Extensions/comfyui-gemini-apikey
ComfyUI Extension

comfyui-gemini-apikey

This node allows you to use Google's Gemini Nano Banana 2 (Imagen 3 / 3.1 Flash) models for image generation directly within ComfyUI using an API Key.

By mortyhuang·Created 5 months ago·Updated 5 months ago· 0
mortyhuang/comfyui-gemini-apikey
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ComfyUI Gemini API Key Node

This node allows you to use Google's Gemini Nano Banana 2 (Imagen 3 / 3.1 Flash) models for image generation directly within ComfyUI using an API Key.

Features

  • Fully aligned with official Nano Banana 2 specifications.
  • Clean UI: API Key is loaded from ComfyUI/user/gemini_config.json.
  • Supports Multi-image input and official Gemini Input Files.
  • Supports "Thinking" mode and System Prompts.

Installation

  1. Move this folder comfyui-gemini-apikey into your ComfyUI custom_nodes directory.
  2. Create a file at ComfyUI/user/gemini_config.json with your key: 
    { "api_key": "YOUR_KEY_HERE" }
  3. Restart ComfyUI.

Parameters

  • prompt: Text prompt for generation.
  • model: Gemini 3.1 Flash Image (Nano Banana 2).
  • seed: Seed for deterministic output.
  • aspect_ratio: Support for 1:1, 16:9, 21:9, etc.
  • resolution: 1K, 2K, 4K.
  • response_modalities: IMAGE or IMAGE+TEXT.
  • thinking_level: MINIMAL or HIGH.