Google AI Studio Build tests unreleased Ultra mode
TestingCatalog spotted an unreleased Ultra option in Google AI Studio Build's mode dropdown, alongside Plan, Build and the previously discovered Security mode; its description says it uses “advanced skills and tools,” but specific capabilities remain unclear. In the outlet's early tests, generations through this flow were quite comprehensive even while using Gemini 3.8 Flash, and it inferred that Ultra devotes more thinking effort to app generation than the standard flow. Whether the mode is connected to Google's announced Gemini 4 Argon or requires an Ultra subscription remains unconfirmed.
TestingCatalog suggests the mode could help developers tackle more complex builds, though its connection to Gemini 4 Argon and subscription terms are unconfirmed.
Google is working on a new Ultra mode for Google AI Studio Build. We spotted the unreleased option in a mode dropdown alongside Plan, Build, and the previously discovered Security mode, which checks apps for vulnerabilities. Ultra’s description says it uses “advanced skills and tools,” but the specific capabilities remain unclear.
In our early tests, generations produced through this flow were quite comprehensive despite using Gemini 3.8 Flash. Based on those results, Ultra appears to devote more thinking effort to app generation than the standard flow. This could help developers tackle more complex builds, although the tests don't show how the mode allocates reasoning or which additional tools it uses.
The feature could fit Google’s broader push toward longer coding workflows. Google has announced Gemini 4 Argon and says it will begin wider access for paid API customers and Google AI Ultra subscribers after an initial testing phase. The announcement provides no firm release date.
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