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GEMINI IMAGE GENERATION NODE - INSTALLATION GUIDE
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This custom node allows you to generate images using Google's Gemini API
directly within ComfyUI, supporting resolutions up to 4K.

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QUICK START - COPY & PASTE THESE COMMANDS
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1. Navigate to your ComfyUI directory in terminal/command prompt

2. For Windows (PowerShell or CMD):
   
   cd C:\Users\[YourUsername]\Documents\ComfyUI
   .venv\Scripts\activate
   pip install --upgrade google-genai
   
3. For Linux/Mac:
   
   cd ~/ComfyUI
   source venv/bin/activate
   pip install --upgrade google-genai

4. Verify installation (optional):
   
   pip show google-genai

5. Set API key as environment variable (recommended):
   
   Windows (PowerShell):
   $env:GOOGLE_API_KEY="YOUR_API_KEY_HERE"
   
   Windows (CMD):
   set GOOGLE_API_KEY=YOUR_API_KEY_HERE
   
   Linux/Mac:
   export GOOGLE_API_KEY="YOUR_API_KEY_HERE"

6. Restart ComfyUI

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REQUIREMENTS
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- ComfyUI installed and working
- Python 3.8 or higher
- Google AI Studio API key (free tier available)
- Internet connection

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INSTALLATION STEPS
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1. INSTALL THE NODE
   
   Copy the "Google Gemini API" folder to your ComfyUI custom nodes directory:
   
   Windows: 
   C:\Users\[YourUsername]\Documents\ComfyUI\custom_nodes\
   
   Linux/Mac:
   ~/ComfyUI/custom_nodes/

2. INSTALL PYTHON DEPENDENCIES
   
   Open a terminal/command prompt and navigate to your ComfyUI directory, then run:
   
   Windows (PowerShell):
   .\venv\Scripts\activate
   pip install --upgrade google-genai
   
   Linux/Mac:
   source venv/bin/activate
   pip install --upgrade google-genai
   
   IMPORTANT: You need google-genai version 1.51.0 or higher for 4K support.
   
   To verify the version:
   pip show google-genai

3. GET YOUR GOOGLE API KEY
   
   a) Go to: https://aistudio.google.com/app/apikey
   b) Sign in with your Google account
   c) Click "Create API Key"
   d) Copy the generated key (starts with "AIza...")
   
   BILLING NOTE: Image generation requires billing to be enabled.
   - Free tier has ZERO quota for image generation
   - You MUST enable billing at: https://console.cloud.google.com/billing
   - Set up budget alerts to avoid unexpected charges

4. CONFIGURE THE NODE
   
   Option A: In ComfyUI Node
   - Paste your API key directly into the "api_key" field
   
   Option B: Environment Variable (Recommended for security)
   - Set GOOGLE_API_KEY environment variable
   - The node will automatically use it if the field says "INSERT_API_KEY_HERE"
   
   Windows (PowerShell):
   $env:GOOGLE_API_KEY="YOUR_API_KEY_HERE"
   
   Linux/Mac:
   export GOOGLE_API_KEY="YOUR_API_KEY_HERE"

5. RESTART COMFYUI
   
   After installing dependencies, restart ComfyUI completely.

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NODE FEATURES
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- Models: 
  * gemini-3-pro-image-preview (recommended, supports 4K)
  * gemini-2.5-flash-image

- Resolutions:
  * 1K: ~1024 pixels
  * 2K: ~2048 pixels  
  * 4K: ~4096 pixels (e.g., 5504x3072 for 16:9)

- Aspect Ratios:
  * 1:1, 16:9, 4:3, 3:4, 9:16, 2:3, 3:2, 4:5, 5:4, 21:9

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BUDGET PROTECTION
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To avoid unexpected charges, set up a budget alert:

1. Go to: https://console.cloud.google.com/billing
2. Select your billing account
3. Click "Budgets & alerts" (left menu)
4. Click "Create Budget"
5. Set monthly limit (e.g., $5 or $10)
6. Enable email alerts at 50%, 90%, 100%

Image generation costs vary by resolution. 4K images cost more than 1K.

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TROUBLESHOOTING
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ERROR: "RESOURCE_EXHAUSTED" or "429" error
SOLUTION: Enable billing for your Google Cloud project. Free tier has
          zero quota for image generation.

ERROR: "GenerateContentResponse object has no attribute 'parts'"
SOLUTION: Outdated SDK. Run: pip install --upgrade google-genai

ERROR: "Image object has no attribute 'mode'"
SOLUTION: Update GeminiImageGen.py to latest version from this folder.

ERROR: "ImageConfig not found"
SOLUTION: Upgrade google-genai to 1.51.0+: pip install --upgrade google-genai

ERROR: Images always 1K regardless of setting
SOLUTION: Ensure google-genai is version 1.51.0 or higher.

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SUPPORT
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For issues with:
- This node: Check the GeminiImageGen.py file for updates
- Gemini API: https://ai.google.dev/gemini-api/docs/image-generation
- Billing: https://console.cloud.google.com/billing

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Last Updated: 2025-11-20
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