In this episode of The Data Business Podcast, Lucas and Luna explore the quiet shift from giant foundation models to small language models purpose-built for internal data work. They use the example of a mid-sized logistics company that replaced a massive API-based model with a 7-billion-parameter local model for warehouse incident reports, cutting inference cost per request by 92 percent while keeping accuracy steady at 94 percent. They discuss why SLMs are easier to fine-tune on proprietary data, how they fit into data pipelines for classification and extraction, and why data teams should think about model size as an infrastructure decision rather than an AI fashion statement. Lucas brings a concrete cost breakdown: serving a 7-billion-parameter model on a single GPU costs about 15 cents per hour versus several dollars per 1,000 requests for a large commercial API. Luna challenges the premise, asking whether smaller models can really handle complex reasoning. They also touch on the role of open-source weights, quantization, and the practical limits of what an S-L-M can do. If you are running a data team and wondering whether bigger is always better, this episode gives you a clear framework for choosing the right tool.