A side-by-side comparison of release history, capabilities, licensing and model sizes.
| Attribute |
 FastChat
|
 OPT
|
|---|---|---|
| Developer | LMSYS | Meta |
| Current generation | – | – |
| Initial release | 2023-04-28 | 2022-05-03 |
| Instruct tuned | Yes | No |
| Coding | No | No |
| Finetuning | Yes | Yes |
| Open source | Yes | Yes |
| License | Apache 2.0 | NA |
| Model sizes | 3B | 1.3B, 2.7B, 6.7B, 13B, 30B, 66B, 175B |
| Links |
FastChat is the open platform for training, serving, and evaluating LLM chatbots developed and maintained by LMSYS.
FastChat is an open-source library for training, serving, and evaluating LLM chat systems from LMSYS. It includes training and evaluation code, a model serving system, a Web GUI, and a finetuning pipeline, and is the de facto system for Vicuna as well as FastChat-T5. FastChat also includes the Chatbot Arena for benchmarking LLMs.
Open Pre-trained Transformer Language Models (OPT) is part of the family of open source models designed to replicate GPT-3, with similar decoder-only architecture. It has since been superseded by models such as LLaMA, GPT-J, and Pythia.
