Nano Banana/Gemini 2.5 Telegram bot with multi-modal functionality

How it works

• Multi-modal AI Image Generator powered by Google's Nano Banana (Gemini 2.5 Flash Image) - the latest state-of-the-art image generation model
• Accepts text, images, voice messages, and PDFs via Telegram for maximum flexibility
• Uses OpenAI GPT models for conversation and image analysis, then Nano Banana for stunning image generation
• Features conversation memory for iterative image modifications ("make it darker", "change to blue")
• Processes different input types: analyzes uploaded images, transcribes voice messages, extracts PDF text
• All inputs are converted to optimized prompts specifically tuned for Nano Banana's capabilities

Set up steps

• Create Telegram bot via @BotFather and get API token
• Set up Google Gemini API key from Google AI Studio for Nano Banana image generation (~$0.04/image)
• Configure OpenAI API key for GPT models (conversation, image analysis, voice transcription)
• Import workflow and configure all three API credentials in n8n
• Update bot tokens in HTTP request nodes for file downloads
• Test with text prompts, image uploads, voice messages, and PDF documents