Multimodal Chat Assistant with GPT-4o for Text, Images & PDFs

This n8n workflow creates a smart multimodal chat assistant powered by OpenAI's GPT-4o model, capable of processing text inputs, analyzing uploaded images via vision capabilities, and handling PDFs. It uses n8n's chat trigger for a hosted UI where users can send messages or files. The workflow detects file uploads, converts images to base64 for GPT-4o analysis, generates natural language descriptions, and responds contextually. A memory buffer maintains conversation history, enabling intelligent follow-ups.

Key features include seamless multimodal input handling, modular design for easy integration with webhooks or forms, and extensibility for actions like saving to databases or notifying via Slack/Email. It requires only an OpenAI GPT-4o API key and chat file upload enabled, making setup quick.

Benefits: Saves development time on custom AI chatbots, supports rich media for better user experience, and scales for production use. Ideal use cases: PDF explainer bots, internal knowledge bases with media, personal assistants, customer support with image troubleshooting, or embedded website widgets.