Which company has second best AI model end of June?

Resolution Criteria

This market will resolve according to the company that owns the model with the second-highest arena rank based on the Chatbot Arena LLM Leaderboard (https://lmarena.ai/) when the table under the "Leaderboard" tab is checked on June 30, 2026, 12:00 PM ET. Results from the "Rank" column under the "Text Arena | Overall" Leaderboard tab at https://lmarena.ai/leaderboard/text with style control off 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 second 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 resolve based on the first check after it becomes available. If it becomes permanently unavailable, this market will resolve based on another resolution source.

Anthropic is the heavily dominant outcome in prediction markets for which company will hold the second-best AI model on the Chatbot Arena leaderboard at the end of June 2026, with volume heavily concentrated on that single outcome. Google is the only other contender attracting meaningful market attention. Resolution will be based on the official Chatbot Arena LLM Leaderboard rankings checked on 30 June 2026 at 12:00 PM ET.

Market structure

The market spans 19 possible outcomes across major AI developers, but volume is overwhelmingly concentrated on one outcome — Anthropic — with Google as a distant second. The remaining 17 outcomes, including OpenAI, xAI, DeepSeek, and Meta, attract only marginal support. Resolution is determined by the second-place rank in the 'Text Arena | Overall' leaderboard tab at lmarena.ai, with style control off, checked at a single fixed moment on 30 June 2026.

Background

Chatbot Arena, operated by lmarena.ai, has become one of the most cited independent benchmarks for comparing large language models. Unlike static benchmarks, it uses crowdsourced human preference votes in blind head-to-head comparisons, generating an Elo-style Arena score and rank. The leaderboard is dynamic — rankings shift continuously as new models are released and more votes accumulate. The contest for second place has historically been competitive, reflecting rapid development across leading AI laboratories. In recent periods, Anthropic's Claude models and Google's Gemini models have featured prominently in the upper tiers of the leaderboard, with OpenAI and others also regularly competing for top positions. The question of second place is particularly sensitive to timing, as major model releases or updates from any leading lab can quickly reshuffle rankings.

Key factors

The primary driver of resolution is the release calendar of the major AI laboratories. A significant new model from Google, OpenAI, xAI, or any other contender released before 30 June 2026 could displace Anthropic from second position, or push Anthropic further down the rankings. Conversely, an Anthropic model release could consolidate or strengthen its position. The benchmark's human-preference methodology means model quality as perceived by general users — not just technical benchmarks — determines rank. The specific cut-off mechanic matters: the leaderboard is checked at a single fixed time, so a model released days before the deadline could influence the result if it accumulates sufficient votes. The tie-breaking rules — Arena score, then alphabetical order by company name — could be decisive if two top models are close. The availability of the lmarena.ai site itself is a contingency the resolution criteria explicitly addresses, with a fallback to the next available check if the site is temporarily down.

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