Which Company Will Have the Best AI Model at the End of October? Latest News

Resolved Oct 31, 2026

Which Company Has the best AI model end of October

This market settled on October 31, 2026, so nothing below is tradeable. These are the last prices each venue published before settlement, not live quotes.

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Since the first article's chart, October 18 to October 31

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Background

This Polymarket market asks which company will have the best AI model at the end of October 2026, and it resolves on Oct. 31. Google is the main contender after launching Gemini 4 Argon on Oct. 13 and Gemini 4 Carbon on Oct. 28, which Artificial Analysis listed as #1 on its Intelligence Index with a score of 59. Rivals include OpenAI (GPT-6 Astra), Anthropic (Claude Opus 5.5 and Fable 5.1) and Meta (Muse Wonder Full).

The key dynamic is that the margin is thin. Ars Technica reported that Carbon leads rivals by only a few points and that frontier models score in a similar range. The reporting does not specify which leaderboard or methodology settles the contract, so check the market rules. A rival release or a revised score before Oct. 31 could shift the outcome, and Carbon is initially limited to select partners.

Oct. 30, 2026: Google Hits 97% for Best AI Model After Gemini 4 Carbon Launch

Google Hits 97% to Have the Best AI Model at End of October After Gemini 4 Carbon Launch

Google is the heavy favorite to have the best AI model at the end of October, priced at 97% on Polymarket on Oct 30, after it announced Gemini 4 Carbon on Oct 28. Google claims Carbon ranks #1 on the Artificial Analysis Intelligence Index v5.0 with a score of 59, and Artificial Analysis published Carbon as #1 on the index with that score on Oct 28. The launch landed three days before the Oct 31 resolution of the "Which Company Has the best AI model end of October" market.

Polymarket priced Google at 97% on Oct 30, up about 10 percentage points from 87% three days earlier. Carbon arrived 15 days after Gemini 4 Argon, which Google launched Oct 13 as its flagship with a claimed #1 ranking on the Vals Index. Carbon's benchmark claims extend past the index score: 88.2% on SEC-bench Pro, 54.8% on ExploitGym, 71.0% on CWE-bench and a #4 spot on WebDev Arena at 1768 Elo. ThursdAI's Oct 29 roundup led with Carbon as "the new #1."

Google's contract over 12 days, spanning the Oct 28 Gemini 4 Carbon announcement.

What Could Still Change the Gemini 4 Carbon Call Before Oct 31

The 97% price rests on a thin margin. Ars Technica reported that Carbon leads GPT-6 Astra, Claude Opus 5.5 and Claude Fable 5.1 by only a few points. It said every frontier model scores in a similar range and that Carbon may be a post-training upgrade of Argon.

Availability limits outside checks. Google is rolling Carbon out first to a subset of cyber defenders and trusted partners through its Fairwind Program, and it promises broader developer and consumer access "as soon as possible." Google is also taking part in the U.S. government's voluntary pre-release testing process. Introductory pricing is $2 per million input tokens and $10 per million output tokens, rising to $4 and $20 afterward. BenchLeader's release tracker logs Carbon among the past 30 days' launches.

The reporting reviewed here does not spell out the market's resolution source, so the 97% price should not be read as confirmation of which ranking methodology will decide the market. Traders should watch for any revision to Carbon's score and any rival model release that closes the few-point gap. A companion Polymarket contract, the style-control version of the #1 AI model market, tracks the same question under different ranking settings. Live prices across venues sit on the best AI model end of October odds page.

The market resolves Oct 31.

Earlier Updates

Oct. 21, 2026: Google's Best AI Model Odds Hit 80% After Gemini 4 Argon Launch

Google74% → 80%▲6

On Oct. 21, 2026, Google's implied probability of having the best AI model at the end of October rose from 74% to 80% over three days, following its Oct. 13 release of Gemini 4 Argon. Google says Argon ranks #1 on the Vals Index, though independent Artificial Analysis rankings reported by CNBC placed Anthropic's Claude Opus 5.5 and Claude Sonnet 5.5 ahead of Gemini 4.