models—Fable 5, Opus 4.8, and Mythos variants—to the top of most June 2026 leaderboards, including composite quality indexes and agentic coding benchmarks, establishing a clear edge over competitors. OpenAI’s GPT-5.5 Pro and Thinking variants sit immediately behind on reasoning and general tasks, while Google’s Gemini 3.1 Pro and 3.5 Flash lead select math or efficiency metrics but trail overall. With only days remaining until June 30 resolution and no major launches announced, trader sentiment centers on whether incremental updates or benchmark shifts can unseat Anthropic’s current lead before the cutoff.
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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