Anthropic's recent releases of Claude Opus 4.8 in late May and Claude Fable 5 on June 9 have driven the 88.5% implied probability, as both models currently lead composite quality indices, LMSYS-style arenas, SWE-bench coding tasks, and intelligence benchmarks ahead of OpenAI's GPT-5.5 family and Google's Gemini variants. These frontier large language models demonstrate superior agentic performance, long-context handling, and instruction following in third-party evaluations, creating strong trader consensus that no competitor will overtake the top ranking by the June 30 resolution. Limited time remains for rival launches or updates to shift the leaderboard, reinforcing the market's heavy weighting toward Anthropic while leaving modest room for unexpected Google or OpenAI gains.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedAnthropic 89%
Google 6%
OpenAI 3.8%
Meta <1%
$1,750,624 Vol.
$1,750,624 Vol.

Anthropic
89%

6%

OpenAI
4%

Meta
<1%

xAI
<1%

DeepSeek
<1%

Z.ai
<1%

Mistral
<1%

Microsoft
<1%

Amazon
<1%

ByteDance
<1%

Alibaba
<1%

Moonshot
<1%

Meituan
<1%

Baidu
<1%
Anthropic 89%
Google 6%
OpenAI 3.8%
Meta <1%
$1,750,624 Vol.
$1,750,624 Vol.

Anthropic
89%

6%

OpenAI
4%

Meta
<1%

xAI
<1%

DeepSeek
<1%

Z.ai
<1%

Mistral
<1%

Microsoft
<1%

Amazon
<1%

ByteDance
<1%

Alibaba
<1%

Moonshot
<1%

Meituan
<1%

Baidu
<1%
Results from the "Rank" column under the "Text Arena | Overall" Leaderboard tab at https://lmarena.ai/leaderboard/text with style control on will be used to resolve this market.
Models will be ordered primarily by their leaderboard rank at the market’s check time. 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 remains, alphabetical order of 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 “xAI”). This market will resolve based on the company that occupies first place under this ranking system.
The resolution source for this market is the Chatbot Arena LLM Leaderboard found at https://lmarena.ai/. If this resolution source is unavailable at check time, this market will remain open until the leaderboard comes back online and resolves based on the first check after it becomes available. If it becomes permanently unavailable, this market will resolve based on another resolution source.
Market Opened: Oct 10, 2025, 5:27 PM ET
Resolver
0x2F5e3684c...Results from the "Rank" column under the "Text Arena | Overall" Leaderboard tab at https://lmarena.ai/leaderboard/text with style control on will be used to resolve this market.
Models will be ordered primarily by their leaderboard rank at the market’s check time. 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 remains, alphabetical order of 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 “xAI”). This market will resolve based on the company that occupies first place under this ranking system.
The resolution source for this market is the Chatbot Arena LLM Leaderboard found at https://lmarena.ai/. If this resolution source is unavailable at check time, this market will remain open until the leaderboard comes back online and resolves based on the first check after it becomes available. If it becomes permanently unavailable, this market will resolve based on another resolution source.
Resolver
0x2F5e3684c...Anthropic's recent releases of Claude Opus 4.8 in late May and Claude Fable 5 on June 9 have driven the 88.5% implied probability, as both models currently lead composite quality indices, LMSYS-style arenas, SWE-bench coding tasks, and intelligence benchmarks ahead of OpenAI's GPT-5.5 family and Google's Gemini variants. These frontier large language models demonstrate superior agentic performance, long-context handling, and instruction following in third-party evaluations, creating strong trader consensus that no competitor will overtake the top ranking by the June 30 resolution. Limited time remains for rival launches or updates to shift the leaderboard, reinforcing the market's heavy weighting toward Anthropic while leaving modest room for unexpected Google or OpenAI gains.
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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