Which company has the best AI Agent end of September?: how this market works

What you need to know

This market is asking which company will have the single best AI agent in the world by the end of September 2026, as judged by one specific public ranking. An AI agent is a program that can take actions on your behalf, like browsing the web, writing code, or completing multi-step tasks automatically. A Yes for Anthropic means their model sits at the top spot on that leaderboard on the deadline. A Yes for OpenAI or Xiaomi means one of them knocked Anthropic off that top position. The market settles based on one snapshot: whoever holds rank number one on the Agent Arena Leaderboard at arena.ai on September 30, 2026 at 12:00 PM Eastern Time wins. The leaderboard is filtered specifically for the 'Models' view under the 'Agent Arena' tab. If two models tie, the one listed higher on the page wins. If the website is down that day, the market waits until it comes back online rather than resolving early. None of the provided news headlines are relevant to this market. The stories cover a pharmaceutical approval, a poem, Intel earnings, a lifestyle article, and an Indian data center investment. To follow this market meaningfully, watch for new AI agent model releases from Anthropic, OpenAI, or Xiaomi, and for updates to the Agent Arena Leaderboard rankings themselves. The market currently prices Anthropic at about 79%, meaning the crowd considers them the frontrunner, but this is a 14-month window in one of the fastest-moving fields in technology. A single new model release from any company can shift the leaderboard dramatically. Xiaomi's 15% share is also notable and somewhat surprising for a consumer electronics company, suggesting their models may already be competitive. The biggest unknowns are which major model launches are still coming and how the leaderboard's voting community will rate them.

The odds right now

• Anthropic84%
• OpenAI7%
• ByteDance4%
• Meituan4%
• Mistral3%
• MiniMax3%
• Xiaomi3%
• Amazon3%
• Moonshot3%
• Baidu3%
• Microsoft3%
• Meta3%

Price history

How this resolves

Resolves September 30, 2026

This market will resolve according to the company that owns the model that has the highest rank based on the Agent Arena Leaderboard (https://arena.ai/leaderboard/agent) when the table under "Agent Arena" filtered for "Models" is checked on September 30, 2026, 12:00 PM ET. Results from the "Rank" column under the "Agent Arena" Leaderboard tab at https://arena.ai/leaderboard/agent filtered for "Models" will be used to resolve this market. Read the full resolution rules on the live market page.

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