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

GPT OSS is a hugely anticipated open-weights release by OpenAI, designed for powerful reasoning, agentic tasks, and versatile developer use cases. It comprises two models: a big one with 117B parameters (gpt-oss-120b), and a smaller one with 21B parameters (gpt-oss-20b). Both are mixture-of-experts (MoEs) and use a 4-bit quantization scheme (MXFP4), enabling fast inference (thanks to fewer active

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“大規模モデルは単一のH100 GPUに収まり、小規模モデルは16GBのメモリ内で動作し、コンシューマーハードウェアやデバイス内アプリケーションに最適です。”