Will the next Google Gemini Pro model added to the Arena Leaderboard debut at a score of at least 1490?

- [2026-09-30] Arena's leaderboard changelog shows gemini-4-argon-high was added to the Text, Agent and WebDev leaderboards on this date. Its name has no "Pro" label. It is Google's most recent frontier addition, so it probably does not count as the "next Gemini Pro model" under the rules. How the market's resolver treats it is unclear. https://arena.ai/company/leaderboard-changelog - [2026-09-30] Arena posted that Gemini 4 Argon (High) debuted #1 in Text Arena with 1525 points. That is +20 over #2 Claude Opus 4.6 (High) and well above Google's previous release, Gemini 3.8 Flash (High) at #11. https://x.com/arena/status/2105394855644139908 - [2026-10-08] The live Text leaderboard (overall, style control off) still lists gemini-4-argon-high at #1 with 1525 ±9 and marks it "Preliminary". It has 4,892 votes and costs $2/$10 per million tokens. Claude Opus 5.5 high is #2 at 1507. The top of the board is about 1500–1525. https://arena.ai/leaderboard/text - [2026-09-30] Google announced Gemini 4 Argon, limited to vetted cyber defenders in the Fairwind program. It does not appear in the public Gemini API list as of Oct 6, and Google has given no date for wider release. https://www.rdworldonline.com/googles-overdue-gemini-4-argon-reaches-the-frontier-with-mixed-results-for-science/ - [2026-10-03] Gemini 3.5 Pro never shipped. It was announced at I/O on May 19 with a "next month" target, and it missed June, mid-July and early August. The "3.5 Pro coming soon" label was still on Google's Pro page on Oct 3, with no model card or pricing. Google has not formally cancelled it. https://aiwiz.uk/blog/gemini-3-5-pro/ - [2026-07-21] Google said Gemini 3.5 Pro was in partner testing and would be broadly available when ready. A Bloomberg report, cited secondhand, said internal performance goals had delayed it. https://windowsforum.com/windows-news.4/gemini-3-5-pro-no-launch-date-or-verified-lm-arena-test.441354/ - [2026-07-31] Community posts said gemini-3.5-pro briefly appeared in Arena blind testing and was removed. This is unverified, since the sources are X and Discord posts and one outlet. A Gemini 3.5 Pro leaderboard entry has not been confirmed. https://x.com/AiBattle_/status/2083071686039961860 - [2026-02-19] The last Pro model on record is Gemini 3.1 Pro, which Wikipedia lists as the current stable Pro. A third-party tracker put Gemini 3.1 Pro Preview at about 1505 in August. Gemini 3 Pro debuted at 1501 in Nov 2025, per Yahoo/Google. https://en.wikipedia.org/wiki/Google_Gemini - [2026-10-06] Gemini 3.8 Flash (released Sept 2) was replaced in Arena's battle pool by Argon. Google's latest Flash-tier models sit well below the top: Gemini 3.6 Flash was #23 and 3.8 Flash was #11 on Arena text. This suggests Flash models don't qualify and Pro-tier scores are what matter. https://x.com/ash_twtz/status/2107432082041602359 - [2026-10-09] Recent changelog entries (Oct 2–9) contain no Gemini Pro addition. The only Google additions were Argon (Sept 30) and nano-banana-2.1 (image, Oct 6). No Pro-labeled Gemini entry is visible as of Oct 9. https://arena.ai/company/leaderboard-changelog - [2026-10-12] No announced or scheduled Gemini Pro release date was found before the market closes on 2027-01-01. The scores above show that a Pro model on par with Argon would clear 1490, and that the recent top-of-board Gemini Pro scores are around 1500. https://arena.ai/leaderboard/text BOTTOM LINE: The key unknown is whether gemini-4-argon-high (1525, added Sept 30, not labeled "Pro") counts. It likely doesn't, and Gemini 3.5 Pro or a Gemini 4 Pro-labeled model is still pending with no date. If a Pro model arrives, its score would likely be near or above 1490 given the current top-of-board scores. The main risk to Yes is that no qualifying model is added before Dec 31, 2026. NOT FOUND: any announced release date for a Gemini 3.5 Pro or Gemini 4 Pro model, or any Arena "Pro"-labeled Gemini entry added after Feb 2026. I also found no confirmation that Argon is formally a "Pro" tier, and no official Arena statement on 3.5 Pro testing.

