A side-by-side comparison of release history, capabilities, licensing and model sizes.
| Attribute |
 GPT-J
|
 Pythia
|
|---|---|---|
| Developer | EleutherAI | EleutherAI, Together |
| Current generation | – | – |
| Initial release | 2021-06-09 | 2023-02-13 |
| Instruct tuned | Yes | No |
| Coding | No | No |
| Finetuning | Yes | Yes |
| Open source | Yes | Yes |
| License | Apache 2.0 | Apache 2.0 |
| Model sizes | 6B | 1B, 1.4B, 2.8B, 6.9B, 12B |
| Links |
GPT-J is a model released by EleutherAI shortly after its release of GPTNeo, with the aim of delveoping an open source model with capabilities similar to OpenAI's GPT-3 model. With a larger size than GPTNeo, GPT-J also performs better on various benchmarks.
The most recent (as of May 2023) effort from EleutherAI, Pythia is a set of LLMs trained on The Pile. While it appears to outperform OPT and GPTNeo, its performance against GPT-J is unclear. Versions of Pythia have also been instruct-tuned by the team at Together.
