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Google’s Gemini models bring strong multimodal capability — handling text, images, and video in the same conversation. GenosOS uses Gemini 2.5 Pro as the default model and automatically escalates to Gemini 3 Pro for tasks that demand higher reasoning.

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Models

TierModelWhen it’s used
DefaultGemini 2.5 ProAll standard requests
BoostGemini 3 ProComplex tasks, important requests, explicit urgency
Model switching is automatic. When you express importance or urgency, the boost tool activates Gemini 3 Pro mid-conversation without interrupting the flow.

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Getting an API key

1

Go to Google AI Studio

Open aistudio.google.com and sign in with your Google account.
2

Get an API key

Click Get API key in the top navigation or left sidebar.
3

Create a new key

Click Create API key, select a Google Cloud project (or create one), and copy the generated key.
Key format: Google API keys start with AIza 
AIzaSy...

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OAuth option: Gemini CLI auth

In addition to API keys, GenosOS supports authenticating via Google’s device flow — the same method used by the Gemini CLI. This authenticates your Google account through a browser OAuth flow rather than a static key. To use this method, tell the assistant: 
"Use Gemini CLI auth"
"Authenticate Gemini with my Google account"
GenosOS will provide a device authorization URL. Open it in your browser, sign in, and the assistant will detect the completed auth automatically.
OAuth auth is tied to your Google account, not a project-scoped API key. This can be useful if you want to avoid managing API keys manually.

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Configuring GenosOS to use Gemini

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On first run

The first-run wizard asks which provider you want to use. Select Gemini and paste your AIza key when prompted — or choose the OAuth option to authenticate via browser. GenosOS validates and stores your credentials encrypted in the vault.

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Switching from another provider

Tell the assistant: 
"Use Gemini"
"Switch to Gemini"
"Switch to Google"
If GenosOS does not already have credentials on file for Gemini, it will ask for your API key or offer the OAuth option.

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Setting a specific key

"Set my Gemini API key to AIzaSy..."
Once stored, credentials are encrypted with AES-256-GCM in the GenosOS vault. You can switch providers and switch back without re-entering credentials.

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Multimodal support

Gemini natively handles mixed inputs in a single conversation. You can include images or reference video in your queries alongside text, and Gemini will reason over all of it together. This is built into the provider — no special configuration required. GenosOS passes multimodal inputs through to the Gemini API automatically when you include media in your messages.