Unlock Ollama’s Modelfile: Upgrade Your Model’s Brain

In this video, Prompt Engineer explores the Modelfile of Ollama and demonstrates how to change the ‘brain’ of models in Ollama. The Modelfile is a blueprint used to create and share models with Ollama. It includes instructions such as FROM, PARAMETER, TEMPLATE, SYSTEM, ADAPTER, LICENSE, and MESSAGE.

The video begins with a brief overview of how to download and install Ollama on different operating systems. Once installed, the host navigates through the terminal to list available models and introduces the Modelfile. By using the command ‘Ollama show modelname model file’, the host displays the Modelfile of the Mistal model, which includes parameters, templates, and system prompts.

The host then creates a custom Modelfile by modifying the system prompt to make the assistant speak like Eminem, the famous rapper. The new Modelfile is saved and a new model is created using the ‘Ollama create’ command. The custom model is tested by asking questions, and the responses are generated in the style of Eminem, demonstrating the successful modification.

Additionally, the host shows how to specify message history in the Modelfile, allowing for predefined interactions. Another custom model is created with this message history and tested to ensure it remembers the predefined interactions.

The video concludes with a summary of the steps to create and modify a Modelfile, and a preview of the next video, which will cover how to upload custom models to the Ollama library for public use. The host encourages viewers to subscribe for more tutorials and tips on using Ollama effectively.