- [2026-10-12] Gemini 4 Argon is not labeled "Pro." Arena's changelog shows `gemini-4-argon-high` was added on 2026-09-30 to the Text, Agent and WebDev boards. The market covers only models labeled "Pro", so Argon probably doesn't count. I could not confirm how the live board labels it. Another page says Argon landed Oct 6, which conflicts with the changelog's Sep 30 entry. https://arena.ai/company/leaderboard-changelog - [2026-09-30] Arena posted that Gemini 4 Argon (High) landed #1 in Text with 1525 points, about 20 above Claude Opus 4.6 (High). Its previous Google release, Gemini 3.8 Flash (High), was #11. If a Gemini 4 "Pro" ships later, this is the nearest comparable score. https://x.com/arena/status/2105394855644139908 - [2026-10-03] Gemini 3.5 Pro was promised for June 2026 and never shipped. Google announced Gemini 4 Argon on Sep 30. The 3.5 Pro "coming soon" label was still up on Oct 3, and 3.5 Pro was not in the API model list. Pichai said on the Jul 22 earnings call that Google "need[s] Gemini 4 as a larger base model". In September Kavukcuoglu said Google had stepped back from 3.5 Pro to focus on Flash. SemiAnalysis reported in August that 3.5 Pro had been quietly dropped; that is a report, not confirmed. https://aiwiz.uk/blog/gemini-3-5-pro/ - [2026-10-12] The newest Pro on the board is Gemini 3.1 Pro Preview. Its release was announced Feb 19, 2026. Google's own Gemini page lists 3.1 Pro as the stable Pro release. No new Pro model has appeared on the Arena changelog through Oct 9. https://en.wikipedia.org/wiki/Google_Gemini - [2026-02-19] Base rate, Gemini 3.1 Pro: it debuted at 1500 in Text and was tied #1. Arena described it as 4 points behind Opus 4.6. Third-party tables show a 1489 figure, probably an earlier or style-control reading. https://x.com/arena/status/2024519891295089063 - [2025-11-18] Base rate, Gemini 3 Pro: it debuted at 1501 and was #1 in Text, about 50 points above Gemini 2.5 Pro. https://x.com/arena/status/1990813759938703570 - [2025-03-25] Base rate, Gemini 2.5 Pro: debuted #1, with a record +40 point jump over the prior leader. Its score was about 1440–1470; a third-party recap lists 1470, which I could not verify. https://x.com/lmarena_ai/status/1904581128746656099 - [2025-12-10] Gemini 3 Pro's score drifted to 1492 after about 15.9k votes, and one tracker shows 1486 by spring 2026. Scores can fall 10–15 points after debut. The market reads the score at 12:00 PM ET the day after first appearance, so this drift mostly doesn't apply. https://felloai.com/the-best-ai-of-december-2025/ - [2026-10-12] Score inflation is limited. Opus 4.6 was ~1503 in spring. Opus 5.5 High was 1507 (±8) on Oct 8, and Argon is 1525. Gemini 3.8 Flash (High) debuted at 1494, and Flash 3.7 was 1491. Even Flash models in the Gemini 3.x line were at or above ~1490. A Google Pro model released after Argon would likely be at least on par with the frontier. https://x.com/arena/status/2095179977805517149 - [2026-10-08] Per The Sweat, the Oct 8 board shows Argon at 1525 ±9, ahead of Claude Opus 5.5 High at 1507 ±8. Argon's score rests on only about 4.9k votes. https://thesweat.com/predictions/best-ai-model-of-2026/ - [2026-10-12] Timing is the main uncertainty. Resolution needs a new Pro-labeled Gemini to appear by Dec 31, 2026. Past Pro-labeled gaps were about 7 months (2.5 → 3) and about 3 months (3 → 3.1). 3.5 Pro has been dropped or delayed, and Google's flagship effort is now Gemini 4. The "Pro" tier name for Gemini 4 is unconfirmed. I found no official statement of a Gemini 4 Pro or a date for one. - [2026-10-12] Third-party aggregator chanceindex lists sibling strikes for this market, but the page is undated and may be stale. It shows ≥1480 at 91.7%, ≥1495 at 70.0%, ≥1500 at 39.5% and ≥1510 at 23.6%, with 1490 at 75.9%. It also says the headline contract ranged 30–83% over its life. It reflects the pre-Argon environment. https://chanceindex.com/odds/next-google-gemini-pro-model-arena-debut - [2026-10-12] The Manifold market (Oct 8) for the #1 company on Oct 31 had Google at 86%. It does not address the Pro-model question. https://manifold.markets/Terminator2/which-company-will-have-the-1-model BOTTOM LINE: All three prior Pro-labeled Gemini debuts scored 1470–1501, and they have scored higher with each generation. Frontier scores are now about 1505–1525, so a new Pro debuting at 1490 or above looks likely if one appears. The main risk is that no Pro-labeled Gemini is added by Dec 31, because 3.5 Pro is stalled, Argon is not labeled Pro, and any later Pro-labeled Gemini 4 model is unconfirmed. NOT FOUND: Any official announcement of a Gemini 4 Pro or other new Pro model with a date. The Arena label for Argon on the live board. Rumors of a Pro model debuting on Arena under a codename. Polymarket's own historical resolution record for this contract.

