How to Install Gemini 4 Pro Argon? Who Can Use It?

You do not need to install Gemini 4 Argon; the model runs on Google's servers and, since October 13, 2026, it is available in the Gemini app to Google AI Pro and Ultra subscribers. In Antigravity, paid Pro and Ultra subscribers can use it too, but on Pro, Argon has a separate, weekly-only quota (details below). Free users are left out for now. On day one (September 30) only approved cyber defenders could use it; the first version of this post covered that period, and this one gives the current picture.

November 14 update: has Argon opened to everyone? No. The model Google opened "to everyone" on November 12 is not Argon but the fast, cheaper member of the family, Gemini 4 Hydrogen. Nothing has changed for Argon: Google DeepMind's model page still says "Google AI Pro and Ultra subscribers," Antigravity's model table does not tick Argon in the Free and Google AI Plus column, and the API pricing page says Argon is not on the free tier. Meanwhile Gemini 4 Carbon went generally available on November 10, but in the apps only for Ultra subscribers. If you are looking for a free route, see Is Gemini 4 Hydrogen free, and who can use it.

November 1 update: The first reports said Argon in Antigravity was open to Ultra only. Google later opened it to Pro subscribers as well, and I have corrected this post accordingly.

This is a news and guide post; I have not tested the model myself. The information comes from Google's announcements and independent write-ups. Sources are at the end. To learn what the model is, start with What Is Gemini 4 Pro (Argon)?.

The name issue: Pro or Argon?

The official name is Gemini 4 Argon. "Pro" is not a name Google uses; the community uses it based on naming in earlier generations. There is another source of confusion: here "Pro" and "Ultra" are not model names but Google AI subscription plans. "Open to Ultra users" means subscribers on the Ultra plan.

Who can use it right now?

Route	Who	Note
Gemini app	Google AI Pro and Ultra subscribers	Since Oct 13, 2026; Google says "starting today"
Antigravity	Google AI Pro and Ultra subscribers, enterprise accounts	Per the model table, Pro needs a paid plan or a trial that came with an eligible premium device. Not on Free or Google AI Plus
Orchestrator (Argon) in Antigravity	Pro and Ultra	Arrived Nov 12: Argon plans, Hydrogen implements. See What is Antigravity Orchestrator
AI Mode in Search	Pro and Ultra	According to WinBuzzer
API (Google AI Studio, enterprise agent platform)	Paying developers and businesses	According to the Gemini API changelog, gemini-4-argon went generally available on Oct 13. Per the pricing page it is not on the free tier
Scientists and researchers	By application	Google opened an application route that gives Antigravity's highest usage tier free for six months; it covers Argon and Carbon
Fairwind Program	Approved cyber defenders	Since Sept 30, version with relaxed cyber protections

As of November 14 there is still no access announcement for free Gemini users or Google AI Plus subscribers; the Gemini 4 model opened to them is Hydrogen. The rollout may not reach everyone at once: Android Police's author, a Pro subscriber, wrote that they did not see the model on day one. If you cannot see it in your account, wait a few days.

The Gemini app update also brought a toggle between chat and tasks, connections to more than 40 apps, and Antigravity's coding interface in the macOS app. Google also says Argon answers more directly, with less repetition and hedging.

Antigravity for Pro subscribers: a separate, weekly-only quota

WinBuzzer's October 14 report showed Argon in Antigravity as Ultra only. Google's Antigravity post then announced Argon for Pro and Ultra subscribers, and 9to5Google wrote on October 15 that the rollout was visible on Pro accounts. According to TechCityAuthority, Google's Antigravity account also announced the same day that the model was open to paid Pro subscribers.

The real detail is the quota. As 9to5Google relays it, Google gives Pro subscribers a separate, weekly-only Argon quota in Antigravity, on top of the existing Gemini 3.8 Flash quota. Google has not said how large it is. What we have:

• The five-hour refresh is unclear. Google's plans page describes the Pro quota in general as "refreshed every five hours until the weekly limit is reached." For Argon the wording is "weekly-only." Several write-ups read that as "no five-hour refresh for Argon": when the quota runs out you wait for the weekly reset or use credits. Google does not confirm this in writing, so it is an interpretation. Watch the quota meter in your own account to find out.
• Heavier tasks use more. According to the plans page, limits correlate with the amount of work the agent does; more complex tasks consume more quota. How many tasks the same quota covers depends on the task.
• Credits. On Pro and Ultra, purchased AI credits cover usage above the baseline quota. If the "AI Credit Overages" setting is "Never," Antigravity waits for the reset instead of spending credits. The plans page does not say explicitly that this setting applies to Argon's separate quota.
• Who is left out. Free and Google AI Plus plans are excluded. According to SmartScope, Argon also could not be used while you were on Pro's free trial (see the November 14 note below for the current state).
• Where to select it. According to SmartScope, you pick it from the model menu below the chat box in the desktop app, or with the /model command in the CLI. The same write-up says Argon is not supported in the standalone Antigravity IDE; if you cannot see it in the menu, check that first.

