---
title: Gemini
description: Google Gemini model configuration (Text Chat + Image Understanding + Image Generation)
---

Google Gemini supports text chat, image understanding, and image generation (Nano Banana series). A single `gemini_api_key` enables all capabilities.

<Tip>
  All capabilities below can be configured in one place via the "Model Management" page in the Web Console, with no need to manually edit the configuration file.
</Tip>

## Text Chat

```json
{
  "model": "gemini-3.5-flash",
  "gemini_api_key": "YOUR_API_KEY"
}
```

| Parameter | Description |
| --- | --- |
| `model` | Recommended: `gemini-3.5-flash`; also supports `gemini-3.1-pro-preview`, `gemini-3.1-flash-lite-preview`, `gemini-3-flash-preview`, `gemini-3-pro-preview`, etc. See [official docs](https://ai.google.dev/gemini-api/docs/models) |
| `gemini_api_key` | Create one in [Google AI Studio](https://aistudio.google.com/app/apikey) |
| `gemini_api_base` | Optional, defaults to `https://generativelanguage.googleapis.com`. Can be changed to a third-party proxy |

## Image Understanding

All Gemini models natively support vision. Once `gemini_api_key` is configured, the Agent's Vision tool automatically uses the main model to recognize images, with no extra setup required.

To manually specify a Vision model:

```json
{
  "tools": {
    "vision": {
      "model": "gemini-3.1-flash-lite-preview"
    }
  }
}
```

## Image Generation

```json
{
  "skills": {
    "image-generation": {
      "model": "gemini-3.1-flash-image-preview"
    }
  }
}
```

| Model ID | Alias |
| --- | --- |
| `gemini-3.1-flash-image-preview` | Nano Banana 2 |
| `gemini-3-pro-image-preview` | Nano Banana Pro |
| `gemini-2.5-flash-image` | Nano Banana |