OpenAI launches two ‘open’ AI reasoning models
OpenAI has released two open-weight AI models—gpt-oss-120b and gpt-oss-20b—freely available on Hugging Face. Resembling the closed o-series, the 120B model runs on one Nvidia GPU, while the 20B fits on a 16GB laptop. These are OpenAI’s first open models since GPT-2, supporting tool calls and chain-of-thought reasoning. Performance tops other open rivals, though they hallucinate more. Released under Apache 2.0 (without training data), they aim to strengthen U.S. tech leadership.