RouteNator: A Router-Based Multi-Modal Architecture for Generating Synthetic Training Data for Function Calling LLMs

TL;DR

RouteNator introduces a router-based multi-modal architecture that leverages domain resources and language models to generate diverse, high-quality synthetic training data, significantly improving function calling performance in LLMs.

Contribution

The paper presents a novel router-based architecture utilizing domain resources and multi-modal models to generate synthetic data that better mimics real-world distributions for LLM fine-tuning.

Findings

Enhanced function classification accuracy

Improved API parameter selection

Outperforms traditional synthetic data methods

Abstract

This paper addresses fine-tuning Large Language Models (LLMs) for function calling tasks when real user interaction data is unavailable. In digital content creation tools, where users express their needs through natural language queries that must be mapped to API calls, the lack of real-world task-specific data and privacy constraints for training on it necessitate synthetic data generation. Existing approaches to synthetic data generation fall short in diversity and complexity, failing to replicate real-world data distributions and leading to suboptimal performance after LLM fine-tuning. We present a novel router-based architecture that leverages domain resources like content metadata and structured knowledge graphs, along with text-to-text and vision-to-text language models to generate high-quality synthetic training data. Our architecture's flexible routing mechanism enables synthetic data generation that matches observed real-world distributions, addressing a fundamental limitation of traditional approaches. Evaluation on a comprehensive set of real user queries demonstrates significant improvements in both function classification accuracy and API parameter selection. Models fine-tuned with our synthetic data consistently outperform traditional approaches, establishing new benchmarks for function calling tasks.