OpenAI has just launched its first open-weight AI models in over five years: gpt-oss-120b and gpt-oss-20b. These new models mark a significant shift in OpenAI’s strategy, moving from fully proprietary releases to offering tools that developers can download, inspect, and run on their own devices.
Both models are available for free on Hugging Face and released under the Apache 2.0 license, allowing users to freely modify, redistribute, and use them for commercial purposes.
“We’re excited to make this model, the result of billions of dollars of research, available to the world,” said OpenAI CEO Sam Altman in a statement. He added that the company wants AI to be in the hands of as many people as possible.
The gpt-oss-120b model is comparable in performance to OpenAI’s proprietary o3 and o4-mini models, and in some tests, even outperforms them. The smaller gpt-oss-20b model can run locally on a consumer-grade device with more than 16GB of RAM, making it ideal for users without powerful cloud setups.
What Makes These Models Special?
- Open Weights: Anyone can download and examine the internal parameters that guide how these models function.
- Local Use: You don’t need an internet connection to run them—use them behind a firewall for better privacy.
- Chain-of-Thought Reasoning: These models follow step-by-step logic to answer prompts, improving accuracy and reliability.
- Extended Capabilities: Though text-only, they can browse the web, run code, and act as software agents.
Safety and Competition
The release was delayed for extra safety testing. OpenAI ran internal tests to measure how the models could be misused by bad actors. According to safety researcher Eric Wallace, the models did not present high-risk behaviors under OpenAI’s Preparedness Framework.
OpenAI’s move also comes as competition heats up with companies like Meta, which leads the U.S. in open-weight model development with its Llama series, and Chinese firms like DeepSeek. Altman emphasized that innovation in open AI should be rooted in democratic values and happen within the U.S.
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