AI WhatsApp Chatbot: Text, Voice, Images, PDFs + Memory

This advanced n8n workflow powers a WhatsApp chatbot capable of handling diverse message types: text, voice notes, images, and PDFs. It automatically detects input types and routes them to specialized OpenAI models—GPT-4o-mini for text, vision models for images, Whisper for voice transcription, and text extraction for PDFs—ensuring accurate analysis and relevant responses. Conversation memory maintains context over 10 interactions per user via session IDs, enabling coherent, personalized dialogues.

Key benefits include seamless multimodal support, reducing manual intervention in customer service or personal assistance, and mobile-optimized replies for better UX. It's ideal for businesses needing 24/7 AI support, educators for interactive learning, or individuals automating personal tasks like document summarization.

Use cases span e-commerce query handling, educational Q&A with file uploads, visual content description for accessibility, and voice-based interactions for hands-free use. The workflow saves hours of development time, integrating WhatsApp webhooks with robust AI logic for production-ready deployment.