YES means: the next Gemini model labeled "Pro" to be newly added to the Arena Text leaderboard (style control off) shows a Score of 1490 or higher at 12:00 PM ET on the day after it first appears, and it appears by Dec 31, 2026. - [2026-10-09] Business Insider reported that Google employees are testing a newer Gemini 4 build, codenamed Carbon, internally. One employee said it "feels like Opus 5.5" for coding. The report says it is unclear whether Carbon would ship under the Argon name or as a separate Gemini 4 model. This is the most concrete sign of a further Gemini 4 model, and a follow-on model could be labeled "Pro". Source: https://cellcog.ai/blog/gemini-4-release-date/ - [2026-09-24] Kavukcuoglu said Gemini 4 was in early post-training and would launch "much earlier" than year-end, with an early post-training version out "as soon as possible". This is reported from The Information and 9to5Google, with no Google transcript. It supports a Gemini 4 wider release before Dec 31. Source: https://cellcog.ai/blog/gemini-4-release-date/ - [2026-09-30] Google said wider availability goes first to paid API customers and AI Ultra subscribers, with no date. Argon API pricing is introductory through Dec 31, 2026 and then doubles. That footnote implies Google plans a broad release inside 2026. The Arena listing for a "Pro" model could follow that release. Source: https://meetcody.ai/blog/gemini-4-argon-gemini-pro-delay/ - [2026-10-01] The leaderboard changelog entry reads "gemini-4-argon-high". The earlier Arena entry for Gemini 3.8 Flash reads "Gemini 3.8 Flash (High)". Neither carries a "Pro" label. Argon is the only Google text-model addition since Sept 2. If the resolver counts the Gemini 4-tier flagship as the "Pro" tier, it was already added on Sept 30 at 1525. That would be a Yes. This route is weak, because the question text requires a "Pro" label and one source says there is "no 'Pro' this time". Sources: https://news.lmarena.ai/leaderboard-changelog/ and https://getneotiler.com/blog/gemini-4-pro-release-date-leaked-specs-and-whats-actually-confirmed/ - [2026-09-17 to 09-26] Community posts and several outlets called the stealth "gemini-3.8-flash" Arena checkpoint a "Gemini 4 Pro" test. This is rumor, but the same checkpoint series then debuted at 1525 as Argon. That shows the Gemini 4 line tests well in Arena blind voting, with a 30-point margin over the 1490 threshold. Source: https://cellcog.ai/blog/gemini-4-release-date/ - [2026-08] The top of the board is in a tight 1500–1531 band. A third-party tracker put Claude Mythos 5 at 1531 on Oct 6. Any Pro that is competitive at the frontier lands above 1490. Even Gemini 3.8 Flash debuted at 1494 (per earlier reports). Source: https://www.swfte.com/lmarena - [2026-03] Gemini 3.1 Pro landed 3rd in Text Arena, just behind Claude Opus 4.6. This confirms that Pro-labeled Gemini debuts have sat at or near the top. Source: https://arena.ai/blog/march-2026-arena-updates - [2026-07-21] Google's own post said Gemini 3.5 Pro was "testing with partners" and would be broadly available when ready. It has not been cancelled, and a Jul 31 Arena sighting is unverified. A short-notice 3.5 Pro debut would need to score about 1490, a bar a 3.1 Pro successor should clear. Sources: https://cellcog.ai/blog/gemini-4-release-date/ and https://x.com/AiBattle_/status/2083071686039961860 - [2026-10-06] Arena's policy adds a preliminary score at launch for models released in Arena Direct Chat. Restricted-access models such as Argon (Fairwind only) were therefore listed without a public API. The same route lets a Pro debut on Arena before general availability, before Dec 31. Source: https://arena.ai/blog/policy BOTTOM LINE: The strongest YES path is a Gemini 4-family model (Carbon, or an Argon-tier release with a "Pro" label) or a late 3.5 Pro appearing on Arena by Dec 31. Such a model would very likely score at least 1490, given Argon's 1525 and the 1500–1531 top band. The weak point is timing and the "Pro" label, not the score. NOT FOUND: any Google statement that a Gemini 4 "Pro" tier exists, any Arena entry labeled Pro since Feb 2026, any dated Carbon or 3.5 Pro release, and the Business Insider page itself (secondhand via cellcog.ai). I could not fetch pasqualepillitteri.it.

