ComfyUI Extension: ComfyUI-Google-AI-Studio

Authored by BuffMcBigHuge

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Google AI Studio by BuffMcBigHuge

Custom Nodes (0)

    README

    ComfyUI Google AI Studio Nodes

    This custom node package provides integration with Google AI Studio's latest APIs for ComfyUI, including Text-to-Speech (TTS), Text Generation, and Image Generation using the google-genai Google Gen AI SDK (Google AI Studio).

    ComfyUI Google AI Studio Nodes

    Features

    • Text Generation: Generate creative text, stories, essays using Gemini models
    • Image Generation: Create stunning images using Google's Gemini (free) and Imagen (paid) models
    • Image Editing: Edit existing images using Gemini 2.5 Flash with multimodal input support
    • Batch Processing: Process multiple images simultaneously in a single API call
    • Google AI Studio TTS: Convert text to speech using Google's Gemini TTS models
    • Multi-Speaker TTS: Generate conversations with multiple distinct voices
    • 30+ Voice Options: Choose from a wide variety of high-quality voices with style descriptions

    Installation

    1. Clone this repository into your ComfyUI custom_nodes directory:

      cd ComfyUI/custom_nodes
git clone https://github.com/BuffMcBigHuge/ComfyUI-Google-AI-Studio.git

    2. Install the required dependencies:

      cd ComfyUI-Google-AI-Studio
pip install -r requirements.txt

    3. Get your Google AI Studio API key:

    4. Restart ComfyUI

    Nodes

    Google AI Studio Text Generator

    Generates text using Google's Gemini models for creative writing, essays, code, and more.

    Inputs:

    • prompt: The text prompt to generate from (multiline supported)
    • api_key: Your Google AI Studio API key
    • model: Choose from Gemini models (gemini-2.0-flash-001, gemini-1.5-pro, etc.)
    • system_instruction (optional): Guide the model's behavior and tone
    • temperature (optional): Controls creativity (0.0-2.0, default 0.7)
    • max_output_tokens (optional): Maximum tokens to generate (1-8192, default 1024)

    Output:

    • text: Generated text content

    Google AI Studio Image Generator

    Creates images using Google's Gemini and Imagen models from text descriptions.

    Available Models:

    • gemini-2.0-flash-preview-image-generation - Free tier (default, basic controls)
    • gemini-2.5-flash-image-preview - Free tier (newest Gemini model, basic controls)
    • imagen-3.0-generate-002 - Paid tier (high quality, advanced controls)
    • imagen-3.0-fast-generate-001 - Paid tier (faster generation, advanced controls)

    Inputs:

    • prompt: Description of the image to generate or edit
    • api_key: Your Google AI Studio API key
    • model: Choose from available models above
    • input_image (optional): Input image(s) for editing/modification - supports batch processing (⚠️ Gemini models only)
    • negative_prompt (optional): What you don't want in the image (works with all models)
    • aspect_ratio (optional): Image proportions (⚠️ Imagen only - ignored for Gemini)
    • safety_filter_level (optional): Content filtering (⚠️ Imagen only - ignored for Gemini)
    • person_generation (optional): People generation controls (⚠️ Imagen only - ignored for Gemini)

    Google AI Studio TTS

    Converts text to speech using Google's Gemini TTS models.

    Inputs:

    • text: The text to convert to speech (multiline supported)
    • api_key: Your Google AI Studio API key
    • model: Choose between gemini-2.5-flash-preview-tts or gemini-2.5-pro-preview-tts
    • voice: Select from 30+ available voices (Kore, Puck, Zephyr, etc.)
    • instruction_prefix (optional): Add style instructions like "Say cheerfully:" or "Read slowly:"

    Output:

    • audio: Audio data compatible with ComfyUI audio nodes

    Google AI Studio Multi-Speaker TTS

    Generates conversations with multiple distinct voices.

    Inputs:

    • transcript: Multi-line text with speaker names (format: "Speaker Name: dialogue")
    • api_key: Your Google AI Studio API key
    • model: TTS model selection
    • speaker1_name / speaker1_voice: First speaker configuration
    • speaker2_name / speaker2_voice: Second speaker configuration
    • speaker3_name / speaker3_voice (optional): Third speaker
    • speaker4_name / speaker4_voice (optional): Fourth speaker

    Output:

    • audio: Multi-speaker audio data

    Model Capabilities:

    | Feature | Gemini Models (Free) | Imagen Models (Paid) | |---------|---------------------|---------------------| | Text-to-image | ✅ | ✅ | | Image-to-image editing | ✅ | ❌ | | Negative prompts | ✅ (in main prompt) | ✅ (separate parameter) | | Aspect ratio control | ❌ | ✅ | | Safety filter levels | ❌ (built-in safety) | ✅ | | Person generation control | ❌ | ✅ |

    Output:

    • image: Generated image compatible with ComfyUI image nodes

    Available Voices

    The following 30 voices are available, each with distinct characteristics:

    | Voice | Style | Voice | Style | Voice | Style | |-------|--------|-------|--------|-------|--------| | Zephyr | Bright | Puck | Upbeat | Charon | Informative | | Kore | Firm | Fenrir | Excitable | Leda | Youthful | | Orus | Firm | Aoede | Breezy | Callirrhoe | Easy-going | | Autonoe | Bright | Enceladus | Breathy | Iapetus | Clear | | Umbriel | Easy-going | Algieba | Smooth | Despina | Smooth | | Erinome | Clear | Algenib | Gravelly | Rasalgethi | Informative | | Laomedeia | Upbeat | Achernar | Soft | Alnilam | Firm | | Schedar | Even | Gacrux | Mature | Pulcherrima | Forward | | Achird | Friendly | Zubenelgenubi | Casual | Vindemiatrix | Gentle | | Sadachbia | Lively | Sadaltager | Knowledgeable | Sulafat | Warm |

