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5d ago

OpenAI Releases GPT-OSS-120B and 20B as First Open-Weight Models Since 2019

Available under a permissive Apache 2.0 license, the models expand hardware compatibility beyond servers to laptops, supporting chain-of-thought tool use.

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Overview

  • GPT-OSS-120B features 117 billion parameters and runs on a single NVIDIA GPU while GPT-OSS-20B has 21 billion parameters and operates on laptops with 16 GB of memory.
  • Both text-only models integrate chain-of-thought reasoning by calling external tools such as web search and Python code execution.
  • OpenAI has published the models on platforms including Hugging Face, AWS, Azure and Databricks under Apache 2.0 licensing to allow free commercial modification.
  • Extensive safety evaluations by OpenAI and third-party experts found neither model reaches the company’s “high capability” danger threshold, even after adversarial fine-tuning.
  • The open-weight release sets a new foundation for AI innovation ahead of the GPT-5 launch and responds to growing global competition in open-model development.