OpenAI releases lower-cost models to rival Meta, Mistral and DeepSeek

Justin Sullivan | Getty Images News | Getty ImagesOpenAI on Tuesday released two open-weight language models for the first time since it rolled out GPT-2 in 2019.The text-only models are called gpt-oss-120b and gpt-oss-20b, and are designed to serve as lower-cost options that developers, reers and companies can easily run and customize, OpenAI said.An artificial intelligence model is considered open weight if its parameters, or the elements that imve its outputs and predictions during training, are publicly available

Open-weight models can offer transparency and control, but they are different from open-source models, whose full source code becomes available for people to use and modify.Several other companies, including Meta, Microsoft-backed Mistral AI and the Chinese startup DeepSeek, have also released open-weight models in recent years."It's been exciting to see an ecosystem develop, and we are excited to contribute to that and really push the frontier and then see what happens from there," OpenAI President Greg Brockman told reporters during a briefing.The company collaborated with Nvidia, Advanced Micro Devices, Cerebras, and Groq to ensure the models will work well on a variety of chips."OpenAI showed the world what could be built on Nvidia AI — and now they're advancing innovation in open-source software," Nvidia CEO Jensen Huang said in a statement.Read more CNBC newsNvidia's set to regain some China access

But it still faces eroding AI chip market Ethereum turns 10: From scrappy experiment to Wall Street's invisible backboneGoogle has dropped more than 50 DEI-related organizations from one of its funding listsAmazon stock sinks after earnings: Here are the key takeawaysThe release of OpenAI's open weight models has been highly anticipated, in part because the company repeatedly delayed the launch.In a post on X in July, OpenAI CEO Sam Altman said the company needed more time to "run additional safety tests and review high-risk areas." That came after a separate post weeks earlier, where Altman said the models would not be released in June.OpenAI said Tuesday that it carried out extensive safety training and testing on its open-weight models.It ed out harmful chemical, biological, radiological and nu data during pre-training, and it mimicked how bad actors could try to fine-tune the models for malicious purposes

Through this testing, OpenAI said it determined that maliciously fine-tuned models were not able to reach the "high capability" threshold in its Preparedness Framework, which is its method for measuring and tecting against harm.The company also worked with three independent expert groups who vided back on its malicious fine-tuning evaluation, OpenAI said.OpenAI said people can download the weights for gpt-oss-120b and gpt-oss-20b on platforms Hugging Face and GitHub under an Apache 2.0 license

The models will be available to run on PCs through grams such as LM Studio and Ollama

Cloud viders Amazon, Baseten and Microsoft are also making the models available.Both models can handle advanced reasoning, tool use and chain‑of‑thought cessing, and are designed to run anywhere — from consumer hardware to the cloud to on-device applications.Users can run gpt-oss-20b on a laptop, for instance, and use it as a personal assistant that can through files and write, OpenAI said."We're excited to make this model, the result of billions of dollars of re, available to the world to get AI into the hands of the most people possible," Altman said in a statement Tuesday.--CNBC's Jordan Novet contributed to this reportDon’t miss these insights from CNBC Bank of America says these five stocks have more room to run ahead of earningsThese overbought stocks could take a dip after the market's record gainsGoldman Sachs is getting worried the economyWhat the prediction are saying the big Wall Street events aheadWATCH: ChatGPT set to hit 700 million weekly active users this weekwatch now2:0902:09OpenAI: ChatGPT set to hit 700 million weekly active users this weekMoney Movers