Which AI Will Be the Best at the End of 2026? Latest News

Live market odds

1 venue

Best AI at the end of 2026?

Each outcome's chance, from what traders are paying right now on Kalshi.

ClaudeIn this story

22%

Kalshi4.46x22.4¢

Gemini

72%

Kalshi1.39x71.7¢

ChatGPT

5%

Kalshi20.41x4.9¢

Muse

1%

Kalshi71.43x1.4¢

Grok: under 1% eachShow all

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Background

Kalshi's "Best AI at the end of 2026?" market asks which AI model will rank first on the LMArena text leaderboard, with style control removed, on Dec. 31, 2026. The main contenders are Anthropic's Claude, led by Claude Opus 5.5, and Google's Gemini models, including Gemini 4 Argon and Gemini 4 Carbon. OpenAI's GPT-6 models also feature on rival rankings.

The rule that matters most is that only the LMArena text #1 on that single date counts. Wins on other scoreboards, such as the Artificial Analysis Intelligence Index, where Opus 5.5 ranks first, and product launches or enterprise deals do not count toward resolution. The sources do not specify the exact time or timezone of the check and name no scheduled model release before year-end, so read the full contract terms.

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Oct. 31, 2026: Is Claude the Best AI? Its Odds Fall to 39% Despite an Index Win

Is Claude the Best AI Right Now? Not on the Leaderboard That Settles This Market

No, not on the leaderboard that resolves the Kalshi "Best AI at the end of 2026?" market. It settles on the LMArena text leaderboard (style control removed) on Dec. 31, 2026. On the main LMArena Text Arena as of the Oct. 28 board, Gemini 4 Carbon (High) is first and Gemini 4 Argon is second, per whatisthelatest.ai. A separate English-only view shows Argon at 1529 ahead of Claude Opus 5.5 at 1521 on Oct. 31, per llmbenchmark.ai. On a different scoreboard, the Artificial Analysis Intelligence Index v5 released Oct. 27, Opus 5.5 ranks first.

Kalshi traders priced Claude at 39% on Oct. 31, down about 6 percentage points from 45% over three days.

Why Claude Opus 5.5's Index Win Doesn't Settle the Best AI Market

The two rankings measure different things. LMArena text aggregates head-to-head human preference votes. The Artificial Analysis index scores models on a battery of tests, 60% of which are held out. On that index Opus 5.5 scored 58, one point ahead of OpenAI's GPT-6 Astra at 57 and three ahead of GPT-6.1 Sol at 55, with Anthropic and OpenAI filling the top five, per Artificial Analysis.

The index win carries no weight in resolution. Opus 5.5's reputation for leading agentic coding at 40% lower running cost than Opus 5 likewise does not count. Only the LMArena text #1 on Dec. 31 does.

What Could Move Claude's Best AI Odds Next

Gemini models holding the LMArena text top spot through December would support the lower price. A reversal requires Opus 5.5, or a later Claude model, overtaking them on that leaderboard. Anthropic's recent cadence (Sonnet 5.5 on Sep. 28, Haiku 5.5 on Oct. 7, the Claude Duet agent preview Oct. 21 to 23) shows frequent releases, but the sources name no scheduled Claude model launch before year-end. Live prices for every outcome sit on the Best AI at the end of 2026 odds page.

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Earlier Updates

Oct. 28, 2026: Claude's Odds of Best AI in 2026 Hit 60% as Gemini Leads Arena

Claude52% → 60%▲8

On Oct. 28, 2026, Anthropic announced a 40% discount on Claude Enterprise, Claude for Government and the Claude API as part of an expanded GSA partnership, which Anthropic estimates will save the government $1 billion. The same week it also launched Claude for Financial Advisors, but Google's Gemini 4 Argon has held first place on the LMArena text leaderboard since about Oct. 13, and the market resolves on that ranking.