Which organization will have the #1 model on the arena.ai Text leaderboard (formerly LMArena) at the end of October 2026?

Resolution source: https://arena.ai/leaderboard/text, in its default view as the site displays it.

How it resolves:

• Resolves to the organization credited with the model in the #1 position (highest displayed score) as of 11:59pm Pacific Time, October 31, 2026. I will check the live page on Nov 1 and use an archive.org snapshot from Oct 31/Nov 1 if there is any dispute.

• The organization is the one arena.ai lists for the model. Models count for their lab whatever the model family is called (e.g. Claude → Anthropic, Gemini → Google, GPT → OpenAI, Muse → Meta, Grok → xAI).

• If two models share rank 1, the higher displayed score wins. If the displayed scores are exactly equal and the models come from different organizations, the market resolves equally between those organizations.

• Anonymous or codename models count only if arena.ai attributes them to an organization on the leaderboard. Otherwise they are ignored.

• Any organization not listed resolves to Other.

Where things stand (leaderboard updated Sep 25, 2026): Anthropic holds ranks 1-6 (claude-opus-5.5-high at 1509). Meta's muse-spark-1.2 is #7 (1496), Google's gemini-3.8-flash-high is #10 (1492), and OpenAI's best, gpt-5.6-sol-xhigh, is #19 (1483). Gemini 4 Pro is widely reported to be targeting an October launch, but Google has not announced a date.

The creator may trade on this market only under their own position rules (no trades within 7 days of creation).