While OpenAI’s closed-source AI models remain months ahead in their capabilities, Altman said on Saturday that its first open-source model may take more time to develop.
“We need time to run additional safety tests and review high-risk areas,” Altman wrote on his X account. “We are not yet sure how long it will take us.” The announcement echoes a similar one from last month, when he postponed a planned early summer release of the product.
The forthcoming model is distinct from previous releases like ChatGPT in that its source code and primary functions will be available for examination and modification by outside developers. It is an approach often adopted by companies seeking greater collaboration and more feedback on their products.

Users have been eagerly awaiting the release of this open-source model, particularly as Chinese AI companies, including DeepSeek and Alibaba Group Holding, are driving an open-source movement that is gaining traction around the world, including in the US. Alibaba owns the South China Morning Post.