Quick overview
Quick overview This workflow downloads an audio file, transcribes it with OpenAI Whisper, classifies the transcript intent using OpenAI GPT-4o-mini, and returns a simple response message based on the detected category. How it works Runs when you manually execute the workflow. Sets a sample audio URL (JFK .flac) and downloads the audio file via an HTTP request. Sends the audio file to OpenAI Whisper to generate a text transcription. Passes the transcript to OpenAI GPT-4o-mini to classify it as GREETING, QUESTION, REQUEST, or OTHER. Normalizes the model output to an uppercase intent value and routes execution based on the intent. Returns a predefined response message for the matched intent branch. Setup Add OpenAI API credentials for both the Whisper transcription step and the GPT-4o-mini intent classification step. Replace the sample audio URL with your own audio source, or swap the manual trigger for a webhook that provides an audio URL. If you use a different audio format, ensure the downloaded file is a supported type for OpenAI transcription (and adjust the MIME type/value if you rely on it elsewhere). Customization Connect to any WhatsApp gateway — Evolution API, Twilio, or WhatsApp Cloud API Add custom intent categories to match your business (COMPLAINT, APPOINTMENT, PRICING) Route each intent to a different workflow — CRM update, human escalation, auto-reply Swap GPT-4o-mini for Claude Haiku to reduce costs on high-volume deployments Extend with RAG to give context-aware responses based on your knowledge base Additional info This workflow is a simplified extract from a production multi-tenant WhatsApp AI system handling real customer conversations. Built with: n8n · OpenAI Whisper · GPT-4o-mini · Evolution API · Docker · Oracle Cloud Tags: whatsapp, voice, audio, transcription, whisper, intent, classification, chatbot, ai-agent, automation, openai, gpt4o-mini, customer-support, nlp. An n8n automation workflow template by Luis R..
Luis R.
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