Second-best AI Lab end of September?: how this market works

What you need to know

This market asks which AI company will rank second on a specific public leaderboard called arena.ai Text Arena on September 30, 2026. The leaderboard ranks AI labs by how well their best models perform in head-to-head text conversations, as rated by real users. A win for Alibaba means their models are judged second-best overall by that measure; a win for Google or OpenAI means one of them holds that second spot instead. At 12:00 PM ET on September 30, 2026, someone checks the arena.ai Text Arena leaderboard, filters it to show labs only, and reads who sits in second place by lab rank. That company wins this market. If two labs are tied, the tiebreaker goes first to the underlying score numbers, then to alphabetical order of company names. One important edge case: if the leaderboard website is down that day, the market stays open until it comes back online. None of the news provided is relevant to this market. All five headlines are about mining and metals companies, with no connection to AI lab rankings or arena.ai. There is no recent news here to work with. Developments worth watching would be major new model releases from Alibaba, Google, or OpenAI, or any significant shifts in how those models perform in public AI benchmarks. The market is priced with Alibaba at 60%, which means the market leans toward them but is far from certain. The core challenge is that AI model rankings shift quickly: a single new model release from Google or OpenAI before September 2026 could change the standings. The leaderboard also reflects ongoing public votes, not a fixed test, so rankings can drift gradually. With over a year still remaining, there is plenty of time for the competitive picture to change considerably.

The odds right now

• Alibaba+40.1 pts (1w)53%
• Google-6.0 pts (1w)32%
• Mistral-19.2 pts (1w)16%
• OpenAI-10.5 pts (1w)8%
• Anthropic-28.7 pts (1w)5%
• Moonshot-30.3 pts (1w)5%
• Meta-34.1 pts (1w)3%
• Meituan-2.1 pts (1w)2%
• DeepSeek-10.9 pts (1w)2%
• Nvidia-32.5 pts (1w)2%
• Z.ai-33.2 pts (1w)1%
• SpaceXAI-17.0 pts (1w)1%

Price history

How this resolves

Resolves September 30, 2026

This market will resolve according to the second-highest ranked Company based on the arena.ai Text Arena (Overall) when the table under the "Leaderboard" tab filtered for "Labs" is checked on September 30, 2026, 12:00 PM ET. Results from the "Lab Rank" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall-no-style-control?rankBy=labs with style control off (Adjustments: None) and filtered for "Labs" will be used to resolve this market. Read the full resolution rules on the live market page.

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