    Supported Languages

    The TTS models automatically detect input language and support 24 languages including:

    • English (US, India)
    • Spanish (US)
    • French (France)
    • German (Germany)
    • Italian (Italy)
    • Portuguese (Brazil)
    • Japanese (Japan)
    • Korean (Korea)
    • Chinese (Simplified, Traditional)
    • Hindi (India)
    • Arabic (Egyptian)
    • Russian (Russia)
    • And more...

    Usage Examples

    Text Generation Example

    1. Add a "Google AI Studio Text Generator" node
    2. Enter your prompt: "Write a creative short story about a robot learning to paint"
    3. Enter your API key
    4. Select model: gemini-2.0-flash-001
    5. Adjust temperature for creativity (0.7 for balanced, 1.5 for very creative)
    6. Connect output to text display or save node

    Image Generation Example

    1. Add a "Google AI Studio Image Generator" node
    2. Enter your prompt: "A serene Japanese garden with cherry blossoms and a small pond"
    3. Enter your API key
    4. Select model: gemini-2.0-flash-preview-image-generation (free tier, default)
    5. For advanced controls (paid tier), switch to imagen-3.0-generate-002 and adjust aspect ratio, safety settings
    6. Connect output to image preview or save node

    Image Editing Example

    1. Add a "Google AI Studio Image Generator" node
    2. Connect an input image to the input_image parameter
    3. Enter your editing prompt: "Add a rainbow in the sky and make it look more vibrant"
    4. Enter your API key
    5. Select a Gemini model (2.0 or 2.5 Flash - image editing only works with Gemini models)
    6. Connect output to image preview or save node

    Batch Image Processing Example

    1. Add a "Google AI Studio Image Generator" node
    2. Connect a batch of images to the input_image parameter (e.g., from an image batch loader)
    3. Enter your editing prompt: "Apply vintage film effect to these images"
    4. Enter your API key
    5. Select a Gemini model - all images in the batch will be sent in a single API call
    6. Connect output to image preview or save node

    Basic TTS Example

    1. Add a "Google AI Studio TTS" node
    2. Enter your text: "Welcome to my podcast! Today we're discussing AI."
    3. Enter your API key
    4. Select voice: Kore
    5. Connect output to audio preview or save node

    Multi-Speaker Conversation Example

    1. Add a "Google AI Studio Multi-Speaker TTS" node
    2. Enter transcript: 
      Host: Welcome to Tech Talk!
Guest: Thanks for having me on the show.
Host: Let's dive into today's topic.
    3. Configure speakers:
      • Speaker 1: Host with voice Kore
      • Speaker 2: Guest with voice Puck
    4. Connect output to audio nodes

    Style Control Example

    Use the instruction_prefix to control speech style:

    • "Say cheerfully:" - Upbeat delivery
    • "Read slowly and clearly:" - Careful pronunciation
    • "Speak in a whisper:" - Quiet, intimate tone
    • "Say with excitement:" - Energetic delivery

    Technical Details

    • Audio Format: 24kHz, 16-bit PCM, mono/stereo
    • Context Window: 32k tokens maximum
    • Output Format: ComfyUI-compatible audio tensors
    • API Rate Limits: Subject to Google AI Studio quotas

    Troubleshooting

    Common Issues

    1. "Google AI SDK not installed"

      • Run: pip install google-genai

    2. "API key is required"

    3. "TTS generation failed"

      • Check your internet connection
      • Verify API key is valid and has quota remaining
      • Ensure text is within the 32k token limit

    4. Audio playback issues

      • Ensure ComfyUI audio nodes are properly connected
      • Check that audio preview nodes support the format

    API Limits

    Support

    For issues specific to these nodes:

    • Check the Issues page
    • Review the troubleshooting section above

    For Google AI Studio API issues:

    License

    This project is licensed under the MIT License - see the LICENSE file for details.

    Changelog

    v1.1.0 - Image Editing & Batch Processing

    Image Editing Example New Feature: Image editing with Gemini 2.5 Flash - example shows transforming Darth Vader with the prompt "put the character on the beach"

    🆕 New Features

    • Image Editing Support: Added Gemini 2.5 Flash image editing capabilities

      • Edit existing images with text prompts using multimodal input
      • Supports single images or batch processing
      • Works with all ComfyUI image nodes and workflows

    • Gemini 2.5 Flash Image Model: Added gemini-2.5-flash-image-preview

      • Latest Google image generation model
      • Free tier access with advanced capabilities
      • Enhanced image quality and prompt understanding

    🔄 Improvements

    • Enhanced Image Generator node with optional input_image parameter
    • Updated API integration with proper multimodal Content/Part structure
    • Improved batch processing efficiency for multiple images
    • Better error handling for image conversion and processing

    Note: This is an unofficial community-created integration. Google AI Studio is a product of Google LLC.