Gemini 4 Argon lands in Antigravity for AI Pro and Ultra, with its own weekly quota

Google has started rolling out Gemini 4 Argon, its newest flagship model, inside Antigravity, its agent-based coding platform. Paying Google AI Pro and Ultra subscribers get it in the desktop app and CLI. Google announced the rollout on October 13, 2026, and 9to5Google reported on October 15 that Pro accounts were actively receiving it.

Image: Google · Source: antigravity.google

What Gemini 4 Argon in Antigravity includes

According to the Antigravity team's blog post, Argon is now available in two places for individual subscribers: the Antigravity desktop app and the Antigravity command-line tool. Both Google AI Pro and Google AI Ultra plans are covered.

For companies, Google lists two routes. Argon can be called through the API on the Gemini platform, and it is also available inside Antigravity for organizations on eligible Gemini Enterprise subscriptions.

Google positions Argon as a model for difficult, multi-step work. The post highlights real-world software engineering, enterprise knowledge tasks such as legal and finance work, and cybersecurity defense as its strongest areas. Google also says Argon is aimed at the hardest problems, and that it expects later models to serve as lighter everyday options for a wider group of builders.

How Google says it uses Argon internally

The blog leans heavily on Google's own engineering teams as evidence. Google says more than 100,000 people across Alphabet use Argon each month through an internal version of Antigravity. Over a four-week window, the company reports a 35% rise in agent-written code and a 30% drop in changes that had to be rolled back after submission.

Some of the examples Google gives:

• YouTube comments: Argon traced production profiling data and helped cut the CPU footprint of the comments frontend roughly in half, after finding that redundant emoji rendering caused close to 45% of server overhead.
• Bug backlog cleanup: Agents reviewed 134 open bug reports, checked commit histories and live telemetry, and closed 97 stale or duplicate tickets in under three hours.
• Legacy code migration: A team used a custom Antigravity skill to have Argon rewrite a Fortran research codebase in Rust, which Google says ran 1.8x faster.
• Security review: While auditing a set of access-control changes, Argon reportedly found four critical bugs that two earlier frontier models had missed on the same code.

These figures come from Google itself and describe internal use, not independent testing.

The separate weekly Argon quota

9to5Google reports that Google, in a post on X, said Pro subscribers get a dedicated Argon allowance that resets weekly. It sits on top of the existing quota for Gemini 3.8 Flash, so heavy Argon use should not drain the Flash allowance. The Antigravity blog post itself does not describe the quota, so check the pricing page in Antigravity for the current limits on your plan.

Who is affected and what to do

• Google AI Pro and Ultra subscribers: You should see Argon in the Antigravity app and CLI as the rollout reaches your account. Because the Argon quota is weekly, it may make sense to save it for complex tasks and keep using Flash for routine edits.
• Free users: Google's announcement only names paid Pro and Ultra plans, so Argon in Antigravity is not part of the free tier.
• Teams and companies: The options are the Gemini API or Antigravity under an eligible Gemini Enterprise subscription. Your admin will need to confirm eligibility.

How to get started

Google's instructions are short: install the newest release of Antigravity, either the desktop app or the CLI, then select Argon for your harder workflows. If you do not have Antigravity yet, it can be downloaded from the official Antigravity site. Since the rollout is gradual, the model may not appear on every account on day one.

What Hacker News users are saying

The Hacker News discussion around Argon centered on a separate project that pits the model against StarCraft bots, not on the Antigravity release. Commenters liked that the benchmark imposes time limits, which many benchmarks do not. Others asked whether the models might just be drawing on pre-training data, why win rates drop sharply against strong bots, and how top human players would do against the models. A few suggested comparing it with established neural-network bots or building a StarCraft II version.

Frequently asked questions

Which plans get Gemini 4 Argon in Antigravity?

Paid Google AI Pro and Google AI Ultra subscribers get it in the Antigravity desktop app and CLI. Businesses can use it through the Gemini API or eligible Gemini Enterprise subscriptions.

Does Argon use up my Gemini 3.8 Flash quota?

According to 9to5Google's report of Google's post on X, Pro users get a separate weekly Argon quota on top of the existing Flash allowance, so the two are counted separately.

Why don't I see Argon in Antigravity yet?

The rollout is gradual. Google recommends updating to the latest Antigravity version, and the model should show up once the rollout reaches your account.

What is Argon best suited for?

Google says it targets complex work such as large-scale software engineering, legal and finance tasks, and security analysis, and describes it as built for the hardest problems rather than everyday edits.