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Gpt J

Gpt J is a Python package documented as a client for sending prompts to a GPT-J service and generating text. Its README describes basic completions and a contextual interface that accepts dialogue examples, with adjustable output length and sampling parameters. The README also states that the API is currently down.

Explore the practical guide ↓

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Gpt J — OpenViST project profile in AI APIs & Platforms.
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Understand the project

Practical overview

When it fits

Use the repository to understand the package’s intended Python interface or review its prompt and parameter design. The README says the API is down, so it does not support relying on the service for current text generation.

Who it is for

  • Python developers exploring a GPT-J prompt-completion client.
  • Developers interested in configuring text-generation length, randomness and repetition.
  • People reviewing an example of contextual prompting with sample exchanges.

Documented uses

  • Submit a prompt for a text completion, such as continuing a code snippet.
  • Adjust output length and sampling parameters in a generation request.
  • Provide context, speaker labels and example exchanges for a conversational prompt.
Before you choose

Requirements & limits

The repository is public and declares an MIT license. The README says the GPT-J API is currently down.

  • The documented package is Python-based and installs with pip install gptj.
  • The README describes controls for length, temperature, top-p, top-k and repetition penalty.
  • Its advanced example builds context from a description and user-query/response pairs.
  • The README’s notice that the API is down is a key constraint on practical use.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Prepare a basic GPT-J completion call

Set up the documented Python package and assemble a basic text-completion call.

Before you start

  • Python 3, as described by the project
  • The package installation command shown in the README

Steps

  1. Install the package with the command below.

    Documented command
    pip install gptj

  2. Import simple_completion from gpt_j.Basic_api and set a prompt.

  3. Set completion options such as maximum length, temperature, top probability, top-k, and repetition penalty. The README recommends 204 tokens or less and notes values above 512 tend to take longer.

  4. Create the query with simple_completion(prompt, length=max_length, temp=temperature, top_p=top_probability, top_k=top_k, rep=repetition) and print the query.

Expected outcome

A basic completion call is assembled to request text from the GPT-J service and print its response.

Guide limitations

  • The README states that the API is officially down, so the documented service may not be usable.
  • The README says temperature and top probability should be floats and advises setting one to 1.0 when using the other.
  • The README warns that this is a small 6B-parameter model and may not always produce accurate results.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
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Sources checked
17 October 2026
Original website title
TheProtaganist/gpt-j · Official homepage title · retained in its source language
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