Image: Google

Google's coding app Antigravity is being prepared for Gemini 4 Argon, according to TestingCatalog. The site spotted new labels in the app around usage limits, subscriptions and prompts to upgrade to Google AI Ultra. It also found a voice agent prototype called Concierge, an Auto mode and custom skins in development.

Google hasn't announced any of this for Antigravity. What TestingCatalog found are interface labels and prototypes, which show what Google is working on, not when or whether it will ship.

GOOGLE 🔥: Besides preparation for Gemini 4 release on Antigravity, Google is also prototyping its own voice agent, internally called "Concierge".

Yet, it looks like a very early version, and it is hard to say if it will ever see the light of day in its current form. pic.twitter.com/wNNl42YvdE

— 🚨 AI News | TestingCatalog (@testingcatalog) October 7, 2026

The Argon clues are the most concrete. TestingCatalog reports that links inside Antigravity already carry the tracking tag "argon_model_selector," which suggests Argon will show up in the app's model picker. The new upgrade prompts point to Ultra subscribers getting it first.

That matches what Google has said. When it announced Gemini 4 Argon last week, Google said the model is going first to trusted cyber defenders and testers, with the wider release "starting with paid API customers and Google AI Ultra subscribers." Google also says Argon scores 77.9% on DeepSWE v1.1, a test of long software engineering tasks, and that thousands of Googlers already use it for coding work. We covered the Argon launch when it was announced.

For now, Argon isn't in Antigravity. The app's models page still lists Gemini 3.8 Flash and Gemini 3.1 Pro as its newest Gemini options, next to Claude Sonnet 5.5, Claude Opus 5.5 and GPT-OSS-120b. The pricing page already pitches Ultra as the plan with "higher access to our latest Gemini models," so Ultra-first access would fit how Google sells the app today.

Cost is the open question. Argon's introductory API price is $2 per million input tokens and $10 per million output tokens, rising to $4 and $20 once the introductory period ends. Antigravity plans don't bill per token. They use weekly and five-hour rate limits, and Google hasn't said how quickly Argon would use those up.

Concierge is the furthest from shipping. TestingCatalog describes it as an early agent prototype with real-time voice support, and its own post says it's hard to say whether it will ever ship in its current form. If it does, developers could give the agent spoken instructions instead of typing them.

Auto mode is more interesting than the name suggests, because Antigravity already has a detailed permission system. Its permissions docs describe three presets. Default runs terminal commands in a sandbox and asks before going outside it. Request Review asks before every command. Turbo turns the sandbox off and allows any command and full file access without asking.

TestingCatalog says Auto mode could mean fewer permission prompts, but its exact rules aren't clear, so it shouldn't be read as a no-limits mode. That leaves room for something between Default and Turbo, though Google hasn't shown how it would decide what to approve. It's another sign of Google giving its agents more room, after the Gemini app on Mac was spotted getting a full-access mode.

The skins would add visual customization. TestingCatalog says it's unclear whether that grows into a broader customization menu.

Google hasn't given a date for Argon in Antigravity or for any of these features. Its own rollout plan puts Ultra subscribers near the front of the line, but for now the app is only getting ready.