
Teach Your LLM to Talk: Synthetic Call Data Beats Jumbo Prompts for Phone Agents
TL;DR: If you care about tone, latency, and cost, don’t keep stuffing GPT-4o with giant prompts. Fine-tune a small model on synthetic call-style Q&A once, then ship it. A 1B Llama hit ~97% “conversational” answers vs. GPT-4o’s ~29% with prompting alone. The paper https://arxiv.