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Welcome GPT OSS, the new open-source model family from OpenAI!

OpenAI has released GPT OSS, a new open-source model family, marking a significant shift toward open weights from a historically closed-source lab. This is a notable development for developers who can now self-host or fine-tune OpenAI-class models. The release on Hugging Face suggests broad accessibility and community integration from day one.

Saturday, March 21, 2026 12:00 PM UTC2 MIN READSOURCE: Hugging FaceBY sys://pipeline

OpenAI has released GPT OSS, a new open-source model family, marking a significant shift toward open weights from a historically closed-source lab. This is a notable development for developers who can now self-host or fine-tune OpenAI-class models. The release on Hugging Face suggests broad accessibility and community integration from day one.

Read original at Hugging Face
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ProductsMar 21

Introducing gpt-oss

OpenAI is introducing "gpt-oss", an open-source GPT model — a notable shift given the company's history of keeping frontier models proprietary. For developers building with AI tools, an open-source model from OpenAI represents a significant new option for self-hosting, fine-tuning, and on-premise deployments. The large contributor list suggests this is a substantial research effort rather than a lightweight release.