Google opened Gemini 4 Argon to AI Pro and AI Ultra subscribers on October 13 and put its Antigravity coding agent inside the Gemini app for Mac. What each plan gets, what the API costs, and what is still unclear.
Google’s newest model is now in the Gemini app for paying subscribers. Gemini 4 Argon reached Google AI Pro and AI Ultra plans on October 13, according to Google’s blog. At its September 30 launch it was limited to a group of security partners.
The same update puts Antigravity, Google’s agent-based coding tool, inside the Gemini app for macOS. A button in the top-right corner of the window moves between chat and coding. Until now Antigravity was a separate app.
Who gets what
Monthly US prices, as reported by Engadget and 9to5Google. Google’s plan page lists the usage multiples:
| Plan | Price | Gemini 4 Argon in the app | Argon in Antigravity |
|---|---|---|---|
| AI Pro | $19.99 | Yes | Not confirmed |
| AI Ultra | $99.99 | Yes, with 5x the Pro limits | Yes |
| AI Ultra, top tier | $199.99 | Yes, with 20x the Pro limits | Yes, highest limits |
Google’s developer post says AI Ultra subscribers can try Argon in Antigravity and in AI Studio. 9to5Google reports the Antigravity view in the Mac app also requires Ultra. Google’s announcement for the Gemini app does not say which plans get the coding switch.
Developers can use Argon on the paid tier of the Gemini API. Google lists an introductory price of $2 per million input tokens and $10 per million output tokens, rising to $4 and $20 later. 9to5Google reports the introductory price runs through November 30. Cached input costs 95% less.
What else changed in the app
9to5Google lists the rest of the Mac update. A Chat and Task switch sits under the prompt box, and Task is the new name for Gemini Spark, which runs jobs while you are away from the computer. Connected Apps is now called Connectors. Typing @ opens Skills.
Google says Argon answers more directly, hedges less and posts more progress updates on long tasks. Its launch post claims 77.9% on the DeepSWE coding benchmark and first place on Zapier’s AutomationBench at 51.3%. Those are Google’s numbers. Independent tests are not out yet.
What isn’t answered yet
Google’s posts name no countries or languages for the app rollout. They don’t list Mac system requirements. They don’t say whether Argon reaches Google Workspace business accounts on the same schedule. BusinessToday reported on October 14 that enterprise users are included, without naming plans.
What it means if you pay for AI seats
The model and the coding agent now sit at two price points. At $19.99, Pro gets Argon for writing, research and analysis. The agent that edits code on a Mac costs $99.99 per person, five times more.
That makes the upgrade a per-person decision. Most of a team needs chat. A few engineers need the agent. Check what those engineers already pay for. Cursor tied its included usage to Grok this week and bills other labs’ models on top (our report). Paying for two coding agents per developer is the easy mistake to make this quarter.
These are consumer plans tied to personal Google accounts. If your company runs on Google Workspace, find out whether Argon reaches your Workspace Gemini license before anyone expenses a personal plan. Personal subscriptions sit outside your admin controls, data retention settings and vendor review.
If you build on the API, the introductory price halves the bill for now. Run your evaluations before December, then plan the budget at $4 and $20 per million tokens.