YES means: the next Gemini model labeled "Pro" to be newly added to the Arena text leaderboard shows an overall score of 1490 or higher at 12:00 PM ET on the day after it first appears. This requires such a model to appear by Dec 31, 2026. - [2026-10-12] Arena's changelog, fetched in full, lists no Pro-labeled Gemini from Sept 5 to Oct 9. Gemini additions in that window are only gemini-4-argon-high (Sept 30) and nano-banana-2.1 (an image model, Oct 6). Arena also adds models in batches that mix Text, Agent, WebDev and Vision entries. A Pro-labeled Gemini would show up there as a separate entry. https://arena.ai/company/leaderboard-changelog - [2026-10-08] Argon is the only confirmed Gemini 4 variant. As of Oct 7, no official source confirms a Gemini 4 Pro, Flash or other variant. That means the next Gemini 4 entry on Arena may carry a non-"Pro" name, and the Polymarket text excludes anything "labeled only as" a non-Pro variant. Runtimewire (Oct 8) says Google has given no date for wider access and has not confirmed whether Pro app tiers get it. https://www.consens.io/topics/gemini-4-release-date and https://runtimewire.com/article/everything-we-know-about-google-s-gemini-4-argon - [2026-10-12] CellCog's tracker (Oct 11) says Gemini 4 "Pro" and "Flash" are leaker and community names with no Google product name. It also says Kavukcuoglu told The Information on Sept 23 that launch would be "much earlier" than year-end. The release-date estimates it cites are Nov/Dec from 9to5Google and TestingCatalog, and a rumored September launch did not happen. Argon is already on Arena, so a later general-availability release of Argon would probably not be a new entry. https://cellcog.ai/blog/gemini-4-release-date/ - [2026-10-03] Google's summer pattern points away from Pro. It skipped 3.5 Pro and shipped Flash-tier models on July 21 and Sept 2, and Kavukcuoglu said in September that it had stepped back from 3.5 Pro. Runtimewire says Google "skipped 3.5 Pro over the summer", and aiwiz says a 3.5 Pro launch "now looks unlikely". The "coming soon" label has no model card or pricing. https://aiwiz.uk/blog/gemini-3-5-pro/ and https://runtimewire.com/article/everything-we-know-about-google-s-gemini-4-argon - [2026-08-02] The July 31 report of "gemini-3.5-pro" on Arena rests on X and Discord posts and one outlet. WindowsForum noted that no preserved result, screenshot or statement from Google or Arena backs it. A model withdrawn from blind testing never reached the leaderboard, so that sighting does not count as an addition. https://windowsforum.com/windows-news.4/gemini-3-5-pro-no-launch-date-or-verified-lm-arena-test.441354/ - [2026-10-12] Arena publishes Google's top-end models under idiosyncratic names, such as "gemini-4-argon-high" with no "Pro". A future top-tier Gemini 4 model could do the same, even if Google markets it as the Pro tier. The market's resolver might read "labeled as Pro" strictly. Argon's own announcement had no tier at all, and Google says Argon is the "frontier model". The market text names gemini-2.5-pro, gemini-3-pro and gemini-3.1-pro-preview as examples. https://arena.ai/company/leaderboard-changelog - [2026-10-12] Deadline arithmetic: Argon had limited access from Sept 30 and no API date (Oct 5 trackers), with a U.S. government voluntary pre-release review still in progress per Runtimewire (Oct 8). Arena listed Argon at once, so Arena addition is not tied to public availability. Even so, the roughly 80 days left would have to cover a separate Pro-labeled model. Google released no Pro model in the 7.5 months after 3.1 Pro (Feb 19). https://runtimewire.com/article/everything-we-know-about-google-s-gemini-4-argon - [2026-10-12] Polymarket's own page (about 25 days old when indexed) describes 3.5 Pro as in "internal testing and limited preview" and sets the "no qualifying release by Dec 31" clause to No. It shows that a No by default is built into the contract's design. https://polymarket.com/event/next-google-gemini-pro-model-arena-debut - [2026-10-12] Score risk, secondary. If a Pro did arrive, it could be a smaller or cheaper tier below Argon. Google's recent non-flagship models debuted around 1491–1494 (Flash 3.7 and 3.8, per colleagues), which is only 1–4 points above the strike. The 1490 strike has little cushion there, and Arena's "Preliminary" scores can move. https://arena.ai/leaderboard/text BOTTOM LINE: The most likely path to No is that no Pro-labeled Gemini is added by Dec 31. Argon already took the flagship slot under a non-Pro name, 3.5 Pro is stalled or dropped, and Google has not confirmed any Gemini 4 Pro name. A strict label reading of any later Gemini 4 entry adds a second route to No. NOT FOUND: Any Google statement or leak of a dated Pro-labeled Gemini release or Arena codename in October–December 2026. Any official Arena or Google confirmation of the 3.5 Pro sighting. Whether Arena's live board labels Argon as "Pro". I could not retrieve the full list of changelog entries before Sept 5.