Classify & Auto-Sort Invoices in Google Drive with GPT-4o

This n8n workflow intelligently automates invoice management by scanning a Google Drive folder for PDF invoices, downloading them, and extracting text content. It leverages GPT-4o via LangChain to classify each invoice into Retail, Manufacturing, or EdTech categories based on parsed content, enabling precise document organization without manual intervention.

Key benefits include zero-touch processing for high-volume billing, reduced errors in sorting, and seamless integration with existing Google Drive setups. Finance teams and operations managers save hours weekly on document triage, turning chaotic incoming folders into structured, industry-specific archives.

Ideal for multi-client agencies, finance departments handling diverse invoices, or businesses scaling document workflows. Requires Google Drive OAuth, Azure OpenAI for GPT-4o, and LangChain setup. The batch processing ensures scalability, handling dozens of files efficiently with smart switch logic for routing.

Use cases: Streamline AP/AR processes in agencies serving multiple industries, automate compliance sorting, or integrate into larger ERP pipelines for instant categorization.