Image Generation

Enable image generation capabilities for your AI Agents in Onyx

The image generation action allows your Agents to create images based on text prompts. Once configured, any AI model in Onyx can invoke this action to generate images using supported image generation models.

Supported Models

Model	Provider
GPT Image 1.5	OpenAI / Azure OpenAI
GPT Image 1	OpenAI / Azure OpenAI
DALL-E 3	OpenAI / Azure OpenAI
Nano Banana	Vertex (Google)
Nano Banana Pro	Vertex (Google)

Configuration

1. Navigate to Image Generation

   Go to the Admin Panel and select Image Generation under the Configuration section.

   
2. Connect a Model

   The page displays available models grouped by provider (OpenAI, Azure OpenAI and Vertex).

   Click Connect on any model to configure it. A modal will open where you can set up credentials:

   OpenAI

   • Use existing API key: Select from previously configured OpenAI API keys
   • Enter new API key: Add a new OpenAI API key

   Azure OpenAI

   • Use existing API key: Select from previously configured Azure OpenAI API keys
   • Enter new API key: Add a new Azure OpenAI API key

   Vertex (Google)

   • Service Account: Create a Google Cloud service account, then generate and download a JSON key file
   • Upload credentials: Upload the service account JSON key file
   • Region (Optional): Define the region you want requests sent to. Defaults to global

   The last configured model will automatically become the Current Default.

3. Manage Default Model

   The model marked as Current Default is used when users request image generation in chat.

   • To remove a model as default: Click the “Current Default” badge on that model
   • To edit credentials: Click the settings icon (gear) to open a modal where you can update the API key

Using Image Generation

Once image generation is configured with a default model, any AI model in Onyx can invoke the image generation action. When a user requests an image, the Agent will automatically use the configured default image generation model.