OpenAI on Tuesday released two open-weight language models for the first time since it rolled out GPT-2 in 2019.

The text-only models are called gpt-oss-120b and gpt-oss-20b, and are designed to serve as lower-cost options that developers, researchers and companies can easily run and customize, OpenAI said.

An artificial intelligence model is considered open weight if its parameters, or the elements that improve its outputs and predictions during training, are publicly available. Open-weight models can offer transparency and control, but they are different from open-source models, whose full source code becomes available for people to use and modify.

Several other tech companies, including Meta

, Microsoft