GPT4All REST API

This directory contains the source code to run and build docker images that run a FastAPI app for serving inference from GPT4All models. The API matches the OpenAI API spec.

Tutorial

The following tutorial assumes that you have checked out this repo and cd'd into it.

Starting the app

First change your working directory to gpt4all/gpt4all-api.

Now you can build the FastAPI docker image. You only have to do this on initial build or when you add new dependencies to the requirements.txt file:

DOCKER_BUILDKIT=1 docker build -t gpt4all_api --progress plain -f gpt4all_api/Dockerfile.buildkit .

Then, start the backend with:

docker compose up --build

This will run both the API and locally hosted GPU inference server. If you want to run the API without the GPU inference server, you can run:

docker compose up --build gpt4all_api

To run the API with the GPU inference server, you will need to include environment variables (like the MODEL_ID). Edit the .env file and run

docker compose --env-file .env up --build

Spinning up your app

Run docker compose up to spin up the backend. Monitor the logs for errors in-case you forgot to set an environment variable above.

Development

Run

docker compose up --build

and edit files in the api directory. The api will hot-reload on changes.

You can run the unit tests with

make test

Viewing API documentation

Once the FastAPI ap is started you can access its documentation and test the search endpoint by going to:

localhost:80/docs

This documentation should match the OpenAI OpenAPI spec located at https://github.com/openai/openai-openapi/blob/master/openapi.yaml

Running inference

import openai
openai.api_base = "http://localhost:4891/v1"

openai.api_key = "not needed for a local LLM"


def test_completion():
    model = "gpt4all-j-v1.3-groovy"
    prompt = "Who is Michael Jordan?"
    response = openai.Completion.create(
        model=model,
        prompt=prompt,
        max_tokens=50,
        temperature=0.28,
        top_p=0.95,
        n=1,
        echo=True,
        stream=False
    )
    assert len(response['choices'][0]['text']) > len(prompt)
    print(response)