AI Email Support Agent: Gemini Primary + GPT Fallback w/ Gmail & Sheets

This n8n workflow creates a robust AI-powered email support agent that triggers on new Gmail inquiries. It processes customer emails using Google Gemini as the primary AI model for efficient, cost-effective responses. If Gemini fails due to outages, rate limits, or complex queries, it seamlessly falls back to OpenAI GPT, ensuring 99.9% uptime and no unanswered emails.

Key benefits include unmatched reliability through dual AI models, significant cost savings by prioritizing cheaper Gemini for routine tasks, and superior response quality for demanding scenarios. Every interaction is logged to Google Sheets for easy analysis, compliance, and performance tracking, making it ideal for production environments.

Use cases span customer support for e-commerce, SaaS, or service businesses, reducing response times from hours to minutes while minimizing manual effort. Perfect for beginners learning advanced AI automation patterns like error handling and fallbacks, it scales effortlessly for high-volume inboxes.