OpenAI’s new open-weight models are gpt-oss-120b and gpt-oss-20b. The smaller model, gpt-oss-20b, can be run on a consumer laptop or powerful phone.

For the first time in five years, OpenAI has released two new free and open-source AI models that are lightweight and designed to be easily integrated into other software programs.

OpenAI’s GPT-5 is poised to redefine Generative AI with enhanced reasoning, longer memory, and personalisation, as Sam Altman hails it the most disruptive model to date.

Despite the company's name, OpenAI hasn't dropped an open version of its AI models since GPT-2 in 2019. That changed on Tuesday, as CEO Sam Altman shared two new open-weights, reasoning AI models, named gpt-oss-120b (120 billion parameters) and gpt-oss-20b (20 billion parameters).

It’s the first such models it’s launched in over five years, as pressure in the US grows to respond to China’s dominance in open models.

OpenAI launched a pair of open weight models today, which can compete with other open models such as Google's (NASDAQ:GOOG)(NASDAQ:GOOGL) Gemini CLI and DeepSeek's (DEEPSEEK) R1 model. OpenAI's new open weight foundation models are called gpt-oss-120b and gpt-oss-20b.

Living up to its name, OpenAI has released not one but two new open-weight AI models after promising to deliver a new open-weight model earlier this year. The two models, gpt-oss-20b and gpt-oss-120b,