openai/gpt-oss-120b

About

Welcome to the gpt-oss series, OpenAI’s open-weight models designed for powerful reasoning, agentic tasks, and versatile developer use cases.

We’re releasing two flavors of these open models:

Both models were trained on our harmony response format and should only be used with the harmony format as it will not work correctly otherwise.

This model card is dedicated to the larger gpt-oss-120b model. Check out gpt-oss-20b for the smaller model.

You can use gpt-oss-120b and gpt-oss-20b with Transformers. If you use the Transformers chat template, it will automatically apply the harmony response format. If you use model.generate directly, you need to apply the harmony format manually using…

Excerpted from huggingface.co/openai/gpt-oss-120b