Multimodal Chat Assistant with GPT-4o for Text, Images, and PDFs
VerifiedBuild a multimodal AI chat assistant using GPT-4o for text, images, and PDFs.
What this workflow does
This workflow creates a smart AI chat assistant that processes text, images, and PDFs with GPT-4o's multimodal capabilities and conversation memory.
It suits AI-driven support bots, personal assistants, and embedded chat widgets needing file analysis and contextual replies.
Who is this for?
Support teams, developers, and product teams building chat interfaces that need to process mixed media queries from users.
What problem it solves
Manually handling images and PDFs in chats breaks context and requires separate tools, slowing down responses and analysis.
Live workflow preview
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What it automates
PDF Explainer Bot
Users upload contracts or reports and receive instant answers to questions about specific sections.
Image Analysis Assistant
Support agents receive photos from customers and get AI descriptions plus contextual replies in one thread.
Internal Knowledge Chat
Teams query mixed documents like screenshots and PDFs while keeping conversation history for follow-ups.
How the workflow works
The 6 nodes in this automation, in order.
- 1AI Agent@n8n/n8n-nodes-langchain.agent
- 2Basic LLM Chain@n8n/n8n-nodes-langchain.chainLlm
- 3OpenAI Chat Model@n8n/n8n-nodes-langchain.lmChatOpenAi
- 4Simple Memory@n8n/n8n-nodes-langchain.memoryBufferWindow
- 5Chat Memory Manager@n8n/n8n-nodes-langchain.memoryManager
- 6OpenAI@n8n/n8n-nodes-langchain.openAi
Apps & integrations used
How to set up Multimodal Chat Assistant with GPT-4o for Text, Images, and PDFs
- 1Import the workflow JSON into your n8n instance
- 2Add your OpenAI API key to the Chat Model node and select GPT-4o
- 3Enable file uploads in the chatTrigger node settings
- 4Connect the memory nodes (Simple Memory and Chat Memory Manager)
- 5Activate the workflow and open the chat UI to test text/image/PDF inputs
- 6Embed the chat widget on your site or connect via webhook
How to customize this workflow
- →Swap GPT-4o for GPT-4o mini to reduce token costs
- →Replace chatTrigger with a webhook node for API-first use
- →Add a Notion or Airtable node to log responses automatically
- →Insert a Slack node to notify a channel on new file uploads
Multimodal Chat Assistant with GPT-4o for Text, Images, and PDFs: pros & cons
Pros
- +Native GPT-4o vision support for images and PDFs
- +Conversation memory preserves context across messages
- +Modular nodes make it easy to embed or extend
- +Works directly in n8n's hosted chat UI
Cons
- –Requires paid OpenAI GPT-4o API access
- –PDF handling relies on model vision rather than text extraction
- –Base64 conversion step adds minor processing overhead
Frequently asked questions
It builds a chat assistant that accepts text, images, and PDFs and answers using GPT-4o with memory.
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