Which company has best AI model end of June?

What you need to know

This market is asking: which AI company will have the single best-performing AI model on a specific public leaderboard by the end of June 2026? The leaderboard it uses — Chatbot Arena — ranks AI models based on millions of head-to-head votes from real users who compare two models side by side and pick the better answer. So 'best AI model' here has a precise, measurable definition: whoever sits at rank #1 on that leaderboard on June 30, 2026, wins. The three companies in the running are Anthropic, Google, and OpenAI. On June 30, 2026 at 12:00 PM Eastern Time, someone will check the Chatbot Arena leaderboard at lmarena.ai — specifically the text leaderboard with 'style control' turned off — and record which model holds the #1 rank. Whichever company owns that model wins. If two models are tied on rank, the tiebreaker goes to the higher Arena score, then to alphabetical order by company name. One edge case worth knowing: if the leaderboard website is down at that moment, the check is simply delayed until it comes back online. None of the provided news headlines are relevant to this market — they cover mining, personal injury law, and local shopping guides. There is no recent AI news to draw from here. The kinds of developments that would actually matter to watch are: new model releases from Anthropic, Google, or OpenAI in the coming weeks, and how those models perform when users vote on them in Chatbot Arena. The AI landscape moves extremely fast — a single new model release can shift the leaderboard dramatically within days. The market currently prices Anthropic at 84%, suggesting participants believe its models are leading right now, but a major release from Google or OpenAI before June 30 could change that. Chatbot Arena rankings also reflect human preferences, which can shift as models get updated. Over a year out, all three companies are expected to launch new models, so the main uncertainty is simply which release cycle lands closest to — and performs best by — the deadline.

The odds right now

• Anthropic+5.9 pts (1w)91%
• Google-5.0 pts (1w)7%
• OpenAI-0.2 pts (1w)3%
• Z.ai0%
• DeepSeek0%
• ByteDance0%
• Alibaba0%
• xAI-0.1 pts (1w)0%
• Meta0%
• Mistral-0.1 pts (1w)0%
• Microsoft-0.1 pts (1w)0%
• Amazon-0.1 pts (1w)0%

Price history

How this resolves

Resolves June 30, 2026

This market will resolve according to the company which owns the model which has the highest arena rank based off 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" section on the Leaderboard tab of https://lmarena.ai/leaderboard/text with the 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 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 resolve based on the first check after it becomes available. If it becomes permanently unavailable, this market will resolve based on another resolution source.

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