Here is a 1-paragraph summary of the text: The article discusses how LeptonAI, an early LangSmith BETA user, successfully finetuned an open-source model for their specific use case, mimicking a Chief Financial Officer (CFO) through AI. The team started with OpenAI's ChatGPT 3.5 and found it worked well for simple questions but struggled with more complex ones. They then tried Vicuna, another open-source chatbot, which required significant work to make compatible with the original API endpoint. However, fine-tuning a model using data from earning call transcripts resulted in a significantly better performance, allowing the AI to "talk like" a seasoned CFO. The integration of data and LLM techniques has opened up new avenues for innovation and discovery, transforming the way we interact with technology.