OpenAI

Full rules

As written on Polymarket for “Will OpenAI have a #1 AI model by December 31, 2026?”.

1. §1This market will resolve to "Yes" if the listed company has the highest arena rank based on the Chatbot Arena LLM Leaderboard (https://lmarena.ai/) by December 31, 2026, 11:59 PM ET.
2. §2Otherwise, this market will resolve to "No."
3. §3Results 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.
4. §4If a listed model ties for #1 Arena rank, it will suffice to resolve this market to "Yes."
5. §5The resolution source for this market is the Chatbot Arena LLM Leaderboard found at https://lmarena.ai/.
6. §6If this resolution source is unavailable at check time, this market will remain open until the leaderboard comes back online and will resolve based on the first check after it becomes available.
7. §7If it becomes permanently unavailable, this market will resolve based on another resolution source.