The picture in the Gemini app is similar: as LimitDigest relays Google's help page, limits are compute-based, vary with prompt complexity, model and chat length, and refresh every five hours up to a weekly cap. Google publishes no message counts.

November 14 note: The current version of Antigravity's plans page does not mention an Argon-specific quota. For Pro it says "a high, generous quota, refreshed every five hours until the weekly limit is reached," for Ultra "the highest, most generous quota, refreshed every five hours"; the "refreshed weekly" wording appears only for plans other than Pro and Ultra. I could not confirm from Google's pages whether the separate weekly Argon quota that 9to5Google relayed in October still exists; read the bullets above as the mid-October picture and check the quota meter in your own account. The trial rule has also changed in the table: for Argon the model table says "paid Google AI Pro plans or on trial with eligible premium devices," so some trials are now covered.

There is also a new way to stretch the quota: the Orchestrator (Argon) option that arrived on November 12 hands planning to Argon and the code writing to the cheaper Hydrogen, and it is open on Pro too. I explain how it works in What is Antigravity Orchestrator.

I cannot tell you whether Pro's Argon quota is enough to run an agent all day; Google has not published numbers, so I will not guess. A practical suggestion: try it on Pro for a week with your own task, see how much of the quota it uses, and only then consider Ultra.

The Fairwind Program: who can apply?

According to Google DeepMind's Fairwind page, priority goes to these groups:

• Governments and national cyber authorities
• Critical infrastructure operators such as healthcare, telecom, energy and finance
• Technology organizations that run core software platforms
• Academic labs doing defensive benchmarking

Applicants are expected to have:

• A record of ethical work and research (Google reviews the applying organization's security history)
• Phishing-resistant multi-factor authentication, user verification and access control
• Access limited to cybersecurity, incident response or penetration testing teams

The rules are also clear: access cannot be shared, transferred or sold. Permitted uses are defense and academic threat simulation, reverse engineering and malware analysis. Creating malware is prohibited. Program participants can optionally get CodeMender, the automated code security agent, as well.

For applications, the Fairwind page currently says "contact your Cloud account team"; if you are not a Cloud customer it points you to the getting-started documentation. In the first version of this post I mentioned an application form; the page appears to have changed since. Google says it will "get back to eligible partners as soon as possible" but gives no timeline. If you are an individual developer, this program is not for you; applications are made on behalf of an organization. Gemini 4 Carbon, which Google announced on October 28, opened the same way, to cyber defenders first, and went generally available on November 10.

Which subscription do you need?

• Trying Gemini 4 without paying: Not possible with Argon. The free model is Gemini 4 Hydrogen: in the Gemini app through automatic model selection, in Google Search, and on the API's free tier.
• Just chatting and trying the model: Google AI Pro is enough.
• Coding with an agent in Antigravity: Possible with paid Pro; Argon has a separate weekly quota, but its size is not known. Ultra's general limits are higher (Google's plans page says "the highest weekly rate limits"), but no Argon-specific figure has been published. For trials, the model table requires a "trial with eligible premium devices."
• Building an app: No subscription needed, but you need an API key and billing. The intro price is $2 per million input tokens and $10 for output through November 30; from December 1 it is $4 and $20 (Google's pricing page still showed the same dates on November 14). On the same page Hydrogen is $1.50 and $7.50.
• If you want the strongest model: Carbon is Ultra only in the apps; in the API it is open to paying developers.

How to get ready

1. Pick a plan. You can start with Pro in both the Gemini app and Antigravity. If the weekly quota is not enough, read the price and terms of Ultra on Google's plan page.
2. Install Antigravity. It runs on Windows 10 and later, macOS Monterey 12 and later, and 64-bit Linux with glibc 2.28+.
3. Get a Gemini API key and check Argon's ID in the model list in Google AI Studio.
4. Do the cost math. Because the output limit is 1 million tokens, even a single long task can cost more than you expect. Do not start a long agent loop without a budget cap.
5. Write your own test task. Instead of looking at benchmarks, pick a real task from your own codebase and run the same task across models. I described a simple framework for that in What Is an AI Harness? The DeepSeek Example.

If you use an agent like Hermes Agent, that tool supports Google Gemini as a provider. Adding a new model ID is usually a change in the provider settings; I have not tried that with Argon. To install Hermes, see What Is Hermes Agent? How to Install.

