This workflow implements a cost-optimized AI routing system using n8n. It intelligently decides whether a request shoul…
This workflow implements a cost-optimized AI routing system using n8n. It intelligently decides whether a request should be handled by a low-cost model or escalated to a higher-quality model based on response confidence. The goal is to minimize LLM usage costs while maintaining high answer quality. A query is first processed by a cheaper model. The response is then evaluated by a confidence-scoring AI agent. If the response quality is insufficient, the workflow automatically escalates the request to a more capable model. This approach is useful for building scalable AI systems where most queries can be answered cheaply, while complex queries still receive high-quality responses. How It Works Webhook Trigger Receives a user query from an external application. Workflow Configuration Defines parameters such as: confidence threshold cheap model cost expensive model cost Cheap Model Response The query is first processed using GPT-4o-mini to minimize cost. Confidence Evaluation An AI agent analyzes the response quality. It evaluates accuracy, completeness, clarity, and relevance. Structured Output Parsing The evaluator returns structured data including: confidence score explanation escalation recommendation. Decision Logic If the confidence score is below the configured threshold, the workflow escalates the request. Expensive Model Escalation The query is reprocessed using GPT-4o for a higher-quality answer. Cost Calculation Token usage is analyzed to estimate: total cost cost difference between models. Final Response Formatting The workflow returns: AI response model used confidence score escalation status estimated cost. Setup Instructions Create an OpenAI credential in n8n. Configure the following nodes: Cheap Model (GPT-4o-mini) Expensive Model (GPT-4o) OpenAI Chat Model used by the confidence evaluator agent. Adjust configuration values in the Workflow Configuration node: confidenceThreshold cheapModelCostPer1kTokens expensiveModelCostPer1kTokens Deploy the workflow and send requests to the Webhook URL. Example webhook payload: { "query": "Explain how photosynthesis works." }. An n8n automation workflow template by ResilNext.
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