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Demo - Speed up your AI development with LangChain.js

Prerequisites

Before running the demo, make sure you have the packages installed by running the following command at the root of the repository:

npm install

Open a terminal to download these models with Ollama:

ollama pull phi3
ollama pull all-minilm:l6-v2

Scenario

Preparation

  1. Open the ollama website: https://ollama.com in a full screen browser
  2. Open the files ollama.http and openai.js in VS Code
  3. Open the terminal in VS Code and expand it to full screen

Demo

  1. Show the Ollama website, how to download and install Ollama.
  2. Show the list of models available with Ollama, scroll down to Phi-3 and show that there are multiple versions of the model available.
  3. Switch to VS Code terminal.
  4. Explain that you can use Ollama to download models and use them locally using this command: ollama pull phi3
  5. Show the list of models installed locally using this command: ollama list
  6. Explain that you can use Ollama with a web UI to interact with the models.
  7. Run this command to start Open WebUI, a local ChatGPT clone: docker run -p 3000:8080 --add-host=host.docker.internal:host-gateway --rm ghcr.io/open-webui/open-webui:main
  • Open the browser and go to http://localhost:3000
  • Create an account
  • Select phi3 model in the list at the top
  • Use one of the examples prompt to test the model
  1. Switch back to VS Code and show ollama.http file to explore the API.
  • Explain and run each request to show the Ollama API
  1. Open openai.js to show that you can directly use Ollama with the OpenAI SDK.
  • Run the code to show the response.