GPT-J Models by EleutherAI

EleutherAIApache 2.0Open source
This model family is considered obsolete. Consider newer alternatives in Related Model Families below.
1 modelUp to 2K ctx

Last refreshed 2026-10-12. Next refresh: weekly.

Details

ResearcherEleutherAI
LicenseApache 2.0OSI-approved
Commercial useCommercial use: permitted
Models1
Max context2K

About

GPT-J is an open-source, autoregressive language model developed by EleutherAI, notable for its most prominent variant, GPT-J-6B, which features 6 billion parameters. This model stands as one of the largest publicly available in the GPT-3 style category, utilizing the transformer architecture. It has been trained on extensive datasets like the Pile, designed to generate human-like text responses from given prompts. While it excels in various natural language processing tasks, its core strength is text generation. The open accessibility of GPT-J's code and weights encourages research and development, although it requires responsible use due to potential biases or offensive content it may generate 458.

Decision facts

Best fit
coding
Capability starting point
GPT-J-6B with 2K context
Lowest tracked input
Not tracked
Closest related family
GPT-Neo

Current Variants

Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.

1 in view
GPT-J-6BCurrent

Use when the workload needs 2K context and 6B parameters.

Unknown release2K context6B parameters

Release Timeline

1 release group
Unknown release
1 current
GPT-J-6B
2K context6B parameters
Current

Specifications(1 models)

GPT-J model specifications comparison
ModelReleasedContextParameters
GPT-J-6B—2K6B