OpenAI Unveils Locally-Runnable Open-Source Large Language Models

Aug 10, 2025
sebastianraschka
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Summary

OpenAI unveils gpt-oss-120b and gpt-oss-20b, open-source large language models that incorporate architectural advances, enable adjustable reasoning, and can run locally while showing competitive performance on benchmarks.

Key Points

  • OpenAI releases gpt-oss-120b and gpt-oss-20b, open-weight large language models that can run locally.
  • gpt-oss models incorporate architectural advances like sliding window attention, mixture-of-experts, and grouped query attention.
  • gpt-oss models enable adjustable reasoning efforts via prompts and show competitive performance on benchmarks compared to proprietary models.

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