Watch out: fake install pages

Around a new, staged-rollout model, "download" and "free install" pages show up fast. If you see any of these signs, close the page:

• Pages outside the official domain that ask you to download a "Gemini 4 installer" or an .exe / .dmg
• Non-Google forms that ask you to sign in with your Google account for "early access"
• Offers selling shared "API keys" or "accounts". Selling or transferring Fairwind access is prohibited anyway

The only reliable sources are Google's own blog, the DeepMind pages and the model list in Google AI Studio and Vertex AI.

Frequently Asked Questions

How can I download Gemini 4 Pro?

There is no version to download. The model runs on Google's servers and its weights have not been published. You use it through the Gemini app, Antigravity or the API.

Is Gemini 4 Argon only for Ultra subscribers?

No. Paid Pro and Ultra subscribers can use it in the Gemini app and in Antigravity. The first reports said Ultra only for Antigravity; Google later opened it to Pro as well. There is no announcement for free users or Google AI Plus.

Is Gemini 4 Argon available in Antigravity?

Yes, for paid Pro and Ultra subscribers. On Pro, Argon runs on a weekly-only quota that is separate from the Gemini 3.8 Flash quota; Google has not said how large it is.

What is the weekly limit for Argon on a Pro subscription?

Google has not published a figure. What is known: the quota is separate and described as "weekly-only," more complex tasks use more of it, and when it runs out you wait for the reset or (depending on a setting) use AI credits. Whether the five-hour refresh also applies to Argon, Google does not say.

Can I apply to the Fairwind Program as an individual?

The application is designed for organizations: governments, critical infrastructure operators, technology platforms and academic labs. No route is stated for individual developers; you can now reach the model through the Gemini app anyway.

Has Gemini 4 Argon opened to everyone?

No. As of November 14, 2026, Argon is still open to Google AI Pro and Ultra subscribers and to paying API users. The model that opened to everyone on November 12 is Gemini 4 Hydrogen.

Is it free?

No. The Gemini app requires a paid plan; the API is pay-per-use and Argon is not on the free API tier. The free option is Gemini 4 Hydrogen.

Sources

• Google DeepMind, Gemini models (checked November 14, 2026): the sentence that Argon is available to Pro and Ultra subscribers, the six-month application for scientists.
• Google Antigravity, Choose a model (checked November 14, 2026): model table by plan, trial footnote, Orchestrator rows.
• Google, Gemini API pricing (checked November 14, 2026): Argon not on the free tier, the November 30 and December 1 prices, Hydrogen's price.
• Google, Introducing Gemini 4 Hydrogen (November 12, 2026): the model opened to everyone is Hydrogen.
• Google, Gemini 4 Carbon is now available (November 10, 2026): Carbon's general availability and the Ultra requirement.
• Google, Gemini 4 Argon is now available in the Gemini app (October 13, 2026): access for Pro and Ultra subscribers, new features.
• Google Antigravity, Gemini 4 Argon in Google Antigravity: rollout for Pro and Ultra subscribers.
• 9to5Google, Gemini 4 Argon is now rolling out to Google's Antigravity for AI Pro subscribers (October 15, 2026): separate, weekly-only Argon quota for Pro.
• TechCityAuthority, Antigravity brings Gemini 4 Argon to Google AI Pro, with weekly limits (October 16, 2026): reading of the five-hour refresh, credit setting.
• Pasquale Pillitteri, Gemini 4 Argon arrives in Antigravity for AI Pro with a separate quota: the "Argon's quota for Pro is weekly only" wording and the note that Google does not state a five-hour refresh.
• SmartScope, Antigravity: Gemini 4 Argon availability: paid-subscription requirement, model selection, standalone IDE note.
• Google Antigravity, Plans (rechecked November 14, 2026): Pro and Ultra quota, how heavier tasks consume it, AI credits.
• LimitDigest, Gemini 4 Argon usage limits (November 1, 2026): limit structure in the Gemini app; note that Google publishes no message counts.
• WinBuzzer, Google Releases Gemini 4 Argon for Longer AI Work (October 14, 2026): AI Mode, API access and pricing dates. Its "Ultra only" statement for Antigravity has since changed.
• Android Police, Gemini 4 Argon is here: note that the rollout is not reaching everyone at once.
• Google, Gemini 4 Argon: our next era of frontier intelligence (September 30, 2026): original announcement, staged access plan, safety rationale.
• Google DeepMind, Fairwind Program: eligibility terms and how to apply (checked November 1, 2026).
• Google, Gemini API changelog (checked November 1, 2026): the October 13 GA entry for gemini-4-argon.
• Wikipedia, Google Antigravity: supported operating systems.