gpt-oss
gpt-oss-120b and gpt-oss-20b are two open-weight language models by OpenAI
Download and use open AI language models for various tasks, including reasoning and specialized applications.
From the README
git clone https://github.com/openai/gpt-oss.git GPTOSS_BUILD_METAL=1 pip install -e ".[metal]"
- browser — a reference implementation of the browser tool the models got trained on
- python — a stateless reference implementation of the python tool the model got trained on
- Client examples:
- chat — a basic terminal chat application that uses the PyTorch or Triton implementations for inference along with the python and browser tools
- responsesapi — an example Responses API compatible server that implements the browser tool along with other Responses-compatible functionality
Excerpts from the project README on GitHub. Copyright and licensing remain with the respective authors.
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gpt-oss has 20.4k stars on GitHub. It has been forked 2.1k times. gpt-oss is written mainly in Python. It has been in active development since 2025. gpt-oss is available under the Apache-2.0 license.
What is gpt-oss?
gpt-oss-120b and gpt-oss-20b are two open-weight language models by OpenAI
Is gpt-oss open source?
gpt-oss is an open-source project. It is released under the Apache-2.0 license.
Is gpt-oss free?
Yes. gpt-oss is free and open source — you can use, modify and self-host it.
What license does gpt-oss use?
gpt-oss is available under the Apache-2.0 license.
What language is gpt-oss written in?
gpt-oss is written mainly in Python.
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