OpenAI released gpt-oss-120b and gpt-oss-20b, two open-weight models meant for the community to use, adapt and audit. Sound technical? Don’t worry: it means there are now large GPT versions you can run and modify under a permissive license — but with clear responsibilities around safety and use.
What OpenAI announced
OpenAI launched two text models with open weights under the Apache 2.0 license: gpt-oss-120b (the largest) and gpt-oss-20b. They’re built to integrate with the Responses API and aimed at workflows that need reasoning, use of tools like web search, and executing code in Python.
They also support chain-of-thought (step-by-step reasoning) and structured outputs, and can be customized for different use cases. (openai.com)
Why this matters to you
Because it opens both opportunities and responsibilities. Do you work at a startup, on a research project, or as an independent developer? You can use and fine-tune these models without paying for cloud access to the model. That’s powerful: more control and lower cost for